Entirely local
Your file is read by JavaScript running in your browser. It is never sent to a server. We don’t have a server that processes files.
iOS converts HEIC photos to JPEG when you pick from Photos. To convert real HEIC files, save them to the Files app first (tap Share → Save to Files), then pick from Files here. Modime works best on desktop for batch conversions.
Your file is read by JavaScript running in your browser. It is never sent to a server. We don’t have a server that processes files.
We use the same open-source decoder Apple’s Preview is built on, compiled to WebAssembly. It handles modern iPhone HEIC files correctly, including HDR gain maps.
Portrait iPhone photos come out the right way up. Modime parses EXIF orientation before encoding, so JPGs open correctly in every viewer.
Yes. Everything happens in your browser. We don’t have a server that sees your files. You can verify this yourself — open your browser’s Network tab while using the tool. You’ll see zero traffic during conversion.
Those services upload your file to their servers, process it there, and send it back. We skip that entirely. Your files never make the round trip.
After you’ve loaded the page once, yes. Disconnect your internet and try it.
Practically, about 50 files per batch on a modern computer. Larger batches work but may be slow. Individual files can be any size your browser can handle (typically hundreds of MB).
Yes. Modime runs in any modern browser — Chrome, Safari, Firefox, Edge — on any OS.
HEIC is more efficient than JPG — same quality, half the file size. Apple adopted it in 2017. The downside is compatibility: many websites, email clients, and non-Apple devices can’t open HEIC files, which is why you need a converter.
Yes — use HEIC to PDF to combine several HEICs into a single PDF document.