Key takeaways
- 01AVIF is currently the most efficient image format for web delivery, achieving better compression than both WebP and JPG.
- 02AVIF is supported by Chrome 85+, Firefox 93+, Safari 16+, and Edge 121+, covering around 93% of global web traffic.
- 03An adjustable quality slider lets you dial in the perfect balance between file size and visual fidelity.
- 04Conversion runs entirely in your browser — HEIC photos never leave your device.
Why Convert HEIC to AVIF?
AVIF (AV1 Image File Format) is the newest major image format for the web. Based on the AV1 video codec, it typically achieves 50% smaller files than JPG and around 20% smaller than WebP at the same perceived quality. For web developers and performance-conscious publishers, that translates directly to faster page loads and lower bandwidth costs.
The challenge with iPhone photos is that they arrive as HEIC — a format that browsers cannot display natively. Converting to AVIF solves both problems at once: you get a universally-renderable format with best-in-class compression. Handytool makes this conversion available entirely in the browser, so neither your HEIC originals nor your converted AVIFs ever pass through a third-party server.
How to Convert HEIC to AVIF
- 01
Upload your HEIC files
Drop one or more HEIC or HEIF files onto the upload area, or click Choose files to select them. Both .heic and .heif extensions are supported.
- 02
Set the quality level
Use the quality slider to balance file size against sharpness. AVIF's codec handles aggressive compression well — you can often set a lower quality value than you would with JPG and still get excellent-looking results.
- 03
Convert and download
Click Convert. Files are processed in parallel in your browser. Download each AVIF individually or use Download all for the full batch.
When AVIF Is the Best Choice
- 01High-traffic websites where image payload reduction has a measurable impact on performance
- 02Progressive web apps targeting Chrome and Firefox where AVIF support is guaranteed
- 03E-commerce product photography where quality must remain high even at small file sizes
- 04Mobile-first sites serving users on constrained data plans
- 05Developers who already serve WebP and want to take the next step in image optimization
Local Processing — No Server, No Exposure
Handytool's HEIC to AVIF converter decodes your HEIC files and re-encodes them as AVIF entirely within your browser using JavaScript. Your photos are never transmitted to any server, and there is no backend processing involved at all.
This is important when working with client photography, proprietary product images, or any photos with privacy implications. The conversion is genuinely local: even Handytool itself never receives a copy of your images.
HEIC to AVIF FAQ
How do I convert HEIC to AVIF?
Drop your HEIC or HEIF files onto the upload area, set the quality slider, click Convert, then download your AVIF files.
Is AVIF better than WebP?
AVIF generally achieves about 20% better compression than WebP at the same quality. It also has better HDR and wide-color support. The trade-offs are slower encoding and slightly lower browser coverage compared to WebP.
Do all browsers support AVIF?
Most modern ones do: Chrome 85+, Firefox 93+, Safari 16+, and Edge 121+. Global support is around 93%. For older audiences, include a WebP or JPG fallback.
Can I batch convert HEIC files to AVIF?
Yes. Drop as many HEIC files as you like — they all convert in parallel and each appears as an individual AVIF file ready to download.
Are my photos uploaded to a server?
No. Everything runs locally in your browser. Your photos never leave your device.
What quality setting should I use for AVIF?
A quality setting between 60 and 80 is a good starting range. AVIF's codec is very efficient — quality 70 AVIF often looks comparable to quality 85 JPG while being significantly smaller.