Privacy6 min read

What a converter really means when it says no upload

Apr 22, 2025

You can prove it to yourself. Load the page, turn your wifi off, and convert a statement anyway. Here is why that works and what to check before you trust any tool.

No upload is a claim that is easy to make and easy to test. Load the page, disconnect from the internet, and convert a statement. If it still works, the file was never going to a server, because there was no server to reach.

You can go further and watch the network tab while you convert. A tool that keeps its promise makes no request carrying your file, because the parsing happens entirely in the page.

The reason this one passes both tests is architectural rather than a setting. There is no backend to send anything to, so nothing to trust beyond the code running in front of you.

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