Dev Tools Hub

10 free developer utilities — JSON, Base64, JWT, regex and more, all in your browser

{ } JSON Formatter & Validator Beautify, minify and validate JSON with instant error location — free, no upload

⇄ JSON ⇄ CSV Converter Convert JSON arrays to CSV and back, with delimiter options

64 Base64 Encoder / Decoder UTF-8 safe Base64 encoding and decoding for any text

% URL Encoder / Decoder Percent-encode or decode URLs, paths and query parameters

🔑 JWT Decoder Decode JWT header and payload, with exp / iat status checks

⏱ Unix Timestamp Converter Convert between Unix epochs, ISO 8601 and human-readable dates

# UUID Generator Generate RFC 4122 v4 and time-ordered v7 UUIDs in batch

⌗ Hash Calculator Compute MD5, SHA-1 and SHA-256 digests of any text

.* Regex Tester Test JavaScript regex with live match highlighting and capture groups

◐ Color Converter Convert colors between HEX, RGB and HSL with live preview

About AIGoMoon Dev Tools

Ten carefully built utilities for everyday development: format and validate JSON, convert between JSON and CSV, encode Base64 and URLs, decode JWTs, translate timestamps, generate UUIDs, compute hashes, test regular expressions and convert colors. Every tool runs 100% in your browser — no uploads, no accounts, no tracking of your data. Star the tools you use most and they will be waiting for you here on your next visit.