Convert PNG images to modern HEIC format online for free. Fast, simple, and secure.
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PNG is lossless and uncompressed-ish — a typical photo PNG is 5-10x larger than the same image as HEIC. Converting PNG to HEIC reduces file size by 60-80% for photographs, but PNG's transparency is preserved as HEIC alpha.
PNG is lossless, which makes it ideal for screenshots and graphics with transparency — but wasteful for photographs. A typical photo PNG is 5-10x larger than the same image as HEIC. If your destination is iPhone, iPad, or Mac, HEIC is the native format: it opens in Photos, Preview, and every Apple app, and syncs seamlessly with iCloud Photos. Converting PNG to HEIC reclaims significant storage while preserving transparency.
| Attribute | PNG | HEIC |
|---|---|---|
| Compression | Lossless (DEFLATE) | Lossy (HEVC) |
| Typical file size | Large (5-10x HEIC) | Small |
| Alpha channel | Supported (8-bit) | Supported (8-bit) |
| Web support | Universal | Safari only |
| Native support | Every OS | iOS 11+, macOS 10.13+ |
| Best for | Logos, screenshots, transparency | Apple ecosystem storage |
| Input format | PNG |
| Output format | HEIC (HEIF container) |
| Codec | HEVC (H.265) |
| Compression | Lossy (HEVC) |
| Transparency | Preserved (8-bit alpha) |
| Typical reduction | 60-80% smaller than source PNG |
| Native support | iOS 11+, macOS High Sierra+ |
| Max file size | 50 MB per file |
| File retention | Auto-deleted after conversion |
The converter decodes the PNG image and re-encodes it as HEIC using HEVC (H.265). For photographs, the reduction is 60-80%. PNG's 8-bit alpha channel is preserved as HEIC's alpha channel, so transparency survives the conversion. EXIF metadata is preserved where present.
HEIC is lossy, so converting PNG to HEIC discards some image data. For photographs, the visual difference on modern screens is not noticeable at 85% quality. For screenshots and text-heavy images, some softening may occur around sharp edges. Screenshots are often better kept as PNG if crisp text matters. For photos, HEIC gives excellent compression with preserved visual quality.
Last reviewed: 2026-10-01