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WebP to AVIF converter

This WebP to AVIF converter turns WebP images into AVIF files, which are often noticeably smaller at similar visible quality.

Lower means a smaller file.

Width × height (px)

How to convert WebP to AVIF

  1. Choose or drop one or more WebP files above.
  2. Adjust quality if needed. 90% keeps excellent detail.
  3. Download each AVIF, or save them all as a ZIP.

Why convert WebP to AVIF?

AVIF usually compresses better than WebP, so the same picture can take fewer bytes. For image-heavy pages that can mean faster loading. Both formats support transparency, so cut-out graphics keep their clean edges.

How this page makes AVIF

Browsers can show AVIF but cannot create it, so this page includes its own AVIF encoder. It downloads once from this site, about 3.5MB, your browser keeps it, and conversion runs on your device. The first file takes a little longer, and big images take longer than small ones.

Before you switch

  • Converting WebP to AVIF is a second round of lossy compression, so keep your originals.
  • Not every app opens AVIF yet. WebP is supported in more older software.
  • Compare the new file size with the original before you replace it.

Related tools

Going the other way, use the AVIF to WebP converter. For JPG sources, try JPG to AVIF. The PNG to AVIF converter works for lossless sources.

Privacy, speed and file names

Every WebP file is opened and saved as AVIF inside your browser, so nothing is uploaded and conversion starts right away. Speed depends on your device, not your connection. Results are named after the original with “-tech9pros” added, so your originals are never overwritten. The AVIF encoder downloads once, about 3.5MB, and then stays cached.

Converting many files

Select up to 30 files at once and download them one by one or as a single ZIP. If you change a setting, the files are converted again with the new value, so you can try a different quality without adding them again.

If something goes wrong

If the conversion fails, reload the page or try a different browser. AVIF encoding needs a modern browser with WebAssembly.

Frequently asked questions

Is AVIF smaller than WebP?

Often by 20 percent or more at similar visible quality, but it depends on the picture.

Why is the first conversion slower?

Your browser downloads the AVIF encoder, about 3.5MB, the first time. After that it is cached.

Does it keep transparency?

Yes. AVIF supports transparent backgrounds, so they are kept.