Convert HEIC to PNG
Drop HEIC photos from an iPhone and download lossless PNGs that open anywhere. HEIC is space-efficient on the phone but unsupported by many tools; PNG gives you a clean, editable image with no compression artifacts.
PNG works from the pixels in the HEIC, so it cannot add detail, but it adds none of its own loss. Expect a much larger file than the HEIC, since PNG is lossless and HEIC is heavily compressed. For sharing rather than editing, JPEG is smaller.
Privacy: metadata is dropped
Re-encoding from pixels removes the original EXIF, including the GPS location stored in the photo.
Decoding note
HEIC is not a native browser format, so it is decoded by a built-in engine that loads once per tab the first time you convert one.
Batch and privacy
Add multiple photos, convert, and use Download all as ZIP for the whole set. Conversion runs in your browser; nothing is uploaded.