About MaxTools

MaxTools is a growing library of small, focused web tools built for the jobs people do every day: checking compound interest on a savings plan, counting the days until a deadline, converting units for a project, formatting a JSON payload, polishing a piece of writing, or compressing an image before sending it.

Every tool follows the same three rules: it solves one problem properly, it gives you an answer in seconds, and it never asks for your personal information. There are no accounts to create, no files to upload and no data to hand over — all processing happens locally in your own browser.

The site is a one-person project, built in the open and supported by unobtrusive advertising. Being a single small site keeps costs low, which keeps the tools free for everyone. Over time the library will grow toward its goal of 100 tools and beyond.

Found a bug, want a new tool, or have feedback on the design? We read every message — see the contact page. To learn how advertising and cookies work here, read the privacy policy.