Is It Safe to Use Online Image Converters? What Happens to Your Files
"Free online converter" can mean "we process your file on our server." For a meme that's fine. For anything private, it's worth understanding exactly where your image goes.
What an upload-based converter does
An upload-based converter makes a round trip: your browser uploads the file to the company’s server, the server converts it, and sends the result back. The conversion feels quick, but in those seconds your file has left your device, crossed the internet, and may have been written to disk on a machine you can’t see.
Many services say they delete uploads after a set time, sometimes within a day. But “after a while” is a policy you’re trusting, not a guarantee you can verify — and any server that stores files can be breached.
The risks
- Retention you can’t confirm. You’re trusting an unverifiable deletion schedule.
- Breaches. Any stored file is a file that can leak if the server is compromised.
- Sensitive content. Medical scans, IDs, contracts, and unreleased work are the files where this matters most.
How to tell whether a converter uploads your file
Look for one specific claim: that processing happens in your browser (client-side), not on a server. A tool that works locally keeps working if you disconnect from the internet once the page and tool have loaded — a quick way to test it. If a tool shows a progress bar that says “uploading,” your file is leaving your device.
Every image tool on this site runs in your browser, so your images are not uploaded to us. To check, open a tool, switch off your network and convert a file — it still works.
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