Developer Tools
Formatters, decoders, generators, and testers for everyday development work — JSON, JWT, hashes, regex, UUIDs, and more. Everything runs in your browser, nothing is uploaded.
- JSON Formatter
Free online JSON formatter and validator. Paste JSON to pretty-print, minify, and validate it instantly in your browser — no upload, no signup.
- Base64 Encode/Decode
Encode text to Base64 or decode Base64 back to plain text instantly, free and in your browser. Supports UTF-8 text.
- URL Encode/Decode
Encode text for safe use in URLs (percent-encoding) or decode an encoded URL back to plain text. Free and instant.
- UUID Generator
Generate random UUID v4 identifiers instantly. Create one or many at once, free and in your browser.
- Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text instantly in your browser. Free, no upload required.
- JWT Decoder
Decode a JSON Web Token (JWT) to view its header and payload instantly. Free, client-side, no signature verification data leaves your browser.
- Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and back, in seconds or milliseconds. Free and instant.
- Hex ↔ RGB Converter
Convert hex color codes to RGB and RGB values to hex instantly. Free color converter with live preview.
- Regex Tester
Test regular expressions against sample text and see matches highlighted live. Free, in-browser JavaScript regex tester.
- HTML Minifier
Minify HTML by removing comments, extra whitespace, and line breaks to reduce file size. Free and instant.
- Markdown to HTML
Convert Markdown to HTML instantly in your browser. Supports headings, bold, italics, links, lists, and code blocks.
- XML Formatter
Free online XML formatter and validator. Pretty-print or minify XML and catch syntax errors instantly, entirely in your browser.
- YAML Formatter
Free online YAML formatter and validator. Pretty-print YAML and catch syntax errors instantly, entirely in your browser.
- Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal instantly. Free online base converter.
- Cron Parser
Paste a cron expression to see a plain-English explanation of when it runs. Free online cron parser, no signup.
- QR Code Generator
Generate a QR code from any text or URL instantly, free, and download it as a PNG. Created entirely in your browser.
- Markdown Table
Convert CSV or tab-separated data into a Markdown table instantly. Free, no upload.
- HTML Entity Encoder
Encode or decode HTML entities like & < > instantly. Free, no upload.
- Morse Code Translator
Translate text to Morse code and back, instantly. Free, no upload.
- Text to Binary
Convert text to binary and back, instantly. Free, no upload.
- CSS Minifier
Minify CSS instantly in your browser — strip comments and whitespace to shrink file size. Free, no upload.
- SQL Formatter
Format and pretty-print SQL queries instantly in your browser. Free, no upload.
- cURL Generator
Build a cURL command from a URL, method, headers, and body. Free, instant, runs in your browser.
- HTTP Status Codes
Look up what any HTTP status code means, with category and description. Free, instant.
- CSS Gradient
Build linear and radial CSS gradients visually and copy the generated CSS. Free, instant.
- URL Parser
Break a URL down into protocol, host, path, query parameters, and fragment. Free, instant.
- Semver Calculator
Bump a semantic version number (major, minor, patch) and compare two versions. Free, instant.
- Base32 Encode/Decode
Encode or decode Base32 (RFC 4648) text, entirely in your browser. Free, instant.
- JSON Minifier
Minify JSON by removing all unnecessary whitespace. Free, instant.
- JSON to TS Interface
Generate a TypeScript interface from a JSON object. Free, instant.
- SQL IN Clause
Turn a list of values into a formatted SQL IN clause. Free, instant.
- Random Hex Colors
Generate random hex color codes with a preview swatch. Free, instant.
- HTTP Header Parser
Parse raw HTTP headers into a readable table. Free, instant.
- .env to JSON
Convert .env file content into JSON format. Free, instant.
- UUID Validator
Check whether a string is a valid UUID and see its version. Free, instant.
- Font Converter
Convert fonts between TTF, OTF, and WOFF, entirely in your browser. Free, no upload.