If you've ever saved an image from Chrome and ended up with a .avif file that nothing could open, you've encountered the format wars firsthand. AVIF is the newest player in image compression — and it's genuinely impressive. But "impressive" doesn't always mean "use it everywhere."
Here's a practical breakdown of when to use AVIF, when to stick with WebP or JPEG, and how to convert between them without uploading your files to a server.
What Is AVIF?
AVIF (AV1 Image File Format) is an image format derived from the AV1 video codec, developed by the Alliance for Open Media — a consortium that includes Google, Apple, Netflix, and Mozilla.
It's genuinely next-generation:
- ~50% smaller than JPEG at equivalent visual quality
- ~20% smaller than WebP at equivalent visual quality
- Supports HDR, wide color gamut, transparency, and animation
- Completely royalty-free
Netflix uses AVIF for thumbnail images. Google Fonts serves AVIF where supported. The Squoosh team at Google has benchmarked it extensively — the compression gains are real.
Browser Support in 2026
| Browser | AVIF Support |
|---|---|
| Chrome 94+ | ✅ Full |
| Firefox 93+ | ✅ Full |
| Safari 16+ | ✅ Full |
| Edge 94+ | ✅ Full |
| IE | ❌ Never |
Browser support is essentially universal for modern browsers. The problem is everything outside the browser.
Where AVIF Breaks Down
Native OS image viewers: Windows Photos and macOS Preview don't support AVIF natively. Save an AVIF from Chrome on Windows and you get an icon with no preview.
Messaging apps: WhatsApp, KakaoTalk, Telegram — most messaging apps don't handle AVIF. Send an AVIF file and the recipient either can't open it or sees a broken image.
Older image editors: Photoshop added AVIF support relatively recently. Older versions and many non-Adobe editors don't support it.
Email clients: Gmail, Outlook — AVIF in email is largely unsupported.
Format Comparison
| Format | File Size | Quality | Transparency | Animation | Compatibility |
|---|---|---|---|---|---|
| JPEG | Baseline | Good | ❌ | ❌ | Universal |
| PNG | Large | Lossless | ✅ | ❌ | Universal |
| WebP | ~30% < JPEG | Good | ✅ | ✅ | Modern browsers |
| AVIF | ~50% < JPEG | Excellent | ✅ | ✅ | Modern browsers only |
When to Use Each Format
Use JPEG when:
- Maximum compatibility is required (email, messaging, older apps)
- File size matters but you can't guarantee browser support
- You're working with photographs destined for print
Use PNG when:
- You need transparency
- You're working with logos, icons, or screenshots with text
- Lossless quality is non-negotiable
Use WebP when:
- You're serving images on the web and want a safe modern format
- You need transparency without PNG's file size
- You want broad support without worrying about edge cases
Use AVIF when:
- You're optimizing web performance and control the serving environment
- Your analytics confirm your users are on modern browsers
- You can serve fallbacks via
<picture>tag
<picture>
<source srcset="image.avif" type="image/avif">
<source srcset="image.webp" type="image/webp">
<img src="image.jpg" alt="Fallback">
</picture>
Converting AVIF Without Uploading Files
Most online converters require you to upload your file to their servers. For images containing sensitive content — screenshots, documents, personal photos — that's not ideal.
ToolZip's AVIF converter handles conversion entirely in your browser using the Canvas API and the browser's native AVIF decoder. Your file never leaves your device.
Supported conversions:
- AVIF → JPG
- AVIF → PNG
- AVIF → WebP
- JPG/PNG/WebP → AVIF (Chrome 94+ required for encoding)
The encoding direction (to AVIF) requires Chrome 94+ because it uses the browser's built-in AV1 encoder via HTMLCanvasElement.toBlob() with image/avif mime type. Firefox and Safari support decoding but not yet encoding via Canvas.
The Practical Verdict
AVIF is the future. But "the future" means you need a fallback strategy today.
For web performance: serve AVIF with WebP and JPEG fallbacks. For sharing and compatibility: convert to JPEG before sending. For archiving: keep originals as PNG or AVIF, convert on demand.
Convert AVIF files without uploading at toolzip.app/tools/avif-converter
ToolZip — 48 free browser-based tools. Everything runs client-side.