Convert files without
uploading a thing.
Drop a file below — it's converted entirely inside your browser, on your device. No upload, no signup, no limits.
Convert a file
Tap to choose a file — or drop it here
Nothing is uploaded. Your files never leave this browser.
Your private toolkit
Pick a suite — every tool runs on your device.
Popular conversions
Jump straight to the one you need.
HEIC → JPG
Convert HEIC to JPG
PNG → JPG
Convert PNG to JPG
JPG → PNG
Convert JPG to PNG
WEBP → PNG
Convert WEBP to PNG
PNG → WEBP
Convert PNG to WEBP
JPG → WEBP
Convert JPG to WEBP
SVG → PNG
Convert SVG to PNG
GIF → PNG
Convert GIF to PNG
PDF → JPG
Convert PDF to JPG
PDF → PNG
Convert PDF to PNG
JPG → PDF
Convert JPG to PDF
PNG → PDF
Convert PNG to PDF
MP3 → WAV
Convert MP3 to WAV
WAV → MP3
Convert WAV to MP3
M4A → MP3
Convert M4A to MP3
FLAC → MP3
Convert FLAC to MP3
Every format, on your device
No format is ever sent to a server.
Images
Documents
Audio
Why ZeroUpload feels like magic
Nothing is uploaded
Conversion runs in your browser with WebAssembly and Canvas. Your files stay on your device — always.
Instant & unlimited
No queues, no '2 free conversions' walls. There is no server doing the work, so there is nothing to limit.
Runs on your device
The converting happens in your browser, not on a server. Start a conversion, switch off your Wi-Fi, and it still finishes — proof your file never leaves your device. (You only need internet to open the page.)
Frequently asked questions
Is ZeroUpload really free and unlimited?
Yes. No signup, no watermark, no per-file limit. There is no server doing the work, so there is nothing to meter or charge for.
Are my files uploaded anywhere?
No. Every conversion runs inside your browser using WebAssembly and Canvas. Your files never leave your device.
Do I need internet? Is this an offline app?
It's a website, so you need internet to open the page (and the AI tools download a one-time engine). But it is not sending your files anywhere — the converting happens right inside your browser, on your device. In fact, once a page has loaded you can switch off your Wi-Fi mid-conversion and it still finishes. That's our proof that nothing is uploaded — not a way to use it without internet.
What can I convert?
Images (PNG, JPG, WEBP, HEIC, SVG, GIF, BMP), PDF ↔ images, and audio (MP3, WAV, OGG, M4A, FLAC, AAC) — with more tools being added.
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.