Developer Tools
A small toolbox of things I reach for daily. All client-side unless noted.
SMTP Tester
serverSend a real test email through any SMTP server. Server-side.
JWT Decoder
Decode and inspect JSON Web Tokens. No signature verification.
Base64
Encode or decode Base64 strings, bidirectional.
JSON Formatter
Pretty-print, minify, and validate JSON.
Regex Tester
Test patterns with live highlighting, flags, and capture groups.
Color Converter
HEX ↔ RGB ↔ HSL with live swatch and WCAG contrast scoring.
UUID Generator
Generate v4 UUIDs in bulk.
Hash Generator
SHA-1 / SHA-256 / SHA-512 via Web Crypto.
Timestamp Converter
Unix ↔ ISO 8601 in both directions.