Compress HEIC Images Online

HEIC is already an efficient format - Its HEVC (H.265) compression packs the same visual quality into roughly half the bytes of a JPEG. But iPhone camera defaults prioritise quality, and 48 MP ProRAW-adjacent captures can still weigh 3–8 MB each. Compressing a HEIC re-encodes it at a lower quality setting: higher quality retains more data and produces a larger file; lower quality produces a smaller file with more visible artefacts, particularly in smooth gradients and flat areas.

The practical sweet spot is 70–85% quality. HEVC degrades more gracefully than JPEG, so even fairly aggressive settings hold up well on photographic content. Above 90%, file size grows rapidly for minimal visual gain. Below 60%, softness and smearing become noticeable in fine texture such as hair, foliage, and fabric.

EXIF metadata - Camera model, lens, GPS coordinates, shooting parameters - Adds weight to every photo and, more importantly, reveals exactly where the photo was taken. Stripping it is completely free file-size reduction with zero visual impact, and a sensible privacy step before sharing iPhone photos publicly.

HEIC's adjustable quality comes from HEVC's quantization parameter, the same dial that trades bitrate for fidelity in 4K video streams. When Apple adopted the format in iOS 11 (2017) it tuned the camera encoder to a conservative sweet spot - visually transparent, but nowhere near the format's minimum size - which means most iPhone HEICs still carry 30-60% of removable weight. Unlike JPEG, whose 1992 spec froze the coding tools, HEVC gives the encoder modern tricks: larger prediction blocks, directional intra prediction, and 10-bit precision, so recompressed HEICs degrade far more gracefully than recompressed JPEGs. The catch is generational: every lossy re-encode discards a little more, so compress once, from the original, at the lowest quality your use case tolerates.

HEIC is already one of the most efficient photo formats in mainstream use — but efficient is not the same as small. A 48-megapixel iPhone photo still weighs 3–6 MB, and Live Photo stills, burst frames, and ProRAW-derived exports can be considerably larger. Compressing a HEIC re-encodes it at a lower quality setting, cutting the file size further while keeping the format, dimensions, and HEIC-specific features intact.

The most common motivation is storage. A camera roll of 10,000 photos at 3 MB each occupies 30 GB of iCloud space. Recompressing archives, backups, and shared albums at 80–85% quality typically halves the size again with no visible difference on screen. Compression also helps when a HEIC-aware upload form or messaging platform enforces a per-file size cap that your originals exceed.

Because HEVC compression is so efficient, quality settings behave differently than they do for JPG: an 80% HEIC generally looks noticeably cleaner than an 80% JPG of similar size. For photos you plan to keep editing, store the original untouched and compress only the copies you share or archive — HEIC is a lossy format, and each re-encode discards a little more data.