Convert AVIF to WebP

Free, unlimited AVIF to WebP conversion that runs inside your browser. Your files never leave your device. Every conversion runs locally in your browser.

No upload · No sign-up · No file limit

Choose AVIF files or drop them here

Processed on your device · never uploaded · no limit

Quality 90%

This converter needs JavaScript, because the conversion runs on your device rather than on a server.

Both formats are modern and web-oriented, so this conversion is about compatibility rather than quality. WebP has been supported for considerably longer and is accepted by many platforms and CMSes that still reject AVIF uploads. Files will grow modestly, since AVIF compresses better, but transparency and reasonable file sizes both survive.

How to convert AVIF to WebP

Select your AVIF files. Click "Choose AVIF files" or drag them onto the box above. You can select as many as you like at once.
Wait for the conversion. Each file is converted to WebP on your own device. Nothing is uploaded, so it finishes as fast as your hardware allows.
Download the results. Download files individually, or take them all at once as a single ZIP archive.

AVIF vs WebP

	AVIF	WebP
Full name	AV1 Image File Format	Web Picture format
Introduced	2019	2010
Compression	Lossy or lossless	Lossy or lossless
Transparency	Yes	Yes
Animation	Yes	Yes
Extensions	.avif	.webp

About AVIF files

AVIF applies the AV1 video codec to still images and currently achieves the best compression of any widely-deployed format, often half the size of a JPG at comparable quality. It also handles transparency, animation, HDR, and wide colour gamut. The catch is reach: browser support is good, but support outside the browser is thin, which is exactly why people convert AVIF files back to JPG or PNG.

Where they come from: Images saved from modern, performance-focused websites.

Drawbacks of AVIF

Very limited support in desktop and mobile applications
Slow to encode compared with JPG or WebP

Why convert to WebP?

WebP was released by Google in 2010 to cut image weight on the web, and it does: it typically produces files 25–35% smaller than an equivalent-quality JPG. It supports both lossy and lossless modes, full transparency, and animation, making it the one format that covers everything JPG, PNG, and GIF do individually. Its weakness is not technical but social — plenty of desktop software still refuses to open it.

Substantially smaller than JPG at matching quality
Handles transparency and animation
Supported by every current browser

Support: All modern browsers. Poor support outside the browser.

Common questions

Are my files uploaded to a server?

No. The conversion runs entirely inside your browser using your own device’s processor. Your AVIF file is never transmitted, never stored, and never seen by us — you can disconnect from the internet after the page loads and it will still work.

Is there a file size or daily limit?

There is no daily limit and no account required. Because your device does the work rather than our server, we have no per-conversion cost to recover. The practical ceiling is your device's available memory — very large files on older phones may fail, in which case convert them in smaller batches.

Can I convert several AVIF files at once?

Yes. Select or drop as many AVIF files as you like and they are converted one after another, then offered as individual downloads or a single ZIP.

Why can I not open AVIF files in my photo editor?

AVIF is a web-first format. Browsers all support it, but a great deal of desktop software — including older versions of Photoshop and most default photo viewers — has never added support. WebP is understood everywhere.