HEIC vs PNG
A detailed comparison of HEIC Image and PNG Image — file size, quality, compatibility, and which format to choose for your workflow.
Short answer: HEIC is Apple's modern lossy format — designed for photos, ~50% smaller than equivalent PNG, native iPhone format. PNG is the universal lossless format — best for screenshots, graphics, logos, transparency, and anything where pixel-perfect quality matters.
Different purposes. HEIC for photographs (lossy compression, file size matters); PNG for graphics (lossless, universal compatibility). The comparison comes up most often when iPhone users share screenshots that get saved as HEIC by default but should really be PNG for better text sharpness.
HEIC vs PNG at a glance
| Dimension | HEIC | PNG |
|---|---|---|
| Compression | Lossy (HEVC intra-frame) | Lossless (DEFLATE) |
| Designed for | Photographs | Graphics, screenshots, logos |
| File size (12 MP photo) | ~1.5-2 MB | ~10-15 MB |
| File size (1080p screenshot) | ~400 KB (compresses text poorly) | ~280 KB (sharp text) |
| Transparency | ✅ Yes | ✅ Native 8-bit alpha |
| Browser support | Safari ✅, Chrome partial, Firefox ❌ | ✅ Universal |
| Windows native | ⚠️ Requires HEIF extensions | ✅ Universal |
| Bit depth | 8, 10, 16 bit | 8 or 16 bit |
| Best for | Mobile photo libraries | Web graphics, design assets |
When should you use HEIC vs PNG?
HEIC Use when…
- iPhone photo storage — 50% disk savings (iOS handles compatibility automatically)
- AirDrop / iMessage between Apple devices — native format, no conversion
- HDR photography — supports 10-bit / 16-bit depth (PNG limited to 16-bit)
- Photos with wide color (P3) gamut — preserves modern iPhone capture
PNG Use when…
- Screenshots — sharp text, universal browser display
- Logos, icons, graphics with transparency — alpha channel + lossless edges
- UI mockups for design review — pixel-perfect rendering
- Web images — universal browser support, no compatibility issues
- Cross-platform sharing — Windows users without HEIF extensions can't open HEIC
- Print preparation — lossless preservation through workflow
Best format by use case
iPhone photo library
50% smaller than PNG; iOS handles cross-platform.
Winner: HEICScreenshot for blog
Sharp text, universal display, smaller for graphic content.
Winner: PNGLogo with transparency
PNG's alpha is universally supported; HEIC alpha is fragile.
Winner: PNGCloud backup of photos
Cuts cloud storage in half vs PNG.
Winner: HEICEmail screenshot to Windows colleague
PNG renders everywhere; HEIC requires extensions.
Winner: PNGHEIC Image
Raster & Vector ImagesHEIC is the default photo format on Apple devices since iOS 11. It offers roughly 50% better compression than JPEG at similar quality but has limited support outside the Apple ecosystem.
About HEIC filesPNG Image
Raster & Vector ImagesPNG is a lossless image format that supports transparency. It is ideal for graphics, logos, screenshots, and any image where preserving exact pixel data is important.
About PNG filesStrengths Comparison
HEIC Strengths
- Roughly 50% smaller than JPEG at equivalent visual quality.
- 10- and 12-bit color depth supports HDR photography.
- Container format holds depth, Live Photo, bursts, and thumbnails in one file.
- Supports transparency and multi-image sequences.
- Built into iOS, macOS, and most modern Samsung and Google flagships.
PNG Strengths
- Lossless compression — every save preserves the original pixels perfectly.
- Full 8-bit alpha channel for smooth transparency.
- Excellent for text, UI screenshots, logos, and line art.
- Royalty-free and an ISO standard (ISO/IEC 15948).
- Supports 16-bit color depth for high-fidelity work.
Limitations
HEIC Limitations
- Patent-encumbered (HEVC) — Windows users must buy a $0.99 codec pack from the Microsoft Store.
- Not supported by most web browsers or older image editors.
- Sharing to non-Apple platforms usually auto-converts to JPEG, losing metadata.
- Hardware decoding required for smooth performance; software decoding is CPU-heavy.
PNG Limitations
- Much larger than JPEG for photographs (no perceptual compression).
- No native animation in most software (APNG support is inconsistent).
- No CMYK support — web and screen only, not print.
- Metadata capabilities are less rich than JPEG's EXIF.
Technical Specifications
| Specification | HEIC | PNG |
|---|---|---|
| MIME type | image/heic | image/png |
| Compression | HEVC (H.265) intra-frame | Lossless — DEFLATE (zlib) |
| Color depth | 8, 10, or 12 bits per channel | 1, 2, 4, 8 or 16 bits per channel |
| Container | HEIF (ISO/IEC 23008-12) | — |
| Transparency | Supported | Full 8-bit alpha channel |
| Max dimensions | 8,192 × 4,320 (practical) | 2^31 − 1 pixels per side (2.1 billion) |
| Standard | — | ISO/IEC 15948:2004 |
Typical File Sizes
HEIC
- iPhone photo (12 MP) 1.5–3 MB (half of JPEG)
- Live Photo with 3s video 3–6 MB
- Portrait mode with depth map 2–4 MB
PNG
- Icon or small logo 2–20 KB
- UI screenshot (1920×1080) 200–800 KB
- High-res photo (12 MP) 10–30 MB
- Print-ready illustration 5–50 MB
Technical deep dive: HEIC vs PNG
Why iPhones save photos as HEIC instead of PNG
HEIC (High Efficiency Image Container, 2017) is Apple's implementation of the HEIF standard using HEVC video compression for still images. It produces files 40-50% smaller than JPEG at equivalent quality and supports modern features that PNG cannot: HDR (High Dynamic Range), 10-bit and 12-bit color depth, image sequences (Live Photos), depth maps for portrait mode, and image stacks for burst captures.
Apple defaulted iPhone photos to HEIC starting with iOS 11 (2017) for one practical reason: storage. A 12 MP photo is roughly 3 MB as JPEG, 1.5 MB as HEIC, and 15-25 MB as PNG. For a phone with thousands of photos, the difference is gigabytes saved.
PNG (1996) sits at the opposite end of the spectrum: lossless compression, alpha transparency, universal compatibility from the late 90s onward, but file sizes 5-10× larger than HEIC for photographic content.
When you actually need to convert HEIC to PNG
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Editing in software that doesn't read HEIC: older Photoshop versions (pre-2022), legacy Windows tools, GIMP without plugins, most server-side image processing pipelines.
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Web upload requirements: many CMS platforms, e-commerce backends, and form submissions reject HEIC. Convert to PNG (or JPEG/WebP) before uploading.
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Adding alpha transparency: HEIC supports alpha but most viewers ignore it. Converting to PNG preserves transparency for icon design, screenshots with transparent backgrounds, or compositing workflows.
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Long-term archival: HEIC's universal support is improving but PNG has 30 years of guaranteed compatibility. For master copies you'll keep for decades, PNG (or its modern lossless cousin WebP-lossless) is safer.
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Sharing with non-Apple users: Windows opens HEIC only via the (paid) HEIF Image Extensions. Android support is patchy. PNG works everywhere without configuration.
The hidden cost: file size explosion
Converting HEIC to PNG typically multiplies file size by 5-10×. A 2 MB iPhone HEIC photo becomes a 10-20 MB PNG. This isn't a flaw in PNG — it's a fundamental tradeoff. PNG stores every pixel exactly; HEIC throws away imperceptible detail in exchange for massive size savings.
For photographic content shared on the web, JPEG or WebP is almost always the better choice than PNG. Reserve PNG → HEIC conversion for cases where you genuinely need lossless preservation or alpha transparency.
When PNG → HEIC makes sense
The reverse conversion (PNG → HEIC) is rarer but valid when:
- You're archiving large quantities of photographic PNGs and want to reclaim disk space.
- You're preparing images specifically for Apple ecosystem display (iCloud Photos, Apple Photos library, AirDrop to iPhone).
- You need HDR or 10-bit color preservation that PNG can store but inefficiently.
For screenshots, icons, logos, or any image with sharp edges and few colors, PNG remains the better format and converting to HEIC saves little space while losing universal compatibility.
Conversion under the hood
KaijuConverter's HEIC ↔ PNG pipeline uses libheif (HEIC reading) and libpng (PNG writing) through ImageMagick. Conversion preserves:
- Color profiles: ICC profile embedded in HEIC carried over to PNG.
- EXIF metadata: camera info, GPS coordinates, timestamps preserved.
- Bit depth: 8-bit HEIC → 8-bit PNG; 10-bit HEIC → 16-bit PNG (closest standard).
- Alpha channel: if HEIC has transparency, PNG-RGBA preserves it.
- Live Photo motion: dropped (PNG cannot represent motion sequences).
For batch conversions of an iPhone Photos library, KaijuConverter processes multiple HEIC files in parallel and ZIPs the PNG outputs for single download.
Ready to convert?
Convert between HEIC and PNG online, free, and without installing anything. Encrypted upload, automatic deletion after 60 minutes.
Frequently Asked Questions
iOS 11+ defaults to HEIC because it produces files 40-50% smaller than JPEG at equivalent quality, supports HDR and Live Photos, and uses Apple's preferred codec. You can change this in Settings → Camera → Formats → Most Compatible to force JPEG output.
JPEG (or WebP for modern sites) is almost always better than PNG for photographic content shared on the web. PNG produces files 5-10× larger than JPEG with no visible quality benefit for photos. Use PNG only when you need transparency or lossless preservation.
No, PNG is lossless so the conversion preserves every pixel that HEIC stored. However HEIC is itself a lossy format, so any compression artifacts present in the HEIC will be preserved in the PNG. The file just becomes 5-10× larger.
Windows 10/11 can open HEIC if you install the HEIF Image Extensions from Microsoft Store (free) plus HEVC Video Extensions (paid, ~$1). Without these, double-clicking a HEIC shows an error. Converting to PNG/JPEG bypasses this dependency entirely.
Yes. PNG is a still image format and cannot represent motion sequences. The Live Photo motion data is dropped during conversion, leaving only the still keyframe. To preserve motion, export Live Photos as MP4 instead.
Rarely. HEIC excels at compressing photographic content but offers little savings for graphics, screenshots, icons, or logos. The reverse direction (HEIC → PNG) is more common when you need universal compatibility or want to add/edit alpha transparency.
HEIC (High Efficiency Image Container) is the default photo format on iPhones since iOS 11, based on the HEVC video codec. It offers roughly 50% smaller files than JPEG while maintaining superior image quality and supporting depth maps and Live Photos.
HEIC files open natively on Apple devices, Windows 10/11 (with the HEIF extension from the Microsoft Store), and modern versions of GIMP and Photoshop. Google Photos also supports HEIC viewing and conversion.