About DevToolBox

DevToolBox is a free collection of utilities for software developers. Every tool runs entirely in your browser — nothing is uploaded to a server.

Mission

We believe developer utilities should be instant, trustworthy, and private. No sign-up, no account, no tracking of your input.

What's inside

JSON Formatter — format, minify, validate, and explore JSON with a tree view
Base64 Encode / Decode — convert text to Base64 and back, with full Unicode support
URL Encoder / Decoder — encode and decode URLs and query-string parameters
Regex Tester — test regular expressions with real-time match highlighting
Timestamp Converter — convert between Unix timestamps and human-readable dates

Contact

Suggestions, bug reports, or partnerships? Email us at contact@zhujiuyin.com.