Private file tools

Convert your files — and never let them leave the cabin.

Free, instant file conversion that runs entirely on your device. No upload, no sign-up, no limits — your files stay with you.

Convert HEIC to JPG Browse all tools
✓ Nothing uploaded ✓ No sign-up ✓ Works offline ✓ Unlimited & free

How it works

1. Drop a file. It loads straight into this browser tab — not onto a server somewhere.

2. Convert on your device. Open-source engines (libheif, FFmpeg, pdf-lib) run locally to do the work, the same tools the big sites run on their servers.

3. Download. Your converted file appears instantly. Nothing was uploaded, so there's nothing to delete or trust us with later.

Why "no upload" matters

Most online converters — the ones that top the search results — work by uploading your file to their servers, processing it there, and asking you to trust their retention policy. That's also why their free tiers are capped: server time costs money. ConvertCabin flips that around. The conversion happens on your machine, so your documents and photos never travel anywhere, there's no queue, no daily limit, and no account. If you're curious, open your browser's developer tools and watch the network tab while you convert — you'll see the file data never leaves.

Common questions

Is it safe to use ConvertCabin?
Yes — and you can verify it. Conversions run inside your browser on your own device, so your files are never uploaded. Open your browser's network tab while converting and you'll see no file data leaving your machine.
Is it really free, with no sign-up?
It's free with no account and no daily limit. Because the work happens on your device rather than our servers, there's no processing cost to ration — so there's nothing to pay for or sign up to.
Do my files get uploaded anywhere?
No. The only thing your browser downloads is the converter code; your files stay on your device the whole time, and the tools keep working even if you go offline.