High-quality JPG still means lossy JPG
In Privacy mode, the browser JPG encoder uses a 0.92 quality parameter. Cloud mode uses its server-side JPG encoding settings. Neither mode exposes a quality slider here. Both create a newly encoded, lossy JPG rather than an identical copy of the HEIC source.
What happens during high-quality JPEG re-encoding
For HEIC to high quality JPG conversion, the image is decoded and encoded again as JPEG.
At normal viewing sizes, the visual difference may be small, but enlarged detail can reveal changes. HDR, 10-bit, wide-gamut, and source-container information also should not be assumed to survive unchanged.
Privacy mode processes image data directly in your browser without uploading the images. Cloud mode uploads images for server-side processing and deletes uploaded images by default one day later. Both modes retain JPG-supported metadata by default without intentionally stripping it, although HEIC-specific information may not map completely to JPG. The converter does not expose additional quality controls here.
Check the converted JPG before deleting the HEIC
A quick result check matters more than a lossless claim that JPG cannot support.
- Compare image dimensions and orientation.
- Inspect fine detail at the zoom level that matters to you.
- Check color and highlight behavior on important images.
- Verify any EXIF information you still need.
High-quality HEIC to JPG FAQ
Answers about JPEG quality, lossy encoding, and checking converted results.
No. JPG is a lossy format. In Privacy mode, the browser encoder uses a high-quality setting; Cloud mode uses the current server-side JPG settings. In either mode, the result is not lossless, identical to the source, or zero-loss.
Both modes retain metadata supported by JPG by default and do not intentionally strip it, but HEIC-specific fields may not map completely to JPG. Check dimensions, orientation, fine detail, color, and any EXIF information you need before removing the original HEIC file.
PNG can avoid another JPEG-style lossy encoding step for the decoded pixels, but HEIC to PNG still does not preserve every original HEIC container feature.
Privacy mode processes image data directly in your browser and does not upload the images. Cloud mode uploads images for server-side processing; uploaded images are deleted by default one day later. Both modes retain metadata supported by JPG by default and do not intentionally strip it, subject to target-format compatibility.