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.