155 tools · Developer Utilities
Developer Utilities tools
Formatters, generators, and regex tools for daily dev work.
Popular in developer utilities
Developer Utilities
JSON Formatter
Paste JSON to beautify, validate, and minify with clear error messages, all in your browser without sign-up—free instant tool for developers.
Developer Utilities
JSON to CSV Converter
Turn JSON arrays into CSV with auto-detected headers and nested field flattening instantly in your browser—free, no-sign-up converter.
Developer Utilities
Base64 Encoder & Decoder
Encode text to base64 or decode base64 back to text. UTF-8 safe. Runs entirely in your browser.
Developer Utilities
URL Encoder & Decoder
Encode URLs for safe links and query strings, or decode them back to readable text. This free, no-download tool handles all percent-encoding tasks in your browser.
Developer Utilities
Regex Tester
Test regex patterns against sample text with live match highlighting and flag support. This free online tool works instantly in your browser with no signup required.
Developer Utilities
Regex Engine Benchmark
Measure your browser's regex performance across 12 patterns with a reproducible methodology. Get instant, downloadable JSON results free online with no signup.
More developer utilities tools
- JSON Parser BenchmarkMeasure JSON parsing performance across 8 cases with throughput in MB/s instantly online—no sign-up, just run in your browser for free.
- Password Hash BenchmarkMeasure PBKDF2 + SHA-256 speed via Web Crypto. Live crack-time estimator at any entropy. OWASP iteration recommendations. Downloadable JSON.
- UUID GeneratorGenerate one or many UUIDs (v4 random or v1 timestamp) instantly online. Copy single or bulk values for free, runs entirely in your browser with no sign-up.
- Markdown to HTML ConverterPaste your Markdown to get clean, structured HTML instantly. Supports tables, code blocks, and task lists — no signup, all conversion happens securely in your browser.
- Password GeneratorGenerate strong random passwords. Choose length, symbols, numbers, and avoid lookalikes. Runs locally.
- Password Breach CheckerCheck if a password has appeared in a known data breach. Uses HaveIBeenPwned k-anonymity — your password never leaves the browser.
- What Is My IPCheck your public IP, approximate city, ISP, and timezone live in your browser with no sign-up or download needed—instant and private.
- QR Code GeneratorGenerate QR codes for URLs, text, WiFi, or email. Customize size and error correction, then download as PNG or SVG. Free and online with no signup needed.
- Hash GeneratorCreate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text or file directly in your browser. Your data never leaves your computer with this free, instant tool.
- CSS MinifierMinify your CSS online instantly by pasting it in to strip comments and whitespace for a smaller file. A free tool that keeps your data safe, no signup.
- JavaScript MinifierShrink JS by stripping comments and whitespace fast in your browser—no accounts, just paste and minify instantly for free, with no sign-up.
- XML FormatterPaste XML to format, indent, and validate it instantly in your browser. Checks syntax and makes messy markup readable — free, no signup, and no uploads required.
- Diff CheckerPaste two blocks of text and see what changed line-by-line. Great for contracts, code, and writing revisions.
- YAML / JSON / TOML ConverterSeamlessly convert between YAML, JSON, and TOML formats instantly. Paste any format to see the other two emit live — a free, private converter with no upload required.
- HTTP Header InspectorAnalyze raw HTTP headers from curl or fetch to get detailed explanations and sensitive data warnings instantly. This free online tool works in your browser with no signup.
- Cubic-Bezier EditorEdit CSS cubic-bezier() easing functions visually by dragging handles and watching a live preview, then copy the result. Free, no signup required.
- Open-Source License ChooserA 4-question decision tree mapping to MIT, Apache, BSD, LGPL, GPL, AGPL, or CC0. Permissions + conditions explained.
- Conventional Commits BuilderFree online builder for Conventional Commits 1.0 messages. Subject validation, breaking-change markers, and issue refs. Browser-only, no sign-up.
- .editorconfig GeneratorBuild a .editorconfig file with Web, Python, or Go presets online. Add per-section overrides and download or copy instantly — no registration needed.
- DNS LookupQuery DNS records for any domain via Cloudflare's DNS-over-HTTPS endpoint. DNSSEC-validated, bypasses local caches.
- My IP AddressLook up your public IP address instantly. Displays your IPv4, IPv6, country, and Cloudflare datacenter. A free, no-sign-up tool ideal for VPN verification.
- HTML MinifierRemove whitespace, comments, and empty attributes from HTML instantly while preserving script and pre content. Use this free browser-only tool with no registration required.
- QR Code DecoderUpload a QR code and decode its contents using your browser's BarcodeDetector API. Files stay on your device — completely free with no signup.
- Screen Resolution SimulatorPreview any URL at iPhone, iPad, MacBook, 1080p, and 4K sizes instantly online. Spot-check responsive design for free without using devtools.
- What Is My BrowserSee your browser engine, OS, screen, viewport, pixel ratio, timezone, CPU threads, network type — everything a site can detect about you.
- Address to Coordinates GeocoderConvert any address, landmark, or place name to precise lat/lng coordinates. Powered by Nominatim / OpenStreetMap. Free, no API key.
- Reverse GeocoderConvert latitude and longitude into a human-readable address using your current location or any pair. Free, instant, and no signup required.
- Email ValidatorValidate email addresses with a three-layer check: syntax, MX record, and disposable blocklist. Get instant results online — free with no sign-up.
- IP Geolocation LookupFind city, ISP, timezone, and ASN from any IP address instantly online—free tool with no sign-up, defaults to your own IP in seconds.
- Mermaid Diagram RendererCreate flowcharts, sequence diagrams, Gantt charts, and more with a live SVG preview and download as SVG or PNG. Free online, no-signup renderer — works instantly.
- Cron Expression ExplainerParse any cron expression into plain English and see the next five scheduled run times instantly. A free online tool with no signup required.
- Markdown Badge GeneratorCreate Shields.io-style README badges with custom labels, colors, and logos. Instantly get Markdown, HTML, and image URLs for your projects — no signup, free online.
- Curl to Fetch ConverterConvert any cURL command to an equivalent JavaScript fetch() call instantly, with support for -X, -H, -d, and basic auth. Free online, no signup.
- JSON Tree ViewerBrowse deep JSON structures interactively. Collapsible nodes, type-coded values (strings, numbers, booleans, null). Pure client-side, no upload.
- Hex to Text ConverterEncode text to hex bytes or decode hex back to text with full UTF-8 and emoji support. A free, instant, client-side tool with no sign-up.
- Base32 Encoder & DecoderRFC 4648 Base32 encode/decode. Same alphabet as TOTP/2FA secrets and URL-safe identifiers. UTF-8 safe.
- YAML LinterLint and validate your YAML files instantly online with precise line and column error messages. Uses the same parser as GitHub Actions — free tool in your browser.
- TOML LinterCheck your Cargo.toml or pyproject.toml for syntax errors instantly using the trusted parser from Rust and Python tooling. Free online, no sign-up.
- Random User GeneratorGenerate plausible fake user profiles for testing with names, emails, and addresses. Filter by nationality and export to JSON or CSV instantly online, no signup.
- Conventional Commit ParserParse Conventional Commits into type, scope, breaking flag, subject, body, and footers. Surfaces style warnings instantly — free online parser, no signup.
- GraphQL FormatterPretty-print or minify any GraphQL query, mutation, or fragment in your browser. Instantly format your code with this free, no-download tool that requires no sign-up.
- Tailwind Class ScannerPaste HTML or JSX and get every unique Tailwind class extracted, grouped by category (layout, spacing, color, etc.). Migration + refactor tool.
- JWT DecoderPaste a JWT — see header, payload, and signature decoded. Client-side only, your token never leaves the browser.
- HTML FormatterFormat messy HTML into clean, indented code or compress it to a minified version instantly. A free, no-sign-up tool that runs safely in your browser.
- SQL FormatterBeautify messy SQL queries with proper indentation and line breaks for SELECT, JOIN, WHERE, GROUP BY. Free online formatter — clean up your code in seconds, no sign‑up.
- Password Strength CheckerCheck how strong a password is — entropy bits, estimated time to crack, and what to improve. Private, offline.
- URL CleanerPaste a URL with utm_*, fbclid, gclid, or ref parameters and instantly get a cleaned link. A privacy-friendly, browser-only tool that requires no registration.
- Color PickerPick colors interactively with HEX, RGB, HSL, and alpha channels. Paste a color to convert or choose from a gradient — free online tool with no signup.
- CSS Gradient GeneratorBuild and preview linear and radial CSS gradients with multiple color stops and custom angles. Copy the clean CSS code instantly with this free online generator.
- Barcode GeneratorGenerate Code 128 or EAN-13 barcodes from any text or number. Download as PNG or SVG — free, no sign-up.
- Favicon GeneratorConvert an uploaded image into favicons in every needed size instantly. Get 16x16 to 512x512 PNGs plus ICO free, no sign-up.
- Meta Tag GeneratorBuild SEO-ready meta tags—title, description, Open Graph, and Twitter Card—and copy the HTML block instantly. A free online generator with no signup required.
- Robots.txt GeneratorGenerate a valid robots.txt for your site with disallow rules, allow overrides, and a sitemap link. Free, instant, and no sign-up required in your browser.
- Open Graph GeneratorBuild Open Graph and Twitter Card tags to make your links render beautifully on Facebook, LinkedIn, X, Slack.
- Keyword Density CheckerPaste an article and see the frequency of each word and 2-3 word phrase. Essential for SEO content optimization.
- Schema Markup GeneratorGenerate valid JSON-LD schema markup for Article, Product, FAQ, and more instantly online. Copy structured data into your head section free, no sign-up.
- FAQ Schema GeneratorCreate valid JSON-LD for Google rich results by entering Q&A pairs. Free instant tool—works in your browser with no sign-up.
- XML to JSON ConverterTransform XML documents to JSON instantly in your browser. Preserves all attributes and nested elements securely on your device — free, fast, and with no signup needed.
- JSON to XML ConverterConvert JSON to well-formed XML with indentation. Control root element name, attribute prefix, and wrapper rules.
- YAML FormatterFormat and validate YAML data instantly in your browser. Catches tab errors and bad anchors while pretty-printing — a free online tool with no downloads needed.
- JSON Diff CheckerFind added, removed, and changed keys across nested objects with a free instant diff tool in your browser—no sign-up, just paste and compare.
- HTML Entity Encoder & DecoderFlip text between raw and escaped HTML entities like & and © in one click. A free, instant converter that keeps your data safe in the browser.
- Cron Expression BuilderBuild a cron schedule visually using a simple form for minutes, hours, and days, then copy the final string. Free, instant, and no sign-up needed.
- Cron Expression ExplainerDecode any cron expression, including Quartz and Jenkins syntax, into plain English with the next five run times. Free online tool, works in seconds.
- HTTP Status Code LookupSearch every HTTP status code, from 200 to 5xx, for plain-English meanings and RFC references instantly. A free, online tool that requires no sign-up to use in seconds.
- MIME Type LookupFind the correct Content-Type for any file extension and vice versa, from images to JSON. A free, no-signup online lookup tool that delivers results in seconds.
- URL ParserParse any URL to instantly see its protocol, host, port, path, query string, and fragment. A free, online tool that works live in your browser with no sign-up.
- Query String ParserParse any URL query string into clear key/value pairs, including repeated keys and arrays. Works instantly in your browser with no registration required.
- Filename CleanerRemove illegal characters, trim length, and collapse spaces to make file names safe on Windows, Mac, and Linux instantly online.
- Line CounterCount total lines, blank lines, comment lines, and code lines in any paste. Great for LOC estimates and log review.
- Box Shadow GeneratorBuild complex CSS box-shadows with a live, instant preview online for free. Adjust offset, blur, spread, and color and copy the rule instantly with no signup.
- Border Radius GeneratorCreate organic CSS border-radius with independent corner controls instantly online. Generate the exact rule or full 8-value shorthand free in your browser.
- CSS Clamp GeneratorGenerate responsive CSS clamp() values for perfectly fluid typography by entering your minimum and maximum screen widths. Free, instant result.
- Flexbox PlaygroundExperiment with justify-content, align-items, and wrap and see live CSS updates. Free instant tool in your browser—no download.
- Grid Layout GeneratorBuild a responsive CSS grid layout visually by defining columns, rows, and gaps. Instantly copy the exact grid-template-areas rule with this free online tool.
- Aspect Ratio CalculatorKeep images and video in proportion — enter width or height, get the matching dimension for any aspect ratio.
- Image Dimensions CheckerDrop any image to instantly see its pixel width, height, aspect ratio, and file size. A free, online tool that keeps everything private in your browser with no signup.
- Contrast CheckerCheck color contrast against WCAG AA and AAA targets for normal and large text. Live preview and pass/fail badges — free online tool with no download.
- Social Media Image SizesCheck up‑to‑date image sizes for Instagram, X, Facebook, LinkedIn, TikTok, and YouTube. Free online cheat sheet covers posts, covers, stories, and thumbnails — no sign‑up.
- Mock Data GeneratorGenerate realistic fake JSON data including users, emails, phones, and addresses. Perfect for testing, demos, and seeding databases instantly in your browser.
- JSON to TypeScript InterfacePaste JSON to get matching TypeScript types with optional and nullable fields in seconds—free online tool, no sign-up or download needed.
- CSS to TailwindConvert any classic CSS rule directly into equivalent Tailwind utility classes for a faster migration. Free online tool, instant conversion, no signup.
- Tailwind to CSSPaste Tailwind class names and get the underlying CSS rules. Useful for emails, PDFs, and non-Tailwind codebases.
- HTML to JSXTransform raw HTML into valid JSX with className objects, self-closing tags, and SVG fixes online. A free, instant converter that runs in your browser with no signup.
- SQL to JSONParse SQL INSERT statements and export rows as JSON. Handles quoted strings, nulls, and numeric types. Free online tool converts instantly in your browser — no sign‑up.
- Gitignore GeneratorGenerate a ready-to-paste .gitignore file for Node, Python, Go, and more. Pick your stack and get the exact template instantly with this free, no-download tool.
- README GeneratorGenerate a clean, GitHub-ready README.md by answering simple questions about your project. This free tool works instantly in your browser with no signup.
- Regex BuilderBuild regular expressions from checkboxes with a live preview against your test text. This free, instant tool works entirely in your browser with no download.
- Discord Timestamp GeneratorPick a date and time, get all Discord timestamp formats (short date, long date, relative). Copy-paste ready.
- Sitemap URL GeneratorGenerate a valid sitemap.xml with changefreq, priority, and lastmod from a URL list instantly online. Get it ready for Google Search Console free, no sign-up.
- JSON Schema GeneratorCreate a draft-07 schema with types and required fields from any JSON instantly in your browser—free tool with no sign-up or download.
- JWT GeneratorCreate HS256/HS384/HS512-signed JWT tokens from a header, payload, and secret. Runs entirely in your browser.
- Env File ParserPaste a .env file to get a validated list of keys and parse errors online. Detects duplicates and bad quoting instantly — free, no sign-up.
- User Agent ParserPaste a User-Agent string to parse out the browser, OS, device, and engine details instantly. A free, no-sign-up tool ideal for log analysis, runs fully in your browser.
- cURL Command BuilderBuild a complex cURL command with headers, auth, and a JSON body using a simple online form. Copy it for instant use, free and no signup.
- Regex to EnglishPaste a regular expression to get an instant, plain-English walkthrough of what it matches, group by group. A free online explainer tool with no signup needed.
- TOML to JSONTransform TOML files into equivalent JSON online instantly. Paste your config and get results with no file upload required, all for free in seconds.
- Dockerfile Lint HelperScan a Dockerfile for common smells — latest tag, no USER, ADD for URLs, secrets in RUN, missing HEALTHCHECK, and more.
- Git Commit Message HelperFree online tool to build conventional-commit messages from type, scope, subject, and body. Paste straight into git commit. No sign-up needed.
- Semver BumperBump a semantic version across major, minor, or patch levels instantly online. See exact changes and pick the right increment for your release free.
- Bash Command ExplainerPaste any bash pipeline — get a plain-English explanation of each command and its flags.
- API Rate Limit CalculatorFree online API rate limit calculator. Enter req/sec, concurrency, and latency to calculate effective throughput and predict when you'll saturate.
- JSON Schema to TypeScriptPaste a JSON sample and generate clean TypeScript interfaces instantly. Free browser-only converter — no signup, no upload, types inferred automatically.
- OpenAPI Endpoint CounterPaste an OpenAPI 3 spec — see paths by method, operation IDs, and count endpoints at a glance.
- HTTP Header ExplainerPaste raw HTTP headers to get plain-English meanings and security implications for Cache-Control, CSP, and HSTS. A free, instant online developer tool with no signup.
- WebSocket Frame ParserDecode raw WebSocket frame bytes — FIN, opcode, mask, payload length, masking key, and unmasked payload.
- Dotenv GeneratorTurn a VAR=value list into a .env file with 32-hex secrets and duplicate detection online. Get instant, free results in seconds with no sign-up.
- Developer Tool Idea ScorerScore your dev-tool idea on 6 weighted criteria — demand signal, distribution path, defensibility, monetization clarity, build cost, founder-market fit.
- CLI DX ChecklistInteractive 16-item checklist for building CLIs developers love — first-run experience, machine-readable output, error handling, trust + safety, distribution.
- GitHub Actions Cost EstimatorEstimate your monthly GitHub Actions spending based on workflow runs and runner type. See free-tier coverage instantly with this free, no sign-up calculator.
- Tech Repair Worth It CalculatorFree online calculator to decide repair vs replace for phones, laptops, TVs, and consoles. Applies the 50% and 75% value rules instantly. No sign-up.
- PX to REM ConverterTransform CSS pixels to rem/em units at any base font-size in your browser instantly. Free online converter with no download or registration needed.
- Iframe GeneratorBuild clean iframe tags with sandbox, lazy-load, and accessibility attributes while previewing live. A free, instant online generator requiring no download or signup.
- Color Palette GeneratorGenerate 5-color harmonious palettes in analogous, complementary, triadic, tetradic, mono, and random modes. Click to copy hex codes instantly, no signup needed.
- CSS Gradient GeneratorBuild complex linear, radial, or conic CSS gradients with multiple color stops and get a live preview. Copy the output instantly, no registration.
- HTML Encoder / DecoderConvert HTML special characters to entities or decode them back in three modes. A free, browser-only tool that works in seconds with no signup needed.
- JSON ValidatorValidate JSON with native browser parser. Errors point to line/column. Reports size, nodes, and max depth.
- Hex to RGB ConverterConvert between hex, RGB, and HSL with alpha support instantly. Copy CSS-ready strings for free in your browser with no sign-up needed.
- Font Pair GeneratorFind curated heading and body font pairings fast and copy the CSS link instantly. Free online tool, no registration needed.
- Color Name FinderFind the closest CSS named colors to any hex value instantly. Free browser-only tool ranks the 5 nearest of 140 CSS named colors — no signup needed.
- Cookie Consent GeneratorGenerate a drop-in HTML + JS cookie consent banner with localStorage persistence and customizable colors. Free online generator — no signup, ready in seconds.
- WhatsApp Button GeneratorDrop-in WhatsApp click-to-chat button. Floating or inline, pre-filled message, official wa.me URLs.
- GitHub Badge GeneratorGenerate custom shields.io badges for your GitHub README in seconds. Customize the label, message, and color instantly with this free, browser-only tool.
- YouTube Embed GeneratorCreate customized YouTube embed codes instantly online. Set autoplay, loop, start time, and muted start with a live preview — completely free with no registration needed.
- Instagram Embed GeneratorCreate official blockquote embeds for Instagram posts and reels with custom width and caption in your browser—free, instant, and no sign-up.
- TikTok Embed GeneratorCreate custom TikTok video embed code using the official pattern. Adjust the width in your browser and get ready-to-paste HTML online for free.
- Facebook Embed GeneratorCreate iframe embed codes for posts, videos, or pages instantly. No SDK required—free online tool in your browser.
- Video Embed GeneratorCreate native HTML5 video embed codes instantly online. Supports self-hosted MP4/WebM with autoplay, loop, and poster controls, free with no sign-up needed.
- SVG Wave GeneratorGenerate smooth SVG wave shapes for hero dividers and decorative footers. Layered, color-tunable.
- CSS Loader GeneratorGenerate a pure-CSS loading spinner with no JavaScript, choosing from 5 tunable styles for color, size, and speed. Free and instant, no signup.
- Social Share Buttons GeneratorGenerate vanilla HTML share buttons for X, Facebook, LinkedIn, Reddit, and WhatsApp. Free online tool — no third‑party SDK or tracking, instant in your browser.
- Markdown PreviewPreview Markdown headings, bold, lists, links, and code sections live as you type. A completely free, no-signup online renderer that works instantly in your browser.
- Color Contrast CheckerCheck color contrast against WCAG 2.x AA and AAA standards. Test foreground vs background instantly online, no signup needed for quick accessibility audits.
- CSS Grid GeneratorBuild a CSS Grid template visually from equal columns to custom tracks, with a live preview. A free online generator that works in your browser.
- JSON VisualizerInteractive tree view of any JSON document. Click to expand/collapse nodes. Useful for exploring API responses.
- CSS Animation GeneratorGenerate custom CSS keyframe animations instantly by tweaking 8 presets for duration, delay, and easing. A free browser-only tool with no signup.
- CSS Button GeneratorGenerate a fully styled CSS button with baked-in hover, active, and focus states. Tune colors and sizing in your browser instantly, no signup.
- HTML Table GeneratorDesign interactive HTML tables by clicking cells to edit headers, stripes, and borders. Get inline-styled output for emails instantly with this free, no-download generator.
- JavaScript MinifierCompress JS code by removing comments and whitespace instantly in your browser—free, no-sign-up tool for quick size reduction before production.
- XML Sitemap GeneratorCreate a sitemap.xml file online instantly from your list of URLs. Auto-sets lastmod today and applies priority with changefreq — free download, no signup needed.
- Color Palette ExtractorExtract dominant colors from any image using histogram analysis, all in your browser. Click swatches to copy hex codes instantly — free tool, no signup.
- .htaccess GeneratorBuild a custom .htaccess file online to enforce HTTPS redirects, Gzip, caching, and hotlink protection. Create error pages and 301 redirects instantly with no download.
- Subnet / CIDR CalculatorCalculate IPv4 subnets from CIDR or dotted mask: network, broadcast, host range, usable hosts, wildcard, binary. Free, browser-only.
- Excel Formula ExplainerPaste any formula and get a plain-English breakdown of 60+ functions online free—no sign-up required, in your browser.
- Chmod CalculatorCalculate Unix file permissions: octal (755, 644) ↔ symbolic (rwxr-xr-x) ↔ rwx checkboxes. Covers setuid, setgid, sticky bit. With presets.
- Htpasswd GeneratorCreate .htpasswd lines for Apache or nginx basic auth with browser-only SHA hashing instantly. Includes config snippets and a free online tool with no registration.
- IPv6 Expander & ShortenerFormat IPv6 addresses to canonical form, handling zone IDs and prefixes, instantly online—free tool with no registration required.
- Test Credit Card NumbersReference table of canonical test card numbers from Stripe, Adyen, and Braintree sandbox docs. Plus Luhn validator + network detector.
- Port Number LookupSearch over 140 well-known TCP and UDP ports by number or service name. Free online reference tool with no sign-up, covering web, mail, DNS, and more.
Guides about developer utilities
Guide · Developer Utilities
How to generate QR codes
Make QR codes for URLs, WiFi, vCard, or text. Learn error correction and sizing, then generate your QR code online free with no sign-up in seconds.
Guide · Developer Utilities
How to create a strong password
Generate a strong password instantly online for free. Build high-entropy passphrases following NIST 2026 rules with no download needed.
Guide · Developer Utilities
How to encode and decode Base64
Understand the 3-to-4 mechanic and 33% overhead for standard, URL-safe, and MIME Base64. Free online reference to avoid common mistakes, no download needed.
Guide · Developer Utilities
How to choose a color palette
Build accessible color palettes using HSL theory, monochromatic to triadic schemes, WCAG contrast checks, and dark mode tips. Free, no-download guide.
Guide · Developer Utilities
How to use JWT tokens securely
Implement secure JWT authentication by choosing RS256, setting expiration, using httpOnly cookies, and preventing 'alg: none' attacks in your browser for free.
Guide · Developer Utilities
How to design a favicon
Create favicons that render perfectly from 16×16 to 512×512 with dark mode support. Learn the right HTML tags and web manifest setup free online.
Guide · Developer Utilities
How to choose between UUID versions
Evaluate UUID v1, v4, v5, and v7 for your database needs. Free, no-signup comparison of structure, performance, and best use cases.
Guide · Developer Utilities
How to minify CSS for web performance
Free guide to CSS minification, gzip vs brotli tradeoffs, bigger wins from purging and critical CSS, build pipelines, and measurement tools online.
Guide · Developer Utilities
How to convert between number bases
Switch between binary, hex, octal, and decimal instantly. Free, no-signup guide with shortcuts for Unix permissions, hex colors, and memory addresses.