AVIF to WebP Converter

Your pictures are in AVIF, but a tool, plugin or older browser you rely on handles WebP better. WebP is a close relative in purpose: small files for the web, with transparency. This page converts AVIF to WebP in your browser tab, with a quality slider and a resize option, and your files never leave your device.

Drop images here, click to choose, or paste with Ctrl+V
AVIF files · many files at once · nothing is uploaded

How to convert AVIF to WEBP

  1. Add your AVIF files by dropping them, clicking the drop zone or pasting.
  2. The output format is already set to WEBP. Adjust quality or size if you need to.
  3. Press Convert and compare the original and new size for each file.
  4. Download each file or all of them as a ZIP.

When to convert, and when not to

  • A website builder, plugin or app accepts WebP but not AVIF.
  • You need transparency and a web-friendly format in one file.
  • You serve several formats and want a WebP version for browsers that cannot show AVIF.
  • Do not convert if your destination already takes AVIF and you only want the smallest file. Both are lossy, and a conversion between them costs quality for no gain.

What changes

  • Both formats are lossy, so a second compression pass slightly reduces quality. Raise the slider if you need to stay closer to the source.
  • Transparent areas are kept in the WebP.
  • The WebP can be larger or smaller than the AVIF. Compare the sizes shown for your own pictures.
  • Your browser must be able to read AVIF, and it must be able to write WebP; if not, the WebP button is disabled.
  • Animated AVIF files become one still image. Metadata is not copied.

Why people go from AVIF to WebP

AVIF and WebP aim at the same job, which is to deliver good-looking pictures in small files. They arrived at different times, so some software, content systems and older browsers understand one but not the other. WebP is the one that has been supported in more places for longer.

That makes AVIF to WebP a compatibility step. You are not chasing a smaller file; you are making sure the picture displays in the system that will receive it.

Check where the file will end up before converting. If the receiving system lists AVIF as supported, you can skip this step and avoid a second lossy pass.

Two lossy formats in a row

Every lossy conversion decodes the picture and compresses it again with a different method. The two methods remove detail in different places, so the second pass can add small artefacts on top of the first. Edges, text inside images and smooth sky gradients are the places to inspect.

To limit the loss, convert from your best original when you still have it, and treat the AVIF as the source only when you do not. A higher quality setting gives a closer match to the AVIF at the cost of file size.

If the two outputs look the same to you, take the smaller one. If you can see a difference around text or sharp edges, move the quality slider up a step and try again.

Resizing while you convert

Web images are often larger than the space they fill. The resize controls let you scale by a percentage or set a maximum width and height, and the proportions stay the same. Making the pixels smaller is usually the biggest single way to shrink a web picture.

Try converting one picture at its original size and again at a smaller one, then compare the numbers shown in the list. Your results tell you more than any general rule.

Keep the original AVIF after converting. If you later need a different size or format, starting again from it is better than converting the WebP onward.

Privacy: your files stay on your device

  • The tool decodes, resizes and encodes your pictures with your browser. The files are never sent to a server.
  • To check it yourself: open the browser developer tools (F12), open the Network tab, convert a file, and look for any request that carries your image. You will see none.

Frequently asked questions

Is WebP better than AVIF?

Neither wins on everything. AVIF often aims for smaller files, while WebP is read by more software. Choose based on where the file will be used.

Will my transparent logo stay transparent?

Yes, WebP supports transparency and the converter keeps it.

Why is the WebP button disabled?

Your browser cannot write WebP. Current Chrome, Edge and Firefox can.

Can I resize at the same time?

Yes. Use the percent or max size option in the panel on the right.

Are the files uploaded?

No. Everything happens inside this browser tab.

Should I delete the AVIF afterwards?

Keep it. Starting from the AVIF later gives better results than converting the WebP again.

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