HEIC to JPG

HEIC decoding depends on the operating system's codecs. Safari on macOS and iOS decodes HEIC natively, and Chrome and Edge on Windows do when the HEIF Image Extension is installed. Where the codec is missing, no client-side tool can decode the file without shipping a multi-megabyte decoder — the page tells you clearly rather than failing silently.

A small amount, since HEIC is more efficient than JPEG at equal quality. At 90% quality the difference is invisible on screen, and the JPG will be noticeably larger than the HEIC.

No. Canvas re-encoding discards EXIF, which means the GPS coordinates in your holiday photos are dropped too. For most people sharing photos that is a feature.

As many as your device's memory allows — a few hundred camera-roll photos is routine on a desktop. They are decoded one at a time and collected into a ZIP, so a long batch does not pile up in memory all at once.

The file is decoded and redrawn inside the page and never sent anywhere; the site has no upload endpoint at all. Camera-roll photos are among the most personal files people convert online, which is precisely why this runs on your device instead of in a server queue.

Yes. There is no account, no daily cap, no file-size tier and no watermark, because there is no server cost to recover. The site is funded by clearly disclosed partner recommendations on the Partners page, never by metering the tools.

No. Everything is processed by JavaScript running in your browser, on your device. You can verify it: open your browser's developer tools, switch to the Network tab, and use the tool. You will see no request carrying your data — because there is nowhere for it to go.