DevTools Hub
Fast, client-side developer utilities. No data leaves your browser.
JSON Formatter
Pretty-print, validate and format JSON.
Base64
Encode and decode Base64 strings.
URL Encoder
URL encode/decode and parse components.
JWT Decoder
Inspect JWT header, payload and expiry.
Color Converter
Convert HEX ↔ RGB ↔ HSL instantly.
Regex Tester
Live regex testing with match highlighting.
All tools run entirely in your browser — no data sent to any server.
JSON Formatter
Pretty-print and validate JSON with syntax highlighting.
Base64 Encoder / Decoder
Encode or decode Base64. Supports UTF-8 and URL-safe variant.
URL Encoder / Decoder
Percent-encode strings for safe URL use, or parse a URL into its components.
JWT Decoder
Decode and inspect JSON Web Tokens — header, payload claims, and expiry.
Color Converter
Convert between HEX, RGB, and HSL. Pick a color or type any value.
--color: #7c3aed;
rgba(124, 58, 237, 1)
Regex Tester
Live regular expression testing with match highlighting and capture groups.