The FBI put out a warning in 2025 about free file converter sites that were quietly injecting malware and harvesting the documents people uploaded. That scam only works because normal converters make you upload your file to their server and take the result on faith. FixThatFile is built so there is nothing to take on faith: your file is processed by your own browser, on your own device, and the only thing you can't do here is upload.
Test 1: watch the network (20 seconds)
Your browser has a built-in wiretap, and you should absolutely point it at us.
Open any tool on this site, then press F12 (or right-click the page and choose Inspect) and click the Network tab. Now drop a file into the tool and watch the list. You'll see the page load its fonts, its conversion code, and a Google Analytics ping that counts the visit (that request is about us, never about your file). Then, at the moment your file converts: nothing. No POST request, no upload, no file bytes going anywhere. Run the same experiment on a normal converter site and you'll watch your whole file travel to their server.
Test 2: airplane mode (10 seconds)
Load any tool page, then turn off your Wi-Fi or flip on airplane mode. Now convert something. It works. A site that uploads your files physically cannot do that. This one can, because once the page and its code are in your browser, the internet is no longer involved.
Test 3: read the code
This site is plain, readable static files. View the page source and you can see everything it does; there is no server-side anything, nowhere for a file to be sent, no account system to leak, no database to breach. What loads from the internet is code, fonts, and a visit counter. What never touches the internet is your files.
Why this matters more than a privacy policy
A privacy policy describes what a company intends to do with your data. Architecture decides what it can do. We can't sell, leak, lose, or get subpoenaed for files we never receive. That's the entire idea of this site, and it's why there are no file limits and no queues either: your device does the work, and your device doesn't charge us.