AVIF to WebP

Free AVIF to WebP converter - convert in your browser, no upload, no sign-up.

100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.

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Drop AVIF files here or click to upload

Supports multiple files

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About this tool

Turn AVIF files into WebP. AVIF is the newest web format, and the smallest of the lot at the same visual quality; the catch is that almost nothing outside a current browser can open an AVIF yet. Files usually come out somewhat larger - that is the cost of the compatibility you are gaining. WebP is Google's web format, which keeps transparency while compressing far better than PNG, and both formats are lossy, so the image is re-encoded once. Converting back and forth repeatedly will visibly degrade it - always convert from your original when you still have it. Transparency survives the conversion intact, so cut-out logos and icons stay cut out. No upload and no account. The conversion runs on your machine, which means confidential files stay confidential and a slow connection makes no difference.

How to use this tool

  1. Add your AVIF filesClick the box or drag AVIF images onto it. Nothing is uploaded - your browser reads the files directly.
  2. Let it convertEach image is decoded and re-encoded as WebP on your device. A large batch takes a moment; nothing is queued on a server.
  3. Download your WebP imagesSave them one at a time, or take the whole batch as a single ZIP.

Key features

  • Works offline once the page has loaded.
  • Shows the before and after size of every file, so you can see what the conversion cost or saved.
  • No sign-up, no watermark and no file-count limit.
  • Batch conversion - drop a whole folder and convert it in one pass.
  • Converts AVIF to WebP without uploading anything.

Common uses

  • Converting a batch of AVIF files handed over by a client or a colleague.
  • Getting AVIF images into a document, presentation or email that refuses to embed them.
  • Preparing AVIF images for a platform that rejects the format on upload.
  • Shrinking site images before publishing, without paying for an image CDN.
  • Opening a AVIF in software that only accepts WebP.

Tips for better results

  • Batch the whole folder in one pass - converting one file at a time is the slow way to do this.
  • Convert from the highest-quality AVIF you have, not one that has already been resized or re-saved.
  • Confirm your platform accepts WebP before publishing - most modern websites do, most print shops and older desktop apps do not.

Mistakes to avoid

  • Converting to WebP to "save space". Here it does the opposite - AVIF is the more efficient format of the two.
  • Expecting WebP to repair a low-quality AVIF. Conversion changes the container, never the pixels already inside it.
  • Renaming the file extension by hand instead of converting. That changes the name, not the data, and the file simply fails to open.
  • Converting the same image back and forth several times. Each round trip loses a little more detail, permanently.

Supported formats

  • AVIF
  • WebP

Frequently asked questions

Drop your AVIF files onto the box above and download the WebP results. It all happens on your device - no upload, no account, no queue.

Both formats are lossy, so the image is re-encoded once. Converting back and forth repeatedly will visibly degrade it - always convert from your original when you still have it.

Yes. The converter runs in the browser, so it works on iPhone and Android as well as desktop, without installing an app.

No. The conversion uses your own device's image engine, so your AVIF files never leave your computer. That also means it works with confidential material and on a slow connection.

Yes. Add as many as you like and they are processed together, then download them one by one or as a single ZIP.

Transparency survives the conversion intact, so cut-out logos and icons stay cut out.

Yes, completely - no sign-up, no watermark and no limit on how many files you convert. The work runs in your browser, so it costs nothing to provide.

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