AVIF is the most efficient image format today, based on the AV1 video codec. Files can be 50% smaller than JPG at the same quality, making it the best choice for performance-focused websites. However, AVIF isn't always ideal — especially when you need WebP.
WebP brings the advantage: Modern web format: 25-35% lighter than JPG with same quality, supported by all modern browsers.
With FORMATTO, you can convert AVIF to WebP in seconds. Everything runs 100% on your device — files are never uploaded to any server, so your privacy is guaranteed. Did you know? AVIF can save up to 50% bandwidth compared to JPG — that's why Netflix and YouTube are switching to it.
How to convert AVIF to WebP
- 1Select or drag your AVIF files to the box above (batch supported).
- 2Adjust quality and size as needed, then click "Convert to WebP".
- 3Download results one by one or together as a ZIP. Done — no signup, no upload.
Why your files are safe
100% on device
Files never leave your device.
No trace
Close the tab, data is gone.
Free
Unlimited, no watermark.
Frequently asked questions
How to convert AVIF to WebP?
Just drag your AVIF files to the converter box above, pick your settings, then click convert. The WebP result is ready to download — all processed on your device.
Is FORMATTO really free?
Yes, 100% free with unlimited conversions. Because everything runs in your browser, we have no per-conversion server cost — so it stays free forever.
Are my AVIF files safe?
Very safe. Your files are processed directly on your device and never uploaded to a server. When the page is closed, no trace remains.
How many files can I convert at once?
You can process many files at once (batch). Download them individually or as a single ZIP.
Is AVIF supported by all browsers?
Most modern browsers already support AVIF (Chrome, Firefox, Safari 16.4+, Edge). For maximum reach, provide a WebP or JPG fallback.
Does WebP support transparency?
Yes. Unlike some other formats, WebP supports transparency (alpha channel) so empty areas stay see-through.