HEIC to AVIF — Convert iPhone Photos to Modern Web Format
Convert HEIC to AVIF for web-optimized iPhone photos. Maintain high quality at dramatically smaller file sizes.
Drop HEIC files here or click to select
.heic, .heif (multiple files)
Settings
Files
Converting...
Preparing...
Format comparison
HEIC (High Efficiency Image Container) is a high-efficiency photo format commonly used on iPhone and iPad. It often produces smaller files, but compatibility varies across apps and platforms.
Pros
- ✓ Efficient compression for photos
- ✓ HEIF container features (metadata, sequences)
- ✓ Common default on Apple devices
Cons
- ✗ Compatibility can be limited in some apps/browsers
- ✗ May require extra codecs on some platforms (e.g., Windows)
AVIF (AV1 Image File Format) is a modern image format that targets high compression efficiency while preserving quality. Depending on the environment, encoding/decoding can feel heavier than older formats.
Pros
- ✓ Strong compression efficiency
- ✓ Can support HDR / wide color in supported pipelines
- ✓ Transparency support
Cons
- ✗ Slow encoding
- ✗ Limited browser support
When to Convert HEIC to AVIF
Convert HEIC to AVIF for next-gen web delivery. Useful when your target environment supports AVIF and you want smaller files.
Technical Format Details
HEIC Technical Specifications
Technical details
HEIC/HEIF is commonly used for photos on iPhone and iPad. It can keep file sizes smaller, but compatibility varies across Windows, browsers, and editing tools.
Good for
- On-device photo storage: Efficient photo saving- Keeping metadata: Managing capture info alongside the image
Notes
- Compatibility: You may need JPEG/PNG/WebP for sharing and uploads- Environment differences: Decoding and conversion behavior depends on browser/platform support
Reference: Apple: HEIF/HEVC
AVIF Technical Specifications
Technical details
AVIF is a modern image format often used for web optimization. It can be very efficient for photos, but performance and support vary across browsers and apps.
Good for
- Web delivery: Smaller files on supported platforms- Photos: Keeping quality while reducing size
Notes
- Performance: Encoding/decoding can feel heavier (split large batches when needed)- Compatibility: Not every environment can open AVIF — keep WebP/JPEG fallbacks if required
Reference: AOM: AVIF Specification
How to Use
Add files
Drop or click to select your HEIC files (multiple supported)
Confirm output
Default is AVIF. You can change to another supported output format if needed.
Adjust options
Set quality, resize, and metadata options only if you need them.
Convert & download
Download each file, or download everything as a ZIP for batch outputs.
FAQ
Which is better, HEIC or AVIF?
Depends on the use case. HEIC is great for device storage; AVIF is better for web publishing with broader browser support.
Can't I use iPhone photos directly on the web?
HEIC has limited browser support. Converting to AVIF enables display on Chrome, Firefox, and Safari.
How does file size change?
HEIC and AVIF have similar efficiency, so file sizes are roughly comparable. AVIF has better web compatibility.
Will converting reduce image quality?
It depends on the output format. PNG is lossless, so quality stays the same. Lossy formats like JPEG/WebP/AVIF/JXL can change file size and appearance depending on the quality setting. Always verify with the final output before publishing.
Can I keep Exif metadata?
When "Keep Exif/Metadata" is ON, we try to carry over things like capture time, camera info, and GPS where possible. Some tags may be dropped depending on the input, output format, and browser environment. Turn it OFF if you want to remove location data before sharing.
Can I convert multiple files at once?
Yes. You can select multiple files, convert them in one run, and download each file individually. For multiple outputs, you can also download everything as a ZIP. For very large batches, splitting into smaller runs is more stable.
Are my images uploaded to a server?
No. Conversion runs locally in your browser, and your images are not sent to an external server.
What if conversion fails or is slow?
Some formats (like HEIC/HEIF) depend on browser support. If it fails, try another browser, reduce the number of files, or resize before converting.
References
- Apple: HEIF/HEVC
Official operational reference for HEIC/HEIF behavior.
- W3C: PNG 3rd Edition
Official PNG/APNG specification reference.
- AOM: AVIF Specification
Normative AVIF container and coding behavior.
- JPEG Committee
Primary standards source for JPEG and JPEG XL.
- Google Developers: WebP
Reference for WebP encoding and support behavior.
More Tools
EXIF Remover (GPS & Date Taken)
Remove photo metadata like GPS and date taken before sharing. (HEIC/JXL supported)
Image Converter & Compressor (HEIC/WebP/AVIF/JXL)
Convert to JPEG/PNG/WebP/AVIF/JXL with quality control, plus format-specific pages for common pairs.
Character Counter (Lines & Bytes)
Count characters, lines, and bytes in real time — great for posts and drafts.
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