File Converters
HEIC to JPG Converter (100% Private, In-Browser)
Convert iPhone HEIC photos to JPG without uploading a single byte. Everything runs locally in your browser — your files never leave your device.
Files never leave your device. All conversion happens in your browser.
%
92% recommended
How this is calculated
HEIC (High Efficiency Image Container) is the default photo format on iPhones since iOS 11. It compresses about 50% smaller than JPG at the same visual quality — but most Windows apps, web uploads, and chat tools still don't support it.
How this works (and why it's private)
CalcLab loads libheif compiled to WebAssembly directly into your browser. When you drop a file, the decode and re-encode run on your device. There is no upload. You can verify by opening DevTools → Network and watching for any request after a conversion — there isn't one.
Quality settings
- 92% (default) — visually identical, ~75% the size of HEIC.
- 80% — web-friendly, ~50% the size.
- 100% — archival quality, ~3× the file size.
Frequently asked
- No. The converter runs 100% in your browser using WebAssembly. Files never leave your device.
- Yes — any modern browser (Chrome, Edge, Firefox, Safari) on any OS. No install required.
- Files are limited only by your device's RAM. We've tested batches of 200 photos at 5 MB each.