Developer Tools
Format JSON, test regex, decode JWTs, generate UUIDs, build QR codes, convert colors, and more. All browser-based — no data leaves your machine.
JSON Formatter
Paste messy JSON, get clean formatted output — with validation and syntax highlighting.
Regex Tester
Write, test, and debug regular expressions — with live match highlighting.
Base64 Encoder/Decoder
Encode and decode Base64 — text or files, instantly in your browser.
URL Encoder/Decoder
Encode special characters in URLs or decode encoded strings back to readable text.
JWT Decoder
Paste a JWT and see its header, payload, and expiration — decoded instantly.
Cron Expression Builder
Build cron schedules visually — see when they run in plain English.
Password Generator
Strong random passwords and passphrases — secure and instant.
UUID & Hash Generator
UUID v4 and cryptographic hashes — generated in your browser.
QR Code Generator
Generate QR codes for URLs, WiFi, text, and email — download as PNG.
Color Converter
HEX, RGB, HSL — pick, convert, and generate palettes instantly.
Epoch Converter
Unix timestamp to date and back — with live epoch clock.