WebP to AVIF Converter
Convert WebP to AVIF free — no upload, no signup
To convert WebP to AVIF, drop your WebP images into the box below, click Convert, then Download. Fylo does the work inside your browser, so nothing is uploaded and there's no signup or watermark. AVIF usually saves another 20–30% over WebP at the same visual quality.
Drop images here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
Higher keeps more detail; lower makes smaller files.
Advanced
Leave empty to keep the original size.
How to convert WebP to AVIF
Add your WebP files
Drag and drop WebP files into the box, tap to choose them, or paste with Ctrl+V. You can add many at once.
Check the quality
Leave AVIF quality at the default 60 or adjust the slider — higher keeps more detail, lower makes smaller files.
Convert and download
Click Convert, then download each AVIF or get them all in one ZIP.
Why convert WebP to AVIF?
If your site already serves WebP, AVIF is the next step for squeezing more out of image-heavy pages. It handles gradients, skies and dark scenes better than WebP's older VP8-based compression, reducing banding at small file sizes.
Does converting WebP to AVIF affect quality or size?
Converting between two lossy formats re-compresses the image, so start from the highest-quality WebP you have. AVIF encoding is slower than WebP — a few seconds per large image on a typical laptop. Transparency is preserved; animated WebPs convert from the first frame only.
What's the difference between WebP and AVIF?
WebP is Google's web image format. It supports lossy and lossless compression, transparency and animation, and is typically 25–35% smaller than JPG at similar quality.
AVIF is a modern format based on the AV1 video codec. It often produces files about half the size of JPG with fewer artefacts, and supports transparency and HDR.
Learn more: WebP format guide · AVIF format guide
| Property | WebP | AVIF |
|---|---|---|
| Compression | Lossy (VP8) or lossless (VP8L) | Lossy or lossless (AV1) |
| Transparency | Yes — full 8-bit alpha | Yes — full alpha |
| Animation | Yes | Yes |
| Colour depth | 24-bit + alpha | 8, 10 or 12-bit, HDR |
| Typical size, 12 MP photo | ≈ 1.5–3 MB | ≈ 0.8–1.5 MB |
| Support | All modern browsers (Safari 14+, 2020) | Chrome 85+, Firefox 93+, Safari 16+, Edge 121+ |
| Best for | Website images, e-commerce, blogs | Fast websites, hero images, photo galleries |
| Introduced | 2010 | 2019 |
Frequently asked questions
Is AVIF always smaller than WebP?
Not always, but usually. On photos AVIF tends to be 20–30% smaller at similar quality; on tiny images or simple graphics the difference can be small.
Do all browsers support AVIF?
Chrome, Edge, Firefox, Opera and Safari 16+ do. Very old browsers and some email clients don't, so keep a fallback where it matters.
Are my WebP files uploaded to a server?
No. Fylo converts WebP to AVIF entirely inside your browser using a background Web Worker, so your files never leave your device. That's also why it's fast — there's no upload or download wait.
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