devutils online

Developer utilities that respect your privacy. All processing happens locally in your browser.

100% Client-side
Zero Latency
Open Source
Kor/
Popular

JSON Formatter

Format, validate, and minify JSON with real-time syntax checking

Shortcut:⌘J
Popular

Base64 Encoder/Decoder

Encode and decode Base64 strings instantly

Shortcut:⌘B

Cron Expression Builder

Generate and parse cron schedules with human-readable output

Shortcut:⌘C

Privacy First

All data processing happens in your browser. Nothing leaves your machine.

Instant Results

Zero network latency. Process gigabytes of data in milliseconds.

Built for Devs

Keyboard shortcuts, dark mode, and developer-friendly UX out of the box.