Format guide
What is HEIC?
High Efficiency Image Container (HEIC/HEIF) is Apple’s default High Efficiency Image Container — usually HEVC-compressed photos that keep more detail in less space than JPG, created by MPEG / Apple (HEIF) (2017). iPhone cameras often save HEIC to shrink libraries without looking soft. Great on Apple devices; convert to JPG or PNG before sharing with Windows users, older apps, or websites that only accept JPEG.
HEIC format specifications
- Full name
- High Efficiency Image Container (HEIC/HEIF)
- Kind
- high-efficiency raster image container
- File extension
- .heic, .heif
- MIME type
- image/heic
- Developer / standard
- MPEG / Apple (HEIF) · 2017
- Compression
- HEIF/HEVC based
- Quality model
- Depends on the codec inside the file
- Container
- Yes — may carry multiple codecs
- Common codecs
- HEVC
- Technical sources
- ISO: HEIF (ISO/IEC 23008-12)
- Transparency
- Not supported
- Animation
- No (still / non-animated typical use)
- Typical size
- Often 30–50% smaller than a comparable iPhone JPG
- Browser support
- Limited native display — convert for reliable web use
- Compatibility
- Native on modern iOS/macOS; Windows needs HEIF extensions or conversion; limited on the open web
HEIC compression & quality
Most iPhone HEIC photos use HEVC stills inside HEIF, yielding smaller files than JPEG at similar perceived quality. Efficiency helps libraries; compatibility is the tradeoff outside Apple ecosystems.
Quality: High visual quality at smaller sizes than typical JPG exports
Typical size: Often 30–50% smaller than a comparable iPhone JPG
Transparency & animation
HEIC does not support an alpha channel. Convert to PNG, WebP, AVIF, or SVG when you need transparent backgrounds.
HEIC is a still-media or non-animated format in typical use. Use GIF, APNG, video, or animated WebP when you need motion.
HEIC metadata
Carries rich camera metadata similar to modern photo pipelines (orientation, capture details, and related HEIF features). Convert/export carefully if you need to preserve or strip tags.
Related tools: image metadata viewer · metadata remover
Best use cases for HEIC
- iPhone and iPad camera originals
- Keeping large photo libraries efficient
- AirDrop and iCloud photo workflows
- Archiving phone shots before a JPG share copy
When to avoid HEIC
- Emailing clients on Windows without converting
- Uploading to CMS tools that reject HEIC
- Older digital frames and printers
- Web pages that expect JPG/PNG/WebP
Advantages
- Smaller files than JPG at similar perceived quality
- Supports higher bit depth and advanced HEIF features
- Default on many Apple cameras
- Keeps Live Photo-related container capabilities in the ecosystem
Disadvantages
- Poor out-of-the-box Windows and web compatibility
- Needs conversion for many share targets
- Patent/codec packing can confuse non-Apple tools
- Not ideal as a long-term public web format
Compatibility
Native on modern iOS/macOS; Windows needs HEIF extensions or conversion; limited on the open web
Browsers: Limited native display — convert for reliable web use
Software support
- Apple Photos
- Preview (macOS)
- Image editing apps with HEIF support
- Format Convertly (browser)
Device support
- iPhone, iPad, Mac
- Some Android phones that shoot HEIF
- Windows PCs with HEIF/HEVC codecs installed
How to open HEIC
On iPhone or Mac, open HEIC in Photos or Preview. On Windows, install Microsoft’s HEIF/HEVC extensions or convert to JPG first. Any modern browser can open the JPG/PNG you export.
How to convert HEIC
Use Format Convertly’s HEIC converters in your browser to make JPG or PNG locally — the photo never uploads to a server. Prefer JPG for photo sharing and PNG only when you need lossless pixels for editing.
Popular HEIC conversions
HEIC comparison guides
Compare HEIC with related formats to pick the right container for quality, size, and compatibility.
Best format guides featuring HEIC
Decision pages that cite HEIC — the next hop after a vs comparison.
HEIC how-to guides
Related formats
HEIC tools
Tools extend the format graph beyond one-off conversion — compression, metadata, and utilities for real workflows.
Technical sources
HEIC FAQ
What is a HEIC file?
HEIC is Apple’s default High Efficiency Image Container — usually HEVC-compressed photos that keep more detail in less space than JPG. iPhone cameras often save HEIC to shrink libraries without looking soft. Great on Apple devices; convert to JPG or PNG before sharing with Windows users, older apps, or websites that only accept JPEG.
Is HEIC lossy or lossless?
HEIC is typically lossy (HEIF/HEVC based). That keeps files small but means discarded detail cannot be restored later.
Does HEIC support transparency?
HEIC does not support an alpha channel. Convert to PNG, WebP, AVIF, or SVG when you need transparent backgrounds.
How do I open a HEIC file?
On iPhone or Mac, open HEIC in Photos or Preview. On Windows, install Microsoft’s HEIF/HEVC extensions or convert to JPG first. Any modern browser can open the JPG/PNG you export.
How do I convert HEIC privately?
Use Format Convertly’s HEIC converters in your browser to make JPG or PNG locally — the photo never uploads to a server. Prefer JPG for photo sharing and PNG only when you need lossless pixels for editing. Format Convertly keeps processing in your browser so files are not uploaded to a conversion server.
Why won’t Windows open my iPhone HEIC?
HEIC is native on Apple devices. Windows may need HEIF extensions, or you can convert to JPG for universal sharing.
Should I keep HEIC or convert everything to JPG?
Keep HEIC originals for storage efficiency in your library; export JPG copies when sharing outside Apple ecosystems.
Are my HEIC files uploaded on Format Convertly?
No. HEIC conversion runs in your browser. Files are not sent to Format Convertly servers for processing.