Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Home / Text & Data / Unit Converter

Unit Converter

Length, weight, temperature, data, speed and more.

Free, no uploads, no sign-up. Runs 100% in your browser.

How Unit Converter works

Unit Converter runs entirely in your browser. Length, weight, temperature, data, speed and more. Under the hood it uses Plain TypeScript (small, dependency-free code that runs instantly in your tab). Your files are read into this tab’s memory, processed on your own CPU, and handed back to you as a download. Nothing is sent to a server.

How to use Unit Converter

Open Unit Converter and paste your text.
Choose an operation or option.
Review the live result.
Copy it or download it.

Tips

Text never leaves your device, so it is safe for drafts and private notes.

Unit Converter FAQ

Are my files uploaded?: No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
Is it free? Are there limits or watermarks?: Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
Does it work offline?: Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Related tools

Diff Checker: Compare text and code side-by-side or inline.
Time Zone Converter: Convert times across zones, keep a world clock and find meeting times that suit everyone.
Word Counter: Words, characters, sentences, reading time and keyword density.
Case Converter: UPPER, lower, Title, camelCase, snake_case, kebab-case and more.