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AiTechWorlds
AiTechWorlds
359+ free browser-based tools — no server, no signup required.
Convert numbers to written English words (for cheques, invoices) — 100% in your browser.
Open →Convert written English words back into a numeric value — instant, in-browser.
Open →Convert numbers to Roman numerals and Roman numerals to numbers — auto-detected.
Open →Convert text to 8-bit binary and binary back to text — UTF-8 safe, in-browser.
Open →Convert binary code to readable text and text to binary — UTF-8 safe, in-browser.
Open →Convert text to hexadecimal and hex back to text — UTF-8 safe, in-browser.
Open →Convert hexadecimal to readable text and text to hex — in-browser.
Open →Convert text to ASCII codes and ASCII codes back to text — in-browser.
Open →Convert ASCII codes to readable text and text to ASCII — in-browser.
Open →Convert text to \u Unicode escapes and back — emoji-safe, in-browser.
Open →Translate text to Morse code and Morse code to text — auto-detected, in-browser.
Open →Convert Unix epoch timestamps to human dates and dates to epoch — auto-detected.
Open →Spell any text using the NATO phonetic alphabet (Alfa, Bravo, Charlie…).
Open →Convert SubRip (.srt) subtitles to WebVTT (.vtt) for the web — in-browser.
Open →Convert WebVTT (.vtt) subtitles to SubRip (.srt) — in-browser.
Open →Extract plain text from .srt/.vtt subtitles — strips timecodes and numbering.
Open →Convert JSON to well-formed XML in your browser — no upload.
Open →Convert a .env file into a JSON object — comments and quotes handled.
Open →Convert tab-separated values (TSV) to CSV with proper quoting — in-browser.
Open →Convert newline-delimited JSON (NDJSON/JSONL) into a JSON array — in-browser.
Open →Convert a JSON array of objects into SQL INSERT statements — in-browser.
Open →Convert SQL INSERT statements into a JSON array of objects — in-browser.
Open →Convert HTML to React JSX — class→className, inline styles to objects, self-closed tags.
Open →Convert an SVG into JSX for React — hyphenated attributes become camelCase.
Open →Convert CSS declarations into Tailwind utility classes (best-effort, arbitrary values).
Open →Convert JSON into a Go struct with json tags — handles nested objects and arrays.
Open →Convert a cURL command into JavaScript fetch() code — headers, method and body.
Open →Convert HEX colors to RGB/RGBA — supports #rgb, #rrggbb and alpha.
Open →Convert RGB/RGBA colors to HEX — paste one or many colors.
Open →Convert HSL colors to HEX — paste one or many colors.
Open →Convert Markdown to clean HTML in your browser — GitHub-flavored, no upload.
Open →Convert HTML to clean Markdown in your browser — headings, lists, links, code.
Open →Convert Markdown to a downloadable PDF in your browser — no upload, no signup.
Open →Convert Word (.docx) documents to PDF in your browser — private, no upload.
Open →Extract plain text from a Word (.docx) document in your browser — no upload.
Open →Convert Excel (.xlsx/.xls) to CSV in your browser — first sheet, no upload.
Open →Convert Excel (.xlsx/.xls) to JSON in your browser — first sheet, no upload.
Open →Convert CSV to a downloadable Excel (.xlsx) workbook in your browser — no upload.
Open →Convert a JSON array of objects to a downloadable Excel (.xlsx) — no upload.
Open →Convert any website or HTML into editable Figma designs using a Figma plugin — step-by-step guide.
Open →Export Figma designs to HTML/CSS using a Figma plugin — step-by-step guide.
Open →How to turn an HTML web page into a Photoshop (PSD) file — practical methods and tools.
Open →Convert Adobe XD designs to Figma using a plugin — step-by-step guide.
Open →Convert every page of a PDF to PNG, JPG, or WebP images and download individually or as a ZIP — 100% in your browser.
Open →Combine JPG and PNG images into a single PDF, with page size, orientation, and margin options — 100% in your browser.
Open →Combine two or more PDF files into one, in the order you choose — 100% in your browser, no upload.
Open →Extract a page range into a new PDF, or split every page into its own file — 100% in your browser.
Open →Reorder, delete, and extract PDF pages with a visual page grid — 100% in your browser.
Open →Rotate all pages at once or fine-tune individual pages with live thumbnails — 100% in your browser.
Open →Trim margins from every page with a live preview — 100% in your browser.
Open →Rasterize every page so form fields and annotations become a permanent, uneditable image — 100% in your browser.
Open →Stamp custom text — like CONFIDENTIAL or DRAFT — across every page, with adjustable color, opacity, and angle.
Open →Add page numbers to every page with custom position, format, and starting number — 100% in your browser.
Open →Reduce PDF file size by re-rendering pages at your chosen quality — 100% in your browser, shows percent saved.
Open →Extract selectable text from a PDF as plain text or Markdown, with heading detection — 100% in your browser.
Open →Convert plain text into a clean, paginated PDF — 100% in your browser, no signup.
Open →Extract text from a PDF into an editable Word (.docx) document — 100% in your browser.
Open →Extract tables from a PDF into an Excel .xlsx workbook, one sheet per page — 100% in your browser.
Open →Diff the text of two PDFs, page by page, and highlight what was added or removed — 100% in your browser.
Open →Draw black boxes over sensitive content, with an option to rasterize redacted pages so text is permanently destroyed.
Open →Type or upload a signature and place it on any page — 100% in your browser (visual signature, not a certificate-based e-signature).
Open →Reorder and delete pages, add a watermark, and number pages in one pass — 100% in your browser.
Open →Generate realistic fake names, emails, addresses, phones and test data as JSON or CSV — 100% in your browser.
Open →Create custom placeholder images (any size, color and label) and download as PNG/JPG/WebP — drawn locally on a canvas.
Open →Pick random numbers, shuffle a list, roll dice or flip a coin — fair, in-browser randomness for giveaways and raffles.
Open →Turn text into bold, italic, script, strikethrough and other Unicode styles for social bios and posts.
Open →Repeat text N times, reverse text or lines, remove duplicate lines, or sort lines alphabetically.
Open →Build trackable campaign URLs with utm_source, medium, campaign, term and content for Google Analytics.
Open →Generate schema.org structured data (Article, Product, FAQ, Organization, Breadcrumb…) as ready-to-paste JSON-LD.
Open →Analyze single-word and 2–3 word phrase frequency and density in your content to avoid keyword stuffing.
Open →Generate hreflang alternate link tags for multilingual sites, including x-default.
Open →See exactly how text splits into GPT tokens, with colored tokens, token IDs and chars-per-token stats.
Open →Build OpenAI function-calling or Anthropic tool-use JSON schemas from simple fields.
Open →Validate JSONL fine-tune datasets line by line, including the chat messages format and training target.
Open →Measure your prompt against GPT, Claude, Gemini and Llama context windows and see if it fits.
Open →Compare your resume against a job posting to see your keyword match % and the terms you are missing.
Open →Convert pay between hourly, weekly, monthly and annual, with a rough after-tax take-home estimate.
Open →Generate a clean, customizable cover letter draft from a few details — template-based, no AI.
Open →Beautify and re-indent JSON, CSS, HTML and SQL with selectable indentation — fully in your browser.
Open →Escape or unescape strings for JSON, JavaScript, CSV, SQL, URL and HTML contexts.
Open →Pretty-print GraphQL queries, mutations and fragments with clean, consistent indentation.
Open →Parse any User-Agent string into browser, OS, device type, engine and bot detection.
Open →Turn a method, URL, headers and body into ready-to-use curl, fetch, axios or Python requests code.
Open →Define a schema and generate a realistic mock JSON API response for prototyping and testing.
Open →Convert JSON to a URL query string (with nested bracket notation) and back, bidirectionally.
Open →Turn AVIF photos into universally-supported JPGs — drop in 50+ files or a ZIP and get one ZIP back. Your images never leave the browser.
Open →Convert AVIF to lossless PNG when you need transparency or maximum quality. Batch-convert dozens at once, all on your own machine.
Open →Open stubborn WebP files anywhere by converting them to PNG. Handles 50+ images or a whole ZIP in one pass, entirely offline.
Open →Swap WebP for JPG for smaller files and wider support — email attachments, old apps, print. Bulk in, single ZIP out.
Open →Shrink heavy PNGs into WebP and cut page weight without visible quality loss. Convert a folder at a time, right in your browser.
Open →Compress JPGs into modern WebP for faster-loading sites. Drop in 50+ photos or a ZIP and download them all at once.
Open →Make a proper .ico favicon from any PNG, ready for your site or desktop app. Batch several icons and grab them in one ZIP.
Open →Rename-and-fix those JFIF files your camera or browser saved — convert straight to standard JPG in bulk, no upload required.
Open →Turn awkward JFIF images into clean PNGs that open in any editor. Process 50+ at once, all locally on your device.
Open →Compress bulky BMP files into lightweight JPGs — same picture, a fraction of the size. Convert a batch and download one ZIP.
Open →Pull a crisp still PNG out of a GIF, keeping transparency intact. Feed it 50+ frames or a ZIP and it never touches a server.
Open →Calculate semester GPA and cumulative CGPA for 50+ world university grading systems — credit-weighted, with scale conversion.
Open →Convert CSV data to JSON and JSON arrays back to CSV — auto-detects delimiter, supports download.
Open →Convert YAML to JSON and JSON to YAML — handles multi-document YAML and nested objects.
Open →Compare two texts side-by-side or inline — highlights added, removed, and changed lines.
Open →Format, validate and minify JSON instantly in your browser. No data leaves your machine.
Open →Remove duplicate lines from any text — with case, trim, and sort options.
Open →Convert text between camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE — all at once.
Open →Turn any text into a clean URL slug with custom separator and unicode support.
Open →Encode plain text or URLs to Base64, or decode Base64 strings back — fully client-side.
Open →Decode any JWT token to read the header, payload and expiry. Nothing is sent to any server.
Open →Encode and decode URI components instantly — with query-safe mode and live preview.
Open →Encode and decode HTML entities — supports full safe mode and all named entities.
Open →Generate v4 UUIDs — single or bulk, with format options. Uses crypto.randomUUID().
Open →Cryptographically secure passwords with strength meter, entropy score, and history.
Open →Hash text with SHA-1, SHA-256, SHA-384 and SHA-512 simultaneously using Web Crypto.
Open →Preview how your page looks in Google search, Open Graph, and Twitter cards — with HTML output.
Open →Compose URLs from protocol, domain, path segments, query params, and fragment — with colored output.
Open →Deep compare two JSON objects — visual line diff and per-key summary of what changed.
Open →Write a regex pattern, set flags, and test it against any string — matches highlight in real time.
Open →Every HTTP status code explained with description and example use case — searchable.
Open →Decode and edit URL query strings — live table, JSON export, curl format.
Open →Build cron expressions visually or by typing — with human-readable description and next 5 run times.
Open →Calculate date differences, add/subtract days, and compute ages with working-day support.
Open →Compare times across multiple timezones with live refresh and meeting planner mode.
Open →Score your text with 7 readability formulas — Flesch, Fog, SMOG, ARI, and Coleman–Liau — in one pass.
Open →Convert Unix timestamps (seconds or ms) to human dates and vice versa — all formats at once.
Open →Count words, characters, sentences, paragraphs — plus reading and speaking time estimates.
Open →Build CSS box shadows visually — multiple layers, color, opacity, inset, and live preview.
Open →Control each corner independently, pick a unit, and copy the CSS or Tailwind class instantly.
Open →Build linear, radial, and conic CSS gradients with multi-stop color pickers and live preview.
Open →Experiment with every flex container and item property — live preview and CSS output.
Open →Design CSS grid layouts visually — define columns, rows, gaps, and place items with live preview.
Open →Convert between px, rem, em, %, pt, vw and vh instantly. Configure base font size and viewport.
Open →Write Markdown and see a live rendered preview side-by-side, with GitHub-flavored tables, code blocks, and task lists.
Open →Pick any color and get tints, shades, complementary, triadic and analogous palettes with CSS variables.
Open →Build robots.txt with Allow/Disallow rules, crawl delays, sitemaps, and AI-bot presets.
Open →Create XML sitemaps from manual URL input — with lastmod, changefreq, priority, and download.
Open →Watch Bubble, Selection, Insertion, Merge, and Quick Sort step-by-step with synced code, step explanations, and side-by-side comparison.
Open →Animate Bubble Sort step-by-step with live pseudocode highlighting, comparison/swap counters, and C++/Java/Python/JS code.
Open →Visualize Selection Sort finding the minimum each pass, with synced code, stats, and complexity breakdown.
Open →See Insertion Sort build the sorted prefix one element at a time, with live code highlight and step explanations.
Open →Watch Merge Sort divide and merge with guaranteed O(n log n) behaviour, synced pseudocode, and multi-language code.
Open →Visualize Quick Sort partitioning around a pivot, with live code, swap counters, and worst-case explanation.
Open →Watch Heap Sort build a max-heap and extract the maximum repeatedly, with synced code and O(n log n) guarantees.
Open →Visualize Shell Sort using shrinking gap sequences, an in-place improvement over Insertion Sort, with synced code.
Open →See Counting Sort tally value frequencies and write back in linear O(n+k) time — non-comparison sorting visualized.
Open →Visualize Radix Sort processing numbers digit by digit with stable counting passes, in linear O(nk) time.
Open →Watch Bucket Sort distribute values into buckets, sort each, and concatenate — fast on uniform data.
Open →Visualize Tim Sort — the hybrid insertion + merge sort used by Python and Java — with synced code and step explanations.
Open →See Introsort run Quick Sort then fall back to Heap Sort at the depth limit — the algorithm behind C++ std::sort.
Open →Visualize Linear, Binary, Jump, Interpolation, and Exponential Search step-by-step with synced code and a live range pointer.
Open →Animate Linear Search scanning each element until it finds the target, with synced code and comparison counter.
Open →Watch Binary Search halve a sorted array each step with a live lo/mid/hi range, synced pseudocode, and multi-language code.
Open →Visualize Jump Search stepping in √n blocks then scanning, with synced code and step explanations.
Open →See Interpolation Search estimate the target position from value distribution, with synced code and live range.
Open →Watch Exponential Search double a range bound then binary search inside it, with synced code and step explanations.
Open →Visualize BFS, DFS, Dijkstra, A*, Prim, Kruskal, and Topological Sort on an interactive draggable graph with synced code.
Open →Animate Breadth-First Search exploring a graph level by level with a live queue, synced code, and draggable nodes.
Open →Watch Depth-First Search dive deep and backtrack with a live stack, synced pseudocode, and an interactive graph.
Open →Visualize Dijkstra finding shortest paths with live distance labels, edge relaxation, and synced multi-language code.
Open →See A* pathfinding use g+h scores to reach a goal fast, with live open set, path highlight, and synced code.
Open →Watch Prim's algorithm grow a minimum spanning tree by adding the cheapest crossing edge, with synced code.
Open →Visualize Kruskal's MST sorting edges and using union-find to avoid cycles, with synced code and live weight.
Open →Animate Kahn's topological sort removing in-degree-0 nodes from a DAG, with live order, in-degrees, and synced code.
Open →Insert, delete, and search in a BST with animated paths and inorder/preorder/postorder/level-order traversals.
Open →Insert and delete in a self-balancing AVL tree with live balance factors and LL/LR/RL/RR rotation animations.
Open →Insert and extract-min on a binary min-heap with sift-up/sift-down animation and a synced array + tree view.
Open →Insert and search words in a trie with shared-prefix nodes, end-of-word markers, and an animated search path.
Open →Insert, delete, search, and reverse a singly linked list with animated nodes, pointers, and multi-language code.
Open →Visualize a doubly linked list with next/prev pointers — insert, delete, search, and reverse with synced code.
Open →Visualize a circular linked list whose tail links back to the head — insert, delete, search, and reverse.
Open →Watch DP tables fill cell by cell for Fibonacci, LIS, Coin Change, 0/1 Knapsack, and LCS with synced multi-language code.
Open →Animate the bottom-up Fibonacci DP table, each value summed from the previous two, with synced code.
Open →Visualize the O(n²) LIS dynamic programming table filling step-by-step, with synced multi-language code.
Open →Watch the minimum-coins DP table build up for a target amount, with synced multi-language code.
Open →Animate the 0/1 Knapsack 2D DP table maximizing value within a weight capacity, with synced code.
Open →Visualize the LCS 2D DP table comparing two strings character by character, with synced multi-language code.
Open →Watch N-Queens, Sudoku, Rat in a Maze, and Knight’s Tour solved with backtracking — try, place, and undo animated on a board.
Open →Animate the N-Queens backtracking solver placing queens row by row and backtracking on conflicts, with synced code.
Open →Watch a Sudoku solver try digits and backtrack cell by cell until the board is complete, with synced code.
Open →Visualize backtracking find a path through a maze, exploring directions and undoing dead ends, with synced code.
Open →Animate the knight's tour backtracking solver visiting every square once, with synced multi-language code.
Open →Live-sync between Decimal, Binary, Hex and Octal — with step-by-step explanations.
Open →AND · OR · XOR · NOT · Shifts with visual bit-grid and plain-English explanations.
Open →Generate truth tables from logical expressions with AND, OR, NOT, XOR, NAND, NOR.
Open →Estimate token count and API cost for ChatGPT, Claude, and Gemini prompts — live, client-side.
Open →Compare API costs across OpenAI, Anthropic, Google, Groq, and Mistral models side-by-side.
Open →Format system/user/assistant prompts into OpenAI JSON, Markdown, Plain Text, or XML.
Open →Analyze your GitHub profile and LeetCode stats to get a career score and personalized roadmap.
Open →Generate a professional GitHub profile README.md with badges, stats, and social links.
Open →Generate shields.io tech stack badges for your GitHub README — 40+ languages and frameworks.
Open →Validate Dockerfile syntax and check best practices — errors, warnings, and fix suggestions.
Open →Build .gitignore files from language and framework templates — download ready.
Open →Build conventional commit messages with type, scope, body, and breaking change support.
Open →Validate .env files — find duplicates, missing values, syntax errors, and exposed secrets.
Open →Generate docker-compose.yml from a form — services, ports, volumes, env vars, and quick presets.
Open →Generate CI/CD workflow YAML for Node.js, Python, Go, Rust, Docker, or static sites.
Open →Generate nginx server blocks for static sites, reverse proxies, or load balancers.
Open →Build a valid package.json interactively — scripts, dependencies, license, and metadata.
Open →Convert any JSON into TypeScript interfaces or type aliases — with nested type inference.
Open →Convert XML to JSON and JSON to XML — using browser DOMParser, no libraries needed.
Open →Convert CSV data into SQL INSERT statements with auto type detection and CREATE TABLE.
Open →Build markdown tables with a spreadsheet editor — column alignment, CSV import, download.
Open →Build and sign JWT tokens with HS256 using Web Crypto API — header, payload, and secret.
Open →Hash and verify passwords with bcrypt — configurable salt rounds, all client-side.
Open →Generate TOTP one-time codes (Google Authenticator style) using Web Crypto — no server.
Open →Convert colors between HEX, RGB, RGBA, HSL, HSB, and Tailwind — with live preview.
Open →Translate Tailwind CSS class names between v2, v3, and v4 — highlights changed classes.
Open →Focus timer with short/long breaks, session tracking, and daily streak — saved in localStorage.
Open →Generate customizable QR codes from any text or URL — size, colors, error correction, and PNG download.
Open →Compress PNG, JPEG, and WebP images in your browser with a quality slider and before/after size comparison.
Open →Convert any image to a Base64 data URI with ready-to-copy CSS and HTML snippets — 100% in-browser.
Open →Check any HTTPS site’s SSL certificate — issuer, validity dates, days to expiry, and SSL Labs grade.
Open →Look up A, AAAA, MX, TXT, NS, CNAME, and SOA records for any domain via DNS-over-HTTPS.
Open →Find geolocation, ISP, organization, and ASN for any IP address — or your own — instantly.
Open →Inspect a URL’s response headers and grade its security setup — HSTS, CSP, X-Frame-Options, and the rest.
Open →Validate an email address by syntax, disposable-domain check, and live MX-record lookup — no test email sent.
Open →Format and beautify messy SQL with keyword casing, clause newlines, and indentation — all in-browser.
Open →Minify HTML, CSS, and JavaScript safely in your browser — strips comments and whitespace with size savings.
Open →Generate placeholder text by paragraphs, sentences, or words, with optional HTML wrapping and one-click copy.
Open →Convert length, weight, data, speed, area, volume, and time units with instant two-way conversion.
Open →Measure your typing speed (WPM) and accuracy in real time with live character highlighting and passages.
Open →Build a copyable curl command from method, URL, headers, body, and auth — no syntax memorization needed.
Open →Convert PNG images to JPG with adjustable quality — flattens transparency, 100% in-browser.
Open →Convert JPG images to lossless PNG instantly in your browser — no upload, no signup.
Open →Convert WebP to PNG/JPG or convert PNG/JPG to WebP for smaller files — browser-based, private.
Open →Resize PNG, JPG, and WebP images by pixels or percentage with aspect-ratio lock — no upload.
Open →Crop images by dragging a selection box — full-resolution output, 100% in your browser.
Open →Rotate or flip any image (PNG, JPG, WebP) and download full-resolution — 100% in your browser, no upload.
Open →Add a text watermark to a photo with custom position, color, opacity, and tiling — browser-based, private.
Open →Strip EXIF, GPS location, and camera metadata from JPG/PNG images for privacy — 100% in your browser.
Open →Generate favicon.ico plus all PNG sizes (Apple touch, Android, PWA) from one image — browser-based, no upload.
Open →Add classic top/bottom captions to any image and download — 100% in your browser, no signup.
Open →Convert SVG files to crisp PNG at up to 4× resolution with optional transparent background — browser-based, private.
Open →Pick exact HEX/RGB colors from any image and extract a dominant palette — 100% in your browser, no upload.
Open →Combine multiple photos into a grid collage with custom layout, spacing, and background — 100% in-browser.
Open →Blur faces, license plates, or any region of an image for privacy — drag to select, baked into the export.
Open →Validate JSON and explore it as a collapsible tree with syntax colors — browser-based, private.
Open →Check text/background color contrast against WCAG AA and AAA with a live preview and ratio.
Open →Count characters, words, sentences, and lines with live limits for Twitter/X, meta descriptions, and SMS.
Open →Turn source code into beautiful, syntax-highlighted images for sharing — themes, chrome, export PNG.
Open →Resize and crop photos to the exact pixel dimensions for Instagram, Facebook, Pinterest, YouTube, TikTok, X and LinkedIn — 18 presets, 100% in your browser.
Open →Split one photo into a 3×3, 3×1, 1×3 or 2×2 grid for an Instagram puzzle feed post — download every tile as a ZIP.
Open →Build a bold, click-worthy YouTube thumbnail with multiple text layers, filters and outlines — exports at 1280×720.
Open →Add a text or logo watermark to your photos before sharing — position, opacity, rotation and tiling, all in your browser.
Open →Extract a brand color palette (hex codes) from any photo — sampled directly from pixels via the Canvas API, no upload.
Open →Preview Reels, Shorts and TikTok safe zones so captions and text never get covered by platform UI — plus 1:1 and 4:5 feed post overlays.
Open →Generate a balanced mix of broad, mid-reach and niche hashtags for Instagram, TikTok, Pinterest, X and YouTube from a curated dataset.
Open →Generate ready-to-post captions by goal — engagement, promo, storytelling, educational or inspirational — from curated templates.
Open →Generate SEO-friendly Pinterest pin titles and descriptions with character counters matching Pinterest’s limits.
Open →Generate scroll-stopping opening lines for Reels, Shorts and TikTok by hook style — curiosity, controversy, relatable, numbered, story.
Open →Generate a printable QR card linking to your Instagram, TikTok, YouTube or other profile — style it and list all your platforms in one image.
Open →Check your YouTube title, description and tags against YouTube's character limits and best-practice sweet spots before publishing.
Open →Find the best days and time windows to post on Instagram, TikTok, YouTube, Facebook, Pinterest, X and LinkedIn, in your own timezone.
Open →Browse emoji by category or trending combo presets and copy them straight into your caption or bio.
Open →Turn pasted text into a multi-slide Instagram/LinkedIn carousel — styled 1080×1080 slides with slide-count dots, downloadable as a ZIP.
Open →Build a free "link in bio" landing page with your links and theme, and download it as a self-contained HTML file to host anywhere.
Open →Check a handle against Instagram, TikTok, YouTube, X, Facebook, Pinterest, GitHub and Threads length/character rules, with quick-check links.
Open →Plan your posting schedule across platforms, saved locally in your browser — export as CSV or an .ics calendar file.
Open →Create a professional invoice with line items, tax and discount, and print or save it as a PDF — free, no signup, no per-invoice fee.
Open →Create a professional price quotation or estimate for a client and print or save it as a PDF — free, no signup.
Open →Calculate profit margin, markup percentage, or the price needed to hit a target margin — free, instant, in your browser.
Open →Calculate the break-even point in units and revenue from fixed costs, price and variable cost per unit, with a profit projection table.
Open →Calculate monthly EMI, total interest and a full amortization schedule for any loan — free, instant, in your browser.
Open →Calculate the minimum hourly rate you need to charge based on your income goal, expenses, and billable hours.
Open →Generate business name ideas from a keyword, then get matching slogan suggestions — free, instant, no AI call.
Open →Calculate return on investment and annualized ROI to compare investments held for different time periods.
Open →Add or extract sales tax / VAT from a price, with common national rate presets — free, instant, in your browser.
Open →Calculate a sale price from one or more stacked discounts, and see the true effective discount percentage.
Open →Calculate the true total cost of an employee beyond base salary — payroll tax, benefits, equipment and overhead.
Open →Estimate one-time and monthly startup costs plus a cash runway, with an editable default checklist.
Open →Generate a scannable QR code for PayPal.me, Venmo, Cash App, UPI, bKash or a custom payment link.
Open →See what a meeting is really costing in real time based on attendees and average hourly rate.
Open →Convert between currencies using a rate you enter — no live API, useful for quoting invoices in another currency.
Open →Compare avalanche vs. snowball debt payoff strategies across multiple debts — months to debt-free and total interest.
Open →Project compound growth of a lump sum plus monthly contributions, with a year-by-year balance schedule.
Open →Calculate monthly mortgage payment (principal, interest, tax, insurance) and view a yearly amortization schedule.
Open →Project your retirement nest egg from current savings and monthly contributions, and check it against your income goal.
Open →See how inflation erodes purchasing power over time, and what today’s amount will be worth in the future.
Open →Find the monthly deposit needed to reach a savings goal by a target date, accounting for investment growth.
Open →Add your assets and liabilities to calculate your total net worth, with a live running total.
Open →Estimate how long an article takes to read from word count and reading speed.
Open →Check meta title character count and pixel width against Google SERP limits, with a live preview.
Open →Check meta description character count and pixel width against Google SERP limits, with a live preview.
Open →Preview how og:title, og:description and og:image render as Facebook, LinkedIn and Twitter/X cards.
Open →Paste a page's HTML to extract and validate its canonical tag against the page URL.
Open →Preview how a title, URL and meta description render in Google search results on desktop and mobile.
Open →Plan internal links between pages with target keywords and anchor text in a simple worksheet.
Open →Estimate keyword difficulty from manually entered search volume, competitor authority and backlinks.
Open →Trim whitespace, collapse spaces, strip HTML, remove URLs/emojis and clean up messy pasted text.
Open →Trim, collapse or fully remove whitespace from text with multiple cleanup modes.
Open →Strip HTML tags and decode entities to get clean plain text, with optional line-break preservation.
Open →Write Markdown with a live-rendered preview — headings, bold/italic, lists, code blocks and links.
Open →Generate APA, MLA and Chicago-style web citations from author, title, site and URL fields.
Open →Analyze word frequency and keyword usage in your content, with stop-word filtering.
Open →Check YouTube video description length against the first-line and total character limits.
Open →Count YouTube video tags and total characters against the 500-character combined limit.
Open →Preview a YouTube thumbnail in grid, mobile feed and search result layouts before uploading.
Open →Plan upload dates and production status for upcoming videos in a simple content calendar.
Open →Estimate YouTube ad revenue and creator payout from monthly views, CPM and monetized view %.
Open →Project subscriber growth over time and estimate months to reach a subscriber goal.
Open →Sum clip lengths into a total video runtime, with playback-speed-adjusted duration.
Open →Reorder videos in a playlist and track total watch time before rebuilding it in YouTube Studio.
Open →Pre-publish checklist covering title, description, thumbnail, metadata and engagement best practices.
Open →Check pin title character count against Pinterest's 100-character limit, with a grid preview.
Open →Check pin description length, hashtag count and call-to-action presence against best practices.
Open →Track target keywords, assigned boards and whether each has been used in a pin yet.
Open →Plan which pins go out on which dates and times, tracking progress toward a daily pin target.
Open →Plan board names, keyword-rich descriptions and categories before creating them on Pinterest.
Open →Reference calendar of seasonal Pinterest content ideas by month, based on the 45-day pinning lead time.
Open →Calculate save rate and click-through rate from Pinterest Analytics stats, ranked by performance.
Open →Check pasted HTML for the Open Graph tags required for Pinterest Rich Pins eligibility.
Open →Reference guide to Pinterest's recommended pin, Idea Pin, profile and board cover image dimensions.
Open →Build a Pinterest "Pin it" button or save-button URL from a page, image and description.
Open →Group hashtags by reach, niche and branded categories, then copy a de-duplicated combined list.
Open →Browse and copy emojis by category for captions, comments and bios.
Open →Decode a QR code from an uploaded image using your browser's built-in barcode scanner.
Open →Generate short social media bio variants from your role, niche, achievement and call-to-action.
Open →Track daily habit completion across a 7-day grid with a weekly completion rate.
Open →Plan top priorities and hour-by-hour time blocks for your day.
Open →Plan tasks across all 7 days of the week with a main weekly goal.
Open →Plan a full month in a calendar grid with per-day notes and a monthly goal.
Open →Track progress toward measurable goals with a target date and progress bar.
Open →Structured meeting notes with agenda, freeform notes and trackable action items.
Open →Build any custom checklist with progress tracking and Markdown export.
Open →Generate a downloadable .ics calendar file or Google Calendar add-event link for any event.
Open →Pre-launch checklist for developer and designer portfolios covering foundations, projects and polish.
Open →Generate behavioral, technical, leadership and situational interview questions to practice or interview with.
Open →Generate a general-purpose freelance services agreement template from simple form fields.
Open →Generate friendly, firm or final-notice payment reminder messages for overdue invoices.
Open →Track time spent per task with start/stop timers and a billable total from your hourly rate.
Open →Estimate a client-ready project quote from task hours, hourly rate, fixed costs and a contingency buffer.
Open →Compare hourly, fixed-fee and value-based pricing models to price a client proposal.
Open →Sort a list of lines alphabetically or by length, with optional deduplication.
Open →Count hashtags in a caption and check them against common per-platform guidelines.
Open →Check one piece of text against character limits for 8 major social platforms at once.
Open →Add Instagram-safe line-break spacing and generate bold/italic Unicode caption styles.
Open →Generate a professional HTML email signature with name, title, contact details and an accent color.
Open →Generate a simple project proposal with deliverables, pricing and timeline from form fields.
Open →Calculate a recommended marketing budget from revenue and allocate it across channels.
Open →Allocate monthly income across spending categories in a zero-based-style budget.
Open →Log expenses with categories and get an automatic spending breakdown by category.
Open →Track recurring subscriptions across billing cycles and see true total monthly and yearly cost.
Open →Turn a 5-field cron expression into a plain-English schedule description, field by field.
Open →Simulate request latency, jitter, timeouts and random failures to test loading/error UI states.
Open →Compare two semver strings and classify the change as major, minor, patch or pre-release.
Open →Generate a fluid CSS clamp() expression that scales linearly between a min and max size across viewports.
Open →Simplify a width/height ratio and calculate the missing dimension to preserve it at a new size.
Open →Generate a modular type scale (base size × ratio) as CSS custom properties, with a live preview.
Open →Validate JSON-LD structured data syntax and check for required fields per schema.org type.
Open →Track published dates and refresh intervals for posts, sorted by what needs updating soonest.
Open →Track topics competitors cover that you don't yet, prioritized to plan a content calendar.
Open →Calculate simple and discounted payback period for an investment from cash flows.
Open →Calculate a recommended emergency fund target based on expenses and job stability, with a savings timeline.
Open →Model best/worst-case exchange rate outcomes and the effect of hedging a portion of exposure.
Open →Calculate a tip and split a bill evenly across any number of people.
Open →Sort tasks into Do/Schedule/Delegate/Delete quadrants by urgency and importance.
Open →Start/stop a timer to log focus sessions with labels and see total focus time by day.
Open →Score multiple options against weighted criteria to get an objective, ranked decision.
Open →Calculate BMI and daily calorie needs (BMR/TDEE) based on height, weight, age and activity level.
Open →Generate 3 variants of a 30-second elevator pitch from your role, experience and goal.
Open →Generate negotiation scripts for opening, countering, holding firm and accepting an offer.
Open →Check a LinkedIn headline's length and structure against desktop/mobile truncation limits.
Open →AiTechWorlds provides free online developer tools that run entirely in your web browser. Every tool on this page processes data locally using JavaScript — nothing is uploaded to any server, and no account is required. Whether you are a frontend developer, backend engineer, DevOps specialist, or student learning programming, you will find utilities here that save time on common tasks.
The collection covers eight categories: data and text transformation, encoding and security, API debugging, productivity utilities, CSS and UI generation, algorithm visualization, Git and DevOps helpers, and SEO file generators. All tools are free permanently, work on desktop and mobile browsers, and are continuously updated to reflect current developer standards.
Privacy is a core principle. Tools like the Password Generator, SHA Hash Tool, JWT Decoder, and Env Validator handle sensitive information — passwords, tokens, API keys, and environment variables. Because all computation happens in your browser using the Web Crypto API and standard JavaScript, sensitive data never leaves your device.
Data and text tools help developers transform, format, and manipulate structured data formats. Whether you need to convert CSV to JSON for an API, validate YAML configuration files, generate TypeScript interfaces from JSON, convert XML to JSON, build SQL INSERT statements from CSV, or create Markdown tables visually — these tools handle the most common data manipulation tasks developers face daily.
UI and CSS tools give frontend developers a visual interface for generating CSS code. Instead of manually writing box-shadow values or gradient color stops, you use sliders and color pickers and get production-ready CSS instantly. The Color Format Converter handles HEX, RGB, HSL, and HSB simultaneously. The Tailwind Class Translator converts deprecated class names between v2, v3, and v4. The Flexbox Playground and Grid Builder make layout experimentation fast and intuitive.
PDF tools let you merge, split, compress, rotate, and convert PDF files without uploading them anywhere. Combine several PDFs into one with drag-to-reorder, extract page ranges or split every page, shrink file size with adjustable quality, rotate pages with live thumbnails, render pages to JPG/PNG, and build a PDF from images. Every operation runs in your browser, so even confidential documents stay completely private.
SEO tools help developers and content creators generate the technical files that search engines require. The Robots.txt Generator builds allow/disallow rule sets with AI bot blocking presets, while the Sitemap Generator creates valid XML sitemaps from manually entered URL lists — both downloadable as ready-to-deploy files.
AI developer tools help engineers working with large language model APIs manage costs, format prompts, and understand token usage. The Prompt Token Counter estimates how many tokens your prompt will consume across GPT-4o, Claude, and Gemini — so you can optimize before sending a request. The AI API Cost Calculator compares pricing across eight models side-by-side. The Prompt Formatter structures system, user, and assistant messages into OpenAI JSON, Markdown, XML, or plain text formats for use across any LLM provider.
Career tools help developers assess and present their technical skills. The Developer Career Analyzer fetches your GitHub public profile and LeetCode stats to compute a 0-100 career score and suggest what to work on next. The GitHub Profile README Generator builds a polished profile README with tech badges, stats widgets, and social links. The Tech Stack Badge Generator creates shields.io badges for 40+ languages and frameworks so you can showcase your stack in any README or portfolio.
Debug and API tools accelerate the development and testing of web APIs. The Regex Tester helps validate patterns before deployment, the HTTP Status Explorer provides instant reference for every status code, and the Query Parameter Parser decodes complex URL strings into editable key-value tables — all without leaving your browser.
Image tools convert, resize, crop, and optimize pictures entirely in your browser. Convert PNG to JPG, JPG to PNG, to or from WebP, and turn iPhone HEIC photos into JPG. Resize by pixels or percentage with aspect-ratio lock, crop with a drag selection at full resolution, compress for faster page loads, encode to Base64, and generate QR codes — all without uploading a single file.
Productivity tools save time on the repetitive calculations and lookups that interrupt developer workflow. The Pomodoro Timer tracks focus sessions, breaks, and streaks using localStorage — no account needed. Cron expression building, date arithmetic, timezone comparison for scheduling distributed team meetings, and text readability analysis — these tools eliminate context-switching and keep you in your flow.
Encoding and security tools provide essential cryptographic and encoding utilities for backend developers, security engineers, and API builders. From decoding and building JWT tokens to generating bcrypt password hashes, TOTP 2FA codes, cryptographically secure UUIDs, and hashing text with SHA-256 — these tools use browser-native Web Crypto API, meaning your sensitive data never touches a server.
Algorithm tools are educational resources for developers learning computer science fundamentals. The Sorting Visualizer animates five classic sorting algorithms step-by-step, the Binary Converter synchronizes decimal, binary, hex, and octal representations in real-time, and the Truth Table Generator evaluates complex logical expressions automatically.
Git and DevOps tools help developers follow best practices and generate configuration files. Generate docker-compose.yml from a form with preset stacks, produce GitHub Actions CI/CD workflows for Node.js, Python, Go, Rust, and Docker projects, create nginx server blocks for static sites or reverse proxies, build package.json interactively, generate .gitignore files, and validate Dockerfiles for best-practice issues — all without leaving the browser.
No Installation Required
Open a URL and the tool is ready. No npm install, no downloads, no version conflicts — just open your browser.
Your Data Stays Private
Client-side processing means sensitive data like passwords, tokens, and source code never reaches any server.
Works on Any Device
Responsive design ensures every tool works on desktop browsers, tablets, and mobile phones without modification.
Always Up to Date
Tools are updated server-side — you always get the latest version without managing updates yourself.
Zero Cost
All tools are completely free. No subscription tiers, no feature limits, no credit card required.
Fast and Offline-Capable
Once loaded, most tools continue to work without network access since they rely entirely on browser JavaScript.
Based on common developer workflows, these are the tools you are likely to reach for most often:
JSON Formatter
Format and validate API responses instantly
Regex Tester
Test patterns before adding them to code
UUID Generator
Generate IDs for database records and tests
Base64 Encoder
Debug auth headers and image encoding
JWT Decoder
Inspect token payloads during API development
Timestamp Converter
Convert Unix timestamps in log files
CSS Units Converter
Convert px to rem for responsive design
Gitignore Generator
Generate .gitignore for any stack in seconds
Env Validator
Catch .env errors before deployment
Yes. Every tool on this page is 100% free with no subscription, no credit card, and no signup required. All tools will remain free permanently.
No. All processing happens entirely in your web browser using JavaScript. No data is uploaded, transmitted, or stored on any server. Your JSON, passwords, hashes, and code never leave your device.
All tools work in any modern browser including Chrome, Firefox, Safari, and Edge. No plugins or extensions are required. Mobile browsers are also supported.
Once the page is loaded, most tools work without an internet connection since they use browser-native APIs and JavaScript only. However, the initial page load requires internet.
Yes. Since all computation happens in your browser and nothing is sent to servers, tools like the Password Generator, SHA Hash Tool, JWT Decoder, and Env Validator are safe to use with sensitive data.
The JSON Formatter is a free online tool that takes raw or minified JSON and converts it into a human-readable, properly indented format. It also validates JSON syntax and highlights errors with exact line numbers.
The Regex Tester lets you write a regular expression pattern with flags (g, i, m, s) and test it against any input text. Matches are highlighted in real-time, and captured groups are shown in a detail panel.
AiTechWorlds is a technology learning platform focused on AI, programming, and web development. The developer tools section was built to provide the kind of utilities that developers actually need during daily work — tools that are fast, private, and require no account. Every tool in this collection is built with web standards and uses browser-native APIs wherever possible, including the Web Crypto API for cryptographic operations.
New tools are added regularly based on community feedback and common developer workflows. If you have a suggestion for a tool that would be useful, feel free to reach out through the Contact page. All tools are tested across Chrome, Firefox, Safari, and Edge on both desktop and mobile.