Convert WebP to AVIF
Free, batch, and quick. Quality is chosen for each image from its size and pixel count, so you do not have to guess. Nothing you upload is stored.
Drop your WebP files here
Drag and drop, choose files, or paste from your clipboard.
Up to 20 images at once.
Each image can be 50 MB at most.
JPG · PNG · WebP · AVIF · HEIC — nothing is stored on our servers
WebP vs AVIF
Google's replacement for both JPG and PNG. Typically 25-35% smaller than JPG at matching quality, with transparency support.
Built on the AV1 video codec. The smallest files of the five, often half the size of JPG, at the cost of slower encoding.
| WebP | AVIF | |
|---|---|---|
| Compression | Lossless available | Lossless available |
| Transparency | Yes | Yes |
| Best for | The default for the web today — smaller pages without a visible quality cost. | Squeezing the last bytes out of a page where Core Web Vitals matter. |
| Browser support | Every current browser. | Every current browser; older Safari and Edge builds need a fallback. |
| Extensions | .webp | .avif |
What this conversion actually does
We ran WebP → AVIF through our own engine and measured it. These are the numbers it produced, not estimates.
| Source file | 338 KB |
|---|---|
| After conversion | 301 KB |
| Conversion time | 323 ms |
| Quality chosen | 67 |
File size10.9% smaller
Worth knowing before you convert
- Both WebP and AVIF are lossy, so this re-encodes an image that already lost some detail. The loss is small at our automatic quality, but it does not come back. Keep your original if you may need to convert again later.
1920×1080 reference image · median of 5 runs · libvips 8.16.1 · measured August 28, 2026
Your own file will land somewhere else — a photo, a screenshot and a flat logo compress very differently. What carries over is the direction and the rough scale.
Questions about WebP to AVIF
How do I convert WebP to AVIF?
Drop your WebP files onto the box above, pick a quality level if you want to override the automatic one, and press convert. The AVIF files download straight back to you — a single file on its own, or a ZIP when you convert several at once.
Is converting WebP to AVIF free?
Yes. There is no account, no watermark, and no per-file charge. Conversion runs on our servers, so it does not depend on how fast your own machine is.
Are my files stored anywhere?
No. Files are held in memory only while the conversion runs and are discarded the moment the result is sent back. Nothing is written to disk and nothing is written to a database.
Will the quality drop?
Both formats are lossy, so re-encoding always costs a little. The quality level is picked automatically from the image's size and pixel count so the loss stays below the visible threshold.
Why choose AVIF over WebP?
Built on the AV1 video codec. The smallest files of the five, often half the size of JPG, at the cost of slower encoding. Squeezing the last bytes out of a page where Core Web Vitals matter. Browser support: Every current browser; older Safari and Edge builds need a fallback.