Developer Tools

Build folder structure diagrams, ASCII directory trees, and file tree visualizations for READMEs and docs.

Generate merged .gitignore rules for your stack with one click.

Convert JSON into TypeScript interfaces with inferred nested types.

Convert titles and phrases into clean SEO-friendly URL slugs.

Build campaign URLs with UTM parameters for analytics tracking.

Validate, format, and minify JSON directly in your browser.

Test regular expressions with live matches and flag controls.

Encode text to Base64 and decode Base64 back to plain text.

Decode JWT headers and payload claims directly in your browser.

Convert CSV or TSV rows into clean Markdown tables for docs.

Convert CSV or TSV rows into JSON objects with instant output.

Convert JSON arrays of objects into CSV rows for spreadsheets.

Compare two texts line by line to spot additions and removals.

Convert text into camelCase, snake_case, kebab-case, and more.

Encode unsafe URL characters and decode percent-encoded strings.

Generate random UUID v4 values in bulk with quick copy actions.

Generate SHA hashes (SHA-1, SHA-256, SHA-384, SHA-512) from text.

Format and minify SQL queries with keyword casing options.

Validate, format, and minify XML with copy-ready output.

Validate, format, and minify YAML with clean indentation.

Validate, format, and minify TOML config text quickly.

Validate, format, and minify INI configuration files.

Validate and normalize CSV with delimiter conversion support.

Translate 5-field cron schedules into plain-English descriptions.

Generate clean branch names from ticket titles and naming conventions.

Search HTTP response codes with meanings and common troubleshooting causes.

Calculate IPv4 network, broadcast, and host ranges from CIDR input.

Convert between binary, octal, decimal, and hexadecimal in real time.

Beautify HTML with proper indentation or minify it to reduce file size.

Upload any image and get the Base64 data URI for embedding in HTML or CSS.

Write Markdown and see the live rendered HTML preview side by side.

Convert text to binary, hex, octal, and decimal — or decode binary back to text.

Full scientific calculator with sin, cos, tan, log, ln, sqrt, powers, and calculation history.

Encode or decode text with a Caesar cipher at any shift value, use ROT13, or brute-force all 26 shifts at once.

Generate SEO meta tags, Open Graph, and Twitter Card HTML tags for your web page with a live copy-ready preview.

Paste any valid JSON and instantly get clean, properly indented YAML output. Supports nested objects, arrays, and all types.

Break any URL into its components — protocol, hostname, port, pathname, query parameters, and fragment hash. Copy any part instantly.

Convert XML to JSON instantly in your browser. Handles attributes, nested elements, and repeated sibling tags as arrays.

Generate realistic fake test data — names, emails, usernames, phone numbers, addresses, UUIDs, and more. Export as TSV or JSON.

Press any key to see its JavaScript event properties: key, code, keyCode, which, and modifier states. Instantly debug keyboard events.

Convert Markdown to clean HTML instantly. Supports headings, bold, italic, links, code blocks, lists, and blockquotes with a live preview.

Encode and decode text using classic ciphers — Vigenère, ROT13, and Atbash. Runs entirely in your browser with no data sent to a server. Swap input and output in one click.

Complete ASCII character table (0–127) with decimal, hexadecimal, octal, and binary values. Search by character, name, or code. Click any printable character to copy it.

Perform bitwise AND, OR, XOR, NOT, left shift, and right shift on two numbers. View the 16-bit binary representation for every result. Supports decimal, binary, and hex input.

Analyze any IPv4 address — view binary representation, IP class, private/public status, subnet mask, and CIDR notation. Perfect for networking and DevOps tasks.

Calculate voltage, current, resistance, or power using Ohm's Law. Enter any two known values — the calculator solves for the remaining quantities with full formula reference.

Minify CSS online — remove comments and whitespace to compress your stylesheet. Paste your CSS and get the minified version instantly with file size stats.

Minify JavaScript online — remove comments and collapse whitespace to reduce file size. Configurable options including console.log removal. Runs in your browser.

Convert HTML to Markdown instantly. Supports headings, links, images, tables, lists, code blocks, blockquotes, bold, and italic. Paste HTML and get clean Markdown output.

Generate a valid robots.txt file for your website. Add user-agent rules, disallow and allow paths, and sitemap URL. Quick presets for common configurations.

Generate a valid XML sitemap for your website. Add URLs with priority and change frequency, bulk-import URLs, and download as sitemap.xml instantly.

Convert SVG to PNG online. Upload an .svg file or paste SVG code, set the output scale, and download a crisp PNG. Runs entirely in your browser.

Convert images between PNG, JPEG, and WebP in your browser. Upload any image, choose output format and quality, and download the converted file instantly.

Create single-elimination tournament brackets online. Add teams, generate the bracket, and click to advance winners round by round. Print or screenshot to save.

Generate custom word search puzzles. Enter your words, choose a grid size (10×10, 15×15, or 20×20), and create a printable word search with horizontal, vertical, and diagonal hidden words.

Add, subtract, and multiply binary numbers, or perform AND, OR, XOR bitwise operations. See results in binary, decimal, and hex with step-by-step working.

Instantly calculate the specificity of any CSS selector. See the (A,B,C) score, compare two selectors, and understand which CSS rule wins.

Preview how your page looks when shared on Twitter/X, Facebook, and LinkedIn. Enter title, description, image URL, and site name to see live social card mockups — no URL fetching needed.

Generate a JSON Schema (Draft 7) from any JSON example. Paste your JSON and get a valid schema with inferred types for objects, arrays, strings, numbers, booleans, and nested structures.

Generate responsive CSS media queries with custom breakpoints. Use Tailwind or Bootstrap presets, switch between mobile-first and desktop-first strategies, and copy the CSS output.

Test JSONPath expressions against JSON data in real time. Query with dot notation, wildcards, array slices, and filter expressions — see matching results highlighted instantly in your browser.

Validate any credit card number using the Luhn algorithm. Instantly detect the card network (Visa, Mastercard, Amex, Discover) and check whether the number passes the checksum. 100% client-side.

Strip HTML tags and convert HTML to clean readable plain text. Options to preserve line breaks, decode HTML entities, and collapse whitespace. Useful for copying web content or cleaning scraped data.

Generate HMAC signatures using SHA-256, SHA-384, or SHA-512 — entirely in your browser.

Generate Base64-encoded Basic Authentication headers from a username and password instantly.

Convert JSON objects to well-formatted XML markup instantly in your browser.

Convert YAML to JSON instantly — paste your YAML and get clean, formatted JSON output.

Parse any user-agent string and extract browser, OS, engine, and device information.

Look up MIME types by file extension or search by content type — a complete reference for developers.

Generate random network port numbers outside the well-known range (1024–65535) for development and testing.

Generate Universally Unique Lexicographically Sortable Identifiers (ULIDs) for time-ordered unique IDs.

Generate RSA public and private key pairs in PEM format directly in your browser using Web Crypto API.

Convert YAML configuration files to TOML format instantly in your browser.

Convert JSON objects to TOML configuration format instantly in your browser.

Convert TOML configuration files to JSON format instantly in your browser.

Convert TOML configuration files to YAML format instantly in your browser.

Generate and verify TOTP one-time passwords for testing multi-factor authentication flows in your browser.

Compare two JSON objects and visually highlight the differences — added, removed, and changed keys.

Quick reference for the most common Git commands — setup, branching, merging, stashing, and more.

Remove all whitespace from JSON to produce the smallest possible output for APIs and storage.

Calculate Unix file permission values — click checkboxes to build chmod values and see the octal and symbolic representations.

Convert docker run commands into docker-compose.yml service definitions instantly.

Convert an IPv4 address to decimal, binary, hexadecimal, and IPv6 representations instantly.

Enter a start and end IPv4 address to get the covering CIDR block, subnet mask, and address count.

Generate random MAC addresses in various formats with optional OUI prefix for network testing.

Generate RFC 4193 IPv6 Unique Local Addresses (ULA) for private networks — fc00::/7 range.

Partially mask a string — like a token, IBAN, or API key — to share it safely without revealing the full value.

Measure and compare the execution time of JavaScript code snippets directly in your browser.

A complete JavaScript regex cheatsheet — anchors, character classes, quantifiers, groups, flags, and common patterns.

Convert any file to Base64 and decode Base64 strings back to downloadable files — entirely in your browser.

Upload a JPEG photo and extract EXIF metadata: camera model, exposure settings, ISO, GPS coordinates, and more — processed entirely in your browser.

Convert CSS properties to Tailwind utility classes instantly. Covers spacing, typography, colors, flexbox, grid, borders, and more — with unsupported properties listed separately.

Instantly identify active user sessions, track online statuses, and monitor device or browser footprints in real time.

Instantly generate precise, mobile-first CSS media queries for responsive layouts, custom breakpoints, and dark mode preferences — completely client-side and ready to copy.

Paste, edit, and preview HTML code instantly with a live browser preview. Test HTML, CSS, layouts, and web components directly in your browser.

Write, edit, and preview HTML and CSS instantly with separate code editors and a live browser preview.

Find your public IPv4 and IPv6 addresses instantly. Free online IP checker with one-click reveal, copy, and refresh.

View, edit, search, sort, and download CSV files online for free.

Explore 1,400+ domain extensions, their meanings, common uses, and essential domain name information.

Explore 330+ HTML tags and attributes with explanations, syntax examples, live previews, and usage tips.

Explore 616 internet and web terms with clear definitions, real-world examples, and interactive explanations.

Explore 319 CSS properties with examples, live previews, editable values, and copy-ready code.

Experiment with 319 CSS properties, edit values, explore live previews, and copy CSS code instantly.

Write and preview GitHub Markdown with live rendering, formatting tools, 10 README templates, and Markdown export.

Create animated CSS loading bars and progress indicators with custom colors, effects, and live previews. Copy ready-to-use HTML, CSS, and JavaScript.

Decode Base64 to PNG, JPG, WebP and more. Preview multiple images and download them as ZIP.