Developer Tools

Developer tools are the small daily utilities that quietly shape how productive you feel: a quick JSON formatter to make an API payload readable, a Base64 encoder for a webhook header, a UUID generator for a test fixture, a JWT decoder to inspect a token claim, a regex tester to validate a pattern before shipping it to production. Instead of bouncing between half-trusted websites that may log your data, this collection gives you 30+ developer utilities that all run entirely in your browser — your code, tokens, and payloads never leave your device.

The tools here cover the work most engineers do every day: formatting and validating JSON, YAML, XML and SQL; encoding and decoding Base64, URL, and HTML entities; hashing with MD5, SHA-256, and bcrypt; generating UUIDs, GUIDs, nano IDs and secure tokens; parsing user agents, URLs, query strings and cron expressions; and converting between binary, hex, decimal and timestamps. Each tool loads in under a second, has no usage cap, and never asks you to sign up. Bookmark the ones you reach for most — they're built so you can chain them together (format JSON, decode a JWT inside it, then hash the result) without leaving the page.