What we do
We build small, focused tools for jobs that usually mean handing a file to a stranger's server: converting an image, assembling a PDF, or working out a tank size. Each one is a single page that does its work on your own device.
Why in the browser
Most online converters upload your file, convert it server-side, and hand back a download — which means your document sits on someone else's machine, however briefly. Ours use the browser's own file and image APIs instead:
- Nothing is uploaded. No file ever leaves your device, so there is nothing for us to store, log, or lose.
- No queue and no size cap beyond the memory your device has available.
- It keeps working offline once the page has loaded.
About the calculators
Unit conversions use exact SI-defined factors. The tank and plate calculators use standard geometric formulas and are meant for estimating — check the result against your own drawings and the applicable code before ordering material.
What we don't do
- We don't require an account, and we never charge for a tool.
- We don't store your files, because we never receive them.
- We don't sell personal data. See our privacy policy.
Contact
Missing a converter, or found a result that looks wrong? Tell us on the feedback page and we will take a look.