Convert WebP to AVIF
Output is typically about 33% smaller.
- Files stay on your device
- No upload, no waiting
- No sign-up, no watermark
This tool is still in development and is not yet listed publicly.
How it works
Add your WebP file
Drag a WebP file onto the drop zone, or click to browse. You can select several at once.
Choose your settings
Adjust the quality slider if you want a smaller file or a sharper result. 80 suits most photographs.
Download the AVIF
Conversion runs on your device as soon as each file is added — no upload, no queue. Download each result when it is ready.
Related tools
All image toolsQuestions
Will converting WebP to AVIF make the file smaller?
Usually, yes. A 12-megapixel photo is around 2.1 MB as WebP and around 1.4 MB as AVIF — about 33% smaller. Because AVIF is lossless the result depends entirely on the image content — flat colour and text compress far better than photographic detail.
Does converting WebP to AVIF lose quality?
A little, by design. WebP is lossless and AVIF is lossy, so some detail is discarded in exchange for a much smaller file. At quality 80–90 the result is visually indistinguishable from the original for photographs. For screenshots, logos or anything with sharp text, stay with a lossless format instead — lossy compression creates visible halos around hard edges.
Is transparency preserved when converting WebP to AVIF?
Yes. Both WebP and AVIF support an alpha channel, so transparent and semi-transparent pixels carry across unchanged — a logo with a cut-out background stays cut out, and soft drop shadows keep their gradient rather than picking up a white halo. Because AVIF can compress lossily, a very hard edge against transparency may pick up slight softness at high compression; keep quality at 85 or above for cut-out graphics.
What happens to an animated WebP?
Only the first frame is converted. Every conversion here decodes one frame onto a canvas and re-encodes it, so the result is always a still image — that applies to AVIF as much as to any other target. To shrink an animation while keeping the motion, a video file (MP4 or WebM) is usually around a tenth of the size of the equivalent WebP, and needs an encoder we do not ship yet.
Should I use AVIF or WebP?
AVIF files are typically 25–35% smaller than WebP at the same quality, which is a real win on image-heavy pages. The trade-offs are much slower encoding and a support floor of Safari 16.4 (March 2023), so a small share of visitors cannot see it. Serve AVIF with a WebP fallback via a <picture> element if you want both.
About webp to avif
WebP and AVIF side by side
| WebP | AVIF | |
|---|---|---|
| Full name | WebP | AV1 Image File Format |
| Compression | Lossy or lossless | Lossy or lossless |
| Transparency | Yes — alpha channel | Yes — alpha channel |
| Animation | Yes | Yes, in the format |
| Browser support | All modern browsers — Chrome 32+, Firefox 65+, Safari 14+ (2020), Edge 18+ | Chrome 85+, Firefox 93+, Safari 16.4+ (March 2023), Edge 121+ |
| Typical 12 MP photo | ~2.1 MB | ~1.4 MB |
| Usually used for | Web images where page weight matters and modern browsers are the audience | Performance-critical web images where every kilobyte counts |
On a typical 12-megapixel phone photo, the AVIF output comes out about 33% smaller than the WebP original. These are order-of-magnitude figures for one kind of image — your own results will vary a great deal, because flat colour, text and line art behave nothing like photographic detail, and the quality slider moves the figure substantially.
What to watch out for
- Encoding is computationally expensive and noticeably slow
- Requires Safari 16.4+ (2023), so a small share of users still miss it
- Sparse support outside browsers — most desktop editors cannot open it
- Animation is lost. Only the first frame is converted — every conversion here decodes a single frame onto a canvas and re-encodes it, so the result is a still image whatever the target format. To shrink an animation and keep the motion, a video file is typically around a tenth of the size of the equivalent WebP.
About the two formats
WebP is the pragmatic modern choice for the web: roughly 25–35% smaller than JPEG at comparable quality, with transparency and animation that JPEG lacks, and — since Safari 14 in 2020 — support in every browser that matters. It is the format to reach for when you want smaller pages without worrying about fallbacks.
AVIF currently produces the smallest files of any widely supported format — commonly half the size of JPEG at the same perceived quality, with excellent handling of gradients and noise. The cost is encoding time, which can be seconds per image rather than milliseconds, and support that only became universal with Safari 16.4 in 2023.
Other conversions
Everything runs on your device — nothing is uploaded, so there is no size limit, no queue and no copy left on a server afterwards. There is more on how browser-based conversion works if you want the detail. Otherwise, browse every image tool, or convert AVIF back to WebP.