Convert HEIC to AVIF Online Free

Convert HEIC images to AVIF for superior compression, open-standard compatibility, and next-generation web delivery with cutting-edge efficiency.

By ChangeThisFile Team · Last updated: March 2026

Quick Answer

ChangeThisFile converts HEIC to AVIF directly in your browser using the heic2any library. Your image stays on your device and is never uploaded anywhere. AVIF achieves 30-50% smaller file sizes than HEIC with comparable or better visual quality, making it ideal for web delivery and modern applications. Free, instant, and completely private.

Free No signup required Files stay on your device Instant conversion Updated March 2026

Convert HEIC to AVIF

Drop your HEIC file here to convert it instantly

Drag & drop your .heic file here, or click to browse

Convert to AVIF instantly

HEIC vs AVIF: Format Comparison

Key differences between the two formats

Feature	HEIC	AVIF
Compression	HEVC-based (H.265)	AV1-based
File size	30-50% larger than AVIF	Superior compression
Transparency	Yes (alpha channel)	Yes (alpha channel)
Browser support	Safari only	Chrome, Firefox, Safari 16+
License	Proprietary (Apple)	Open standard (royalty-free)
Color depth	10-bit HDR support	10-bit and 12-bit HDR support
Best for	Apple ecosystem storage	Web delivery, cross-platform sharing

When to Convert

Common scenarios where this conversion is useful

Achieving even better compression than HEIC

AVIF delivers 30-50% smaller file sizes than HEIC at the same visual quality. Converting iPhone photos to AVIF maximizes storage efficiency and reduces bandwidth for web delivery or cloud backups.

Converting to an open standard format

HEIC is proprietary to Apple and requires licensing fees for commercial use. AVIF is a royalty-free open standard supported by major tech companies, ensuring long-term compatibility and freedom from patent concerns.

Web optimization with cutting-edge compression

Modern browsers like Chrome, Firefox, and Safari 16+ support AVIF natively. Converting HEIC photos to AVIF enables faster page loads and reduced hosting costs for image-heavy websites.

Future-proofing with next-generation formats

AVIF is built on the AV1 video codec, which is already the industry standard for video streaming. Using AVIF for images aligns with the future of media delivery and ensures compatibility with emerging platforms.

Who Uses This Conversion

Tailored guidance for different workflows

Web Developers

Convert iPhone HEIC photos to AVIF for image-heavy websites with faster load times
Transform user-uploaded HEIC images to AVIF for efficient cloud storage and CDN delivery

Test AVIF support in your target browsers using <picture> elements with JPEG fallbacks

Monitor file size savings: AVIF typically achieves 30-50% smaller files than HEIC at equivalent quality

Photographers

Convert iPhone HEIC photos to AVIF for portfolio websites with minimal bandwidth usage
Batch convert HEIC images to AVIF for client galleries that need to load quickly on mobile devices

Compare the AVIF output at full zoom to verify no visible quality loss from the conversion

Keep original HEIC files as master copies for future editing and re-export

Content Creators

Convert iPhone photos to AVIF for blog posts and articles with faster page speeds
Transform HEIC screenshots to AVIF for social media posts that need to meet file size limits

Use AVIF for web delivery but keep HEIC originals for maximum flexibility

Verify that your content management system supports AVIF uploads before converting in bulk

How to Convert HEIC to AVIF

1

Select your HEIC file

Drag and drop your HEIC image into the converter, or click browse to choose from your files. iPhone photos captured in HEIC format work perfectly.
2

Efficient conversion

The browser decodes your HEIC file and encodes it to AVIF using advanced compression algorithms. The resulting file is 30-50% smaller while preserving visual quality.
3

Download the AVIF

Save your new AVIF file. It's optimized for web delivery, compatible with modern browsers, and ready for sharing or uploading.

Frequently Asked Questions

Is AVIF better quality than HEIC?

AVIF and HEIC offer comparable visual quality, but AVIF achieves 30-50% smaller file sizes at the same quality level. Both support high color depth and transparency. AVIF's superior compression makes it more efficient for web delivery and storage.

Why is AVIF file size smaller than HEIC?

AVIF uses the AV1 codec, which was designed specifically for next-generation compression efficiency. While HEIC relies on HEVC (H.265), AV1's more advanced algorithms deliver smaller files at equivalent visual quality.

Which browsers support AVIF?

AVIF is supported in Chrome 85+, Firefox 93+, Safari 16+, and Edge 121+. Browser support is growing rapidly, making AVIF increasingly viable for web delivery. HEIC, by contrast, only works in Safari.

Can I convert AVIF back to HEIC later?

Yes. You can convert AVIF to HEIC using the same tool. However, converting between any two lossy formats will degrade quality slightly. Keep the original HEIC if you might need to convert back.

Will the image dimensions change?

No. The AVIF will have exactly the same pixel width and height as the original HEIC. No resizing, cropping, or scaling occurs during conversion.

Does AVIF support transparency like HEIC?

Yes. Both HEIC and AVIF support alpha channel transparency. If your HEIC has transparent areas, the AVIF will preserve them perfectly.

Are my files sent to a server?

No. ChangeThisFile processes everything in your browser. Your images are never uploaded or transmitted anywhere. The conversion uses the heic2any library running entirely on your device.

Why convert iPhone photos to AVIF?

iPhones capture photos in HEIC by default, which is efficient but only works well in the Apple ecosystem. Converting to AVIF gives you even better compression, broader browser support, and an open standard format that works everywhere.

Is AVIF royalty-free?

Yes. AVIF is based on the AV1 codec, which is completely royalty-free and open source. HEIC requires licensing fees for commercial use because it relies on the proprietary HEVC codec.

Does AVIF support HDR photos?

Yes. AVIF supports 10-bit and 12-bit color depth, making it excellent for HDR photos. HEIC also supports 10-bit HDR, so HDR content from iPhones converts to AVIF without losing dynamic range.

Can I use AVIF for professional photography?

Yes. AVIF's high color depth, transparency support, and efficient compression make it suitable for professional work. However, for critical archival or editing, consider keeping RAW or lossless originals alongside AVIF for delivery.

How long does conversion take?

Most conversions complete in under 5 seconds. The exact time depends on your device's processing power and the image's resolution. Client-side conversion is instant — no upload or download delays.