Convert WebP to AVIF Online
Turn WebP files into AVIF directly in your browser using ConverterUp. There is no upload, no waiting in a queue, and no account required — your files stay on your device while WebAssembly does the work locally. Adjust quality and dimensions where supported, then download the result. The output keeps the visual fidelity you'd expect from a desktop app while running entirely in the browser tab.
Convert WebP to AVIF nowHow to convert WebP to AVIF
Open the converter
Click the button to open the WebP to AVIF tool. It loads instantly — no install, no signup.
Drop your WebP file
Drag your WebP file into the upload area or click to browse. The file stays in your browser memory only.
Download AVIF
The conversion runs locally and finishes in seconds. Click download to save the AVIF file to your device.
WebP vs AVIF at a glance
Key technical differences between the two formats, so you know what to expect before converting.
| Feature | WebP | AVIF |
|---|---|---|
| Type | Raster image | Raster image |
| Compression | Lossy or lossless | Lossy or lossless |
| Transparency | Full alpha channel | Full alpha channel |
| Animation | Yes | Yes |
| Bit depth | 8 bit/channel | 8, 10, 12 bit/channel |
| Browser support | All modern browsers | All modern browsers |
| Extensions | .webp | .avif |
| MIME type | image/webp | image/avif |
| Introduced | 2010 · Google | 2019 · Alliance for Open Media |
What changes when you convert WebP to AVIF
- AVIF supports both lossy and lossless compression. The converter uses lossy mode by default for smaller files — raise the quality slider if you need the result to stay closer to the original WebP.
- Transparency is preserved: AVIF supports an alpha channel, so transparent backgrounds from WebP stay transparent.
- AVIF supports animation, so animated WebP files can keep their frames and timing.
- AVIF compresses more efficiently than WebP, so the converted file is usually noticeably smaller at similar visual quality.
About WebP
WebP is Google's image format for the web. It supports lossy and lossless compression, alpha transparency and animation in a single format, usually producing smaller files than JPG or PNG.
- Best for
- Website images, e-commerce product photos, animated stickers and anything served to browsers where page speed matters.
- Strengths
- Smaller than JPG/PNG at similar quality, transparency and animation, supported by all modern browsers.
- Limitations
- Some older desktop software, print workflows and upload forms still do not accept it.
About AVIF
AVIF is an image format based on the AV1 video codec, published by the Alliance for Open Media. It offers some of the best compression available, with HDR, wide color gamut and transparency.
- Best for
- High-performance websites, large hero images and photo galleries where every kilobyte counts.
- Strengths
- Very small files at high quality, 10- and 12-bit color, transparency.
- Limitations
- Slower to encode, and support in older browsers and image editors is still incomplete.
Frequently asked questions
Is the WebP to AVIF conversion really free?
Yes. ConverterUp is fully free, with no signup, no watermarks, and no daily quota for the WebP to AVIF converter. We support the project through unobtrusive ads.
Are my WebP files uploaded to a server?
No. Conversion runs in your browser using WebAssembly. The WebP bytes never leave your device, and we have no upload endpoint at all.
What is the maximum file size?
For WebP input, the soft cap is 50 MB for images and 500 MB for video. Practical performance depends on your device's RAM.
Does converting WebP to AVIF reduce quality?
Only if you want it to. AVIF can be lossless or lossy; a high quality setting keeps the result visually identical to the WebP source while still saving space.
What happens to an animated WebP when converted to AVIF?
AVIF supports animation, so frames and timing can be kept — and the file is usually much smaller than the WebP original.
Related guide
PNG vs JPG vs WebP: Which Format to Use WhenRelated conversions
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