Achetez un café à MJJ Tools

Hi, I’m the independent maker behind MJJ Tools.

I build practical web tools that solve small but real problems: formatting JSON, converting files, calculating values, translating text, generating data, checking code, and many other daily tasks. I started MJJ Tools because I often needed simple online utilities that were fast, clean, free, and respectful of privacy.

I’m continuously improving the site, adding new tools, fixing bugs, and making the experience better for users around the world. If MJJ Tools saves you time, a coffee is a lovely way to support the work and help the project keep growing.