Convert AVIF to WEBP — Free, Private, In Your Browser
A middle path between two modern formats. WEBP has the longer track record in plugins, apps and older devices, and it stays far lighter than JPG or PNG, which makes it a sensible fallback when AVIF causes trouble.
- 100% Private
- No Upload
- Free Forever
Drop your AVIF here or click to upload
Only AVIF files accepted on this page.
Converting to WEBP…
This is happening on your device — no upload.
How this AVIF to WEBP conversion works
Your browser decodes the AVIF and the page re-encodes it as WEBP at quality 0.92, keeping transparency. Both steps happen in the open tab, and the file is never sent to us. Only the first frame of an animation is used.
Example: AVIF to WEBP in practice
Your image CDN delivers AVIF, but an older gallery plugin or page builder on the same site rejects it. Convert the affected images to WEBP for that one component and keep serving AVIF everywhere else. Visitors with current browsers still get the smallest files on the rest of the site. Before converting a whole library, check whether a plugin update has added AVIF support.
Before you use the new WEBP from your AVIF
- Test the WEBP in the plugin, theme or app that rejected the AVIF.
- Compare the new size with the AVIF to decide whether keeping both versions is worthwhile.
- Check transparent edges against a dark background.
- Clear your CDN or caching plugin afterwards so visitors receive the new WEBP rather than a stored copy.
Why convert AVIF to WEBP?
This is not really a step backwards. AVIF and WEBP are both modern formats, and every current browser displays both. The difference lies in everything around the browser: WEBP has been supported for longer by content management systems, image plugins, email builders, chat apps and older phones that never got updated. If an AVIF breaks somewhere in your workflow, moving it to WEBP usually fixes the problem while keeping a good part of the size advantage, and transparency is preserved. If the image needs to work outside the web entirely, JPG or PNG is still the safer choice.
When AVIF to WEBP is the right call
- A CMS theme, plugin or page builder that handles WEBP but rejects AVIF
- Supporting older phones and browsers that never received AVIF support
- Standardising a mixed image library on one widely supported modern format
- Keeping transparency that a JPG conversion would flatten
AVIF vs WEBP: what changes
| Feature | AVIF | WEBP | In practice |
|---|---|---|---|
| Compression | Lossy/lossless | Lossy here | A second lossy pass; quality 0.92 keeps it light, though the result is not identical. |
| Transparency | Yes (alpha) | Yes (alpha) | Both carry full alpha, so transparent graphics stay transparent. |
| Colour & HDR | 8–12-bit, HDR | 8-bit only | WEBP has no HDR or high-bit-depth mode, so this route always ends in standard colour. |
| Animation | Yes | Yes | Both formats can animate, but this tool converts one frame, so the output is a still. |
| Browsers | All current | All current | Safari added WEBP in 2020 and Edge added AVIF in 2024; WEBP's edge is with outdated devices (caniuse.com/webp, caniuse.com/avif). |
| WordPress | Since 6.5 (2024) | Since 5.8 (2021) | Sites on older WordPress versions or hosts without AVIF support in their image library may reject AVIF uploads. |
Browser support: caniuse.com/webp · caniuse.com/avif
AVIF to WEBP file size: our test
Our test images (results vary by image): a 640×720 photo and a 560×720 text graphic cropped from one of our blog headers, plus our 1696×399 site logo with its transparent background. Sources were AVIFs at quality 50 (libavif, speed 6). Outputs were WEBPs at quality 92, matching what this page produces.
| Test image | AVIF in | WEBP out | Result |
|---|---|---|---|
| Photo, 640×720 | 7.3 KB | 26.8 KB | About 3.7× larger |
| Text graphic, 560×720 | 9.7 KB | 23.4 KB | About 2.4× larger |
| Transparent logo, 1696×399 | 13.4 KB | 37.1 KB | About 2.8× larger, transparency kept |
The WEBP is bigger than the AVIF, as expected, but it compares well with the alternatives. From the same AVIF photo our test produced a 50.1 KB JPG and a 305.7 KB PNG, against 26.8 KB as WEBP. If you need wider support but still care about page weight, WEBP is the lightest fallback.
When not to convert AVIF to WEBP
- When the only reason is browser support. Every current major browser already displays AVIF, so the conversion just costs bytes.
- HDR images you want to keep looking HDR. WEBP cannot store high dynamic range.
- Files for email, print or upload forms. Those usually need JPG, not another web format.
- Converting back and forth between modern formats. Each lossy round removes a little more detail.
AVIF to WEBP FAQ
Is WEBP worse than AVIF?
Slightly less efficient: an AVIF is usually smaller at the same quality. WEBP wins on support in older software and devices, which is the usual reason for making this conversion.
Will the file grow?
Yes. In our test a 7.3 KB AVIF photo became a 26.8 KB WEBP. That is still roughly half the size of the 50.1 KB JPG made from the same file.
Is WEBP still worth using now that browsers support AVIF?
For web pages viewed in up-to-date browsers, AVIF alone is fine. WEBP is still useful as a fallback for older devices and for plugins, apps and services that have not added AVIF support.