DevKitFern

Everyday tools for developers.

Fast, private browser-based tools for developers. Format, convert, generate, test and inspect without sending your data to a server.

Developer tools

JSON Formatter — Format, minify and validate JSON with clear errors. Free, private and processed locally in your browser.
SQL Formatter — Make SQL queries readable across common dialects. Free, private and processed locally in your browser.
Base64 — Encode or decode Base64 text with full UTF-8 support. Free, private and processed locally in your browser.
Timestamp — Convert Unix timestamps and human-readable dates. Free, private and processed locally in your browser.
URL Encoder — Safely encode and decode URL components. Free, private and processed locally in your browser.
UUID Generator — Generate cryptographically random UUID v4 values. Free, private and processed locally in your browser.
Regex Tester — Test JavaScript regular expressions and inspect matches. Free, private and processed locally in your browser.
Cron Tool — Build and explain standard five-field cron schedules. Free, private and processed locally in your browser.
JWT Decoder — Inspect JWT headers, claims, timestamps and signatures. Free, private and processed locally in your browser.
URL Parser — Break a URL into its protocol, host, path and parameters. Free, private and processed locally in your browser.