Convert files without uploading them.
Your files never leave your device. Conversion runs right here in your browser — even in airplane mode.
Three steps, zero uploads.
Drop your files
Photos, documents, anything. Drag them in or tap to browse.
Pick a format
Choose the output and, for images, a quality that suits you.
Download
Files convert instantly on your device. Save them or grab a .zip.
A Swiss safe, not a random website.
Most converters upload your bank statements, passports and private photos to a stranger's server. CovertFile can't — because it never asks for them. Don't take our word for it:
Works offline
Turn off Wi-Fi and it still works. No network path means nowhere for your files to go.
Nothing is sent
Open your browser's Network tab while you convert — it stays empty. No servers, no accounts.
No limits
Batch a thousand files or a single one. The only limit is your own device's memory.
Pick a conversion to get started.
Questions, answered.
Do my files get uploaded anywhere?
No. Conversion happens entirely inside your browser, on your own device. There is no server to upload to — you can watch the Network tab stay empty, or switch off Wi-Fi and see it still work.
Is there a file-size or count limit?
No limits. You can convert one file or a whole batch and download them as a .zip. The only real limit is how much memory your device has.
Does it cost anything? Do I need an account?
It's free and there is no signup. No trials, no subscriptions, no cards — and no ads.
Why are my iPhone photos in HEIC?
Apple switched to HEIC because it stores the same photo at roughly half the size of JPG. The trade-off is that many apps and Windows PCs can't open it — which is exactly what a HEIC to JPG conversion fixes.
Will converting reduce my image quality?
Only if you want it to. For lossy formats a quality slider lets you trade size for fidelity, with a before/after preview so you can see the result before you download.