📱 HEIC to JPG

I dropped a whole camera roll into this myself and winced. It said “1 files converted”, showed four thumbnails and hid the rest, and adding one more photo threw away everything already converted. So now every photo gets its own row with its size before and after and its own download button, new photos join the list instead of wiping it, and anything that fails turns red and says why. There's a Smaller / Balanced / Best quality switch, a button that sends the results straight to the compressor, and — the one I wanted most — the JPGs keep the date each photo was taken, so they land in the right order when you import them. Only the date comes along: the location never does.

Someone sent me the photo that wouldn't convert, and it turned out my converter was the problem. Newer iPhones save HDR photos as a HEIC with a gain map tucked inside, and the decoder I was using — the only one I was using — flatly refuses to read those. So your perfectly good photo came back as "couldn't be converted". There are three decoders now: your browser first (Safari can do this itself, and it's instant), then the old one, then a current build of libheif that reads the HDR files. If all three somehow fail, the page now tells you what each one actually said instead of just shrugging.

Someone told me the page just sat there doing nothing. They were right, and it was my fault twice over: if you picked a photo that wasn't HEIC, the page silently swallowed it, and if a file failed to decode, the Download button was still sitting there doing absolutely nothing when you tapped it. Now it tells you what happened either way — which file it skipped, and why — and the Download button only lights up when there's actually something to download.