About Toolmodoom
Free online developer tools — instant, private, and always free.
What is Toolmodoom?
Toolmodoom is a free collection of online utility tools for developers and technical users. Every tool runs entirely in your browser — no server-side processing, no login, no tracking of your data. Available in English and Korean.
Our Tools
- JSON Formatter — Beautify, minify, validate, and repair JSON
- Cron Expression Generator — Generate and validate POSIX & Quartz cron expressions
- JWT Decoder — Decode, inspect, and verify JSON Web Tokens
- Timestamp Decoder — Decode 16 timestamp and time-based ID formats
- Base Encoder/Decoder — Encode and decode Base64, Base32, Hex, Base58, and more
Operating Principles
- Free forever — All tools are free to use. No subscription, no login.
- Privacy first — All processing happens locally in your browser. Your data never leaves your device.
- No clutter — Minimal interface focused on getting the job done quickly.
- Ad-supported — Google AdSense supports the running cost. See our Privacy Policy for details.