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Supports: HEIC
HEIC (HEIF container with HEVC-encoded image data) became the default iPhone photo format with iOS 11 in September 2017, replacing JPEG on iPhone 7 and later. It is lossy by default and saves roughly half the storage of an equivalent-quality JPEG. PNG, standardized by the W3C in 1996, is lossless, supports full 8-bit alpha transparency, and is supported by every browser, image editor, and OS image viewer in current use. Converting to PNG is the right move whenever you need an iPhone photo to open in software that does not handle HEIC, or when downstream editing requires pixel-perfect input.
| Property | HEIC | PNG | JPG |
|---|---|---|---|
| Compression | Lossy (HEVC); lossless mode exists but rarely used | Lossless (DEFLATE + filtering) | Lossy (DCT) |
| File size (12 MP photo) | ~1.5–2.5 MB | ~10–25 MB | ~3–6 MB at quality 90 |
| Bit depth | 8 / 10 / 12-bit | 1 / 8 / 16-bit per channel | 8-bit only |
| Color model | YCbCr (RGB on decode) | RGB or grayscale, no CMYK | YCbCr / RGB / grayscale |
| Alpha transparency | Supported in spec; iPhone captures opaque | Full 8-bit alpha | Not supported |
| Browser support | Safari 17+; no native support in Chrome/Firefox/Edge | Universal since 1996 | Universal |
| Default container on | iPhone 7+ (iOS 11+) | None — pure image format | Pre-iOS 11 iPhones, most cameras |
| Patent status | Royalty-bearing (HEVC pool) | Royalty-free | Royalty-free since 2007 |
| Preset | When to use | Trade-off |
|---|---|---|
| Very High (default) | Almost always — PNG is lossless so this affects only the HEIC decode path | Slightly slower; largest output |
| High | Batch processing hundreds of photos for web preview | Marginal speed gain |
| Medium / Low | Combined with a Resolution Percentage drop for thumbnails | Visible softening if used at full resolution |
| Color Reduction + Dither (2–256 colors) | Indexed PNG-8 for icons, sprites, or pixel art derived from a photo | Posterization on smooth gradients; much smaller files |
For more aggressive size reduction after conversion, run the result through compress PNG. If file size matters more than pixel-perfect quality, HEIC to JPG typically produces files 3–5x smaller than PNG for the same photo. Going the other direction is PNG to HEIC.
That's expected. HEIC uses HEVC inter-prediction and transform coding to pack a 12 MP photo into roughly 2 MB; PNG stores every pixel losslessly and only deduplicates via DEFLATE, which is much weaker on photographic content. A 2 MB HEIC commonly becomes a 15–25 MB PNG. If size matters, convert to JPG instead, or run the PNG through a compressor afterward.
Yes — the converter writes any alpha plane from the HEIC's auxiliary image item into PNG's alpha channel. In practice, however, iPhone Camera captures are opaque (no alpha), so most HEICs from a phone produce fully opaque PNGs. HEICs exported from editing apps (Procreate, Affinity, Photoshop's "Save As") may include alpha and will retain it.
PNG itself is lossless, so the conversion adds zero compression artifacts on top of the input. The output is a pixel-accurate copy of the decoded HEIC — anything HEVC discarded during the original encode (subtle chroma detail, high-frequency noise) is permanently gone before this tool ever sees the file, but no additional quality is lost.
Only the primary still image is converted. HEIC can store multiple image items (Live Photo motion, burst frames, depth maps, HDR gain maps), but the converter outputs one PNG per file using the cover image. The 3-second Live Photo motion clip (stored as a separate.MOV alongside the HEIC) is not part of the conversion.
8 bits per channel (24-bit RGB or 32-bit RGBA), which is what PNG's most widely supported profile uses. If the source HEIC was 10-bit HDR, the converter tone-maps down to 8-bit during decode; that loses some smooth-gradient precision but ensures the PNG opens correctly in every editor. PNG does support 16-bit per channel, but few tools handle it well.
Windows 10 needs two Microsoft Store extensions: HEIF Image Extensions (free) and HEVC Video Extensions ($0.99, since HEVC is patent-licensed). Many PCs ship with only the first, which is why HEIC photos open as blank previews. Converting to PNG on the web sidesteps both extensions entirely — the decode happens in our pipeline, you download a universally compatible file.
Yes for.heif (same container, different extension). For.heics multi-image sequences only the primary cover image is exported. For full burst extraction you'd typically need a desktop tool like ImageMagick with libheif.
The output PNG carries the timestamp, but PNG's metadata model (tEXt / iTXt chunks) is weaker than HEIC's. EXIF transfer to PNG (including GPS coordinates) depends on the tool and pipeline — some preserve the full EXIF block via PNG's eXIf chunk, others strip it. If sharing photos publicly, verify metadata was stripped before upload, or use HEIC to JPG when you need EXIF preserved reliably (JPEG handles EXIF natively).
Yes, free, no sign-up, no watermark. Files upload over HTTPS, convert, and are auto-deleted from our servers shortly after you download. We do not use them for training or share them with third parties.