HEIC to JPG

Make JPG copies in three steps

1. Select up to 20 photos, at most 20 MiB each and 100 MiB together. The tool checks the actual container, primary photo and supported color profile rather than trusting the filename.
2. Choose JPEG quality from 1 to 100 and an opaque background for any supported transparency. Select Convert to JPG; each photo is decoded, encoded and checked in order.
3. Inspect the actual JPG preview and download verified results individually or together as a ZIP. Failed or cancelled photos are clearly listed and are not replaced by empty files.

What this conversion keeps and changes

HEIF is a container; this tool supports its documented HEVC still-photo profile. JPG and JPEG name the same output format. AVIF, other codecs and moving-image sequences are not accepted merely because they use a similar container.

The actual primary photo is decoded at full size, with its HEIF crop, rotation and mirror transformations applied once. A thumbnail is never enlarged into your download. Additional top-level photos, video, depth data and HDR gain maps are not exported.

The output is an 8-bit sRGB SDR copy. Supported wide-gamut photos can lose color detail, and JPEG adds compression loss. Unrecognized ICC profiles, untagged photos, HDR primaries and conflicting color information are rejected rather than converted using guessed colors.

The background fills supported transparent pixels before JPEG encoding. It does nothing to an opaque photo. Original camera metadata is not copied, while the picture itself can still contain personal information; this is not a complete privacy-erasure service.

Useful conversion checks

A supported 4032 by 3024 photo with a HEIF quarter-turn becomes a 3024 by 4032 JPG, still 12,192,768 pixels. That is orientation normalization, not resizing or evidence of a particular output file size.

With three selected photos, two supported conversions and one unsupported ICC profile, the result reports two of three converted. The ZIP contains those two verified JPGs only, in selection order, with the same bytes as their individual downloads.

Half-transparent red with alpha byte 128 becomes RGB 255, 127, 127 over white, or 128, 0, 0 over black before JPEG compression. The downloaded JPEG can differ because its encoding is lossy.

Compatibility and resource limits

Support is limited to documented 8- or 10-bit SDR HEVC primary photos or HEVC grids with verified explicit NCLX profiles or recognized SDR sRGB/Display P3 ICC matrix-and-tone-curve profiles. ICC lookup-table/HDR profiles, missing or unsupported color information, HDR primary images, other primary item types, sequences and malformed or warned decodes are rejected. Only the SDR base is exported when a separate HDR gain map is present.

Each photo is limited to 60 million pixels and a 16,384-pixel side. Each JPG is capped at 40 MiB, retained JPGs at 200 MiB and the ZIP at 205 MiB. Native object, tile, metadata and allocation limits also apply; none guarantees browser-wide peak memory or completion.

Native processing has a 60-second deadline, the complete photo 90 seconds and the batch 600 seconds. ZIP generation has its own 60-second deadline. Cancel stops remaining work, but already started host operations and files you downloaded cannot be recalled or forensically erased.

JPEG quality is an encoder setting, not a percent reduction or a promise of identical files across browsers. A JPG may be larger than its HEIC source. HDR, original color profiles, extra photographs, video, camera metadata and original file bytes are not preserved.

Keep the original HEIC when you need its editability, higher dynamic range, metadata or original quality. Browser and source-profile support vary; a conversion failure does not prove that your original photo is damaged.

Local work without a saved photo history

The tool adds no photo upload, saved history or input-bearing share link. Only reviewed static decoder assets may load. Processing buffers and URLs are released best-effort; browser extensions, existing site services, visible image content and downloaded copies are outside any erasure or universal security guarantee.