Convert files without
uploading a thing.
ZeroUpload converts your files entirely inside your browser. No upload, no signup, no limits — and it even works offline. Your files never leave your device.
Popular conversions
Pick a conversion — every one runs on your device.
Why ZeroUpload feels like magic
Nothing is uploaded
Conversion runs in your browser using WebAssembly and Canvas. Your files stay on your device — always.
Instant & unlimited
No queues, no '2 free conversions' walls. Because there is no server doing the work, there is nothing to limit.
Works offline
Once the page loads you can disconnect the internet and it still converts. Try it — that's the proof it's private.
Your files are nobody's business.
Other converters upload your private photos and documents to their servers. We think that's absurd. ZeroUpload was built on one rule: your files never leave your device. No exceptions, no fine print.