Good to know
The decoder loads once from a CDN (a few MB), then works locally — your photo itself is never uploaded, which is more than most HEIC sites can say. Decoding a large 48 MP photo can take several seconds on a phone. Some very new HEIC variants (10-bit/HDR captures) are not supported by browser decoders; if one fails, your iPhone can re-export it: open the photo, Share → Save as File, or set Settings → Camera → Formats to "Most Compatible" for future photos.
Frequently Asked Questions
Does the JPG keep the photo quality?
At the default 92% quality, visually yes. HEIC stores a bit more dynamic range than JPG can hold, so extreme HDR shots may look slightly flatter.
Can I convert many photos at once?
This page converts one at a time to keep phone memory safe. For a whole album, your iPhone's Files app or a desktop tool is the practical route.
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