WebP to AVIF converter

Convert WebP images to AVIF right in your browser — no upload, no sign-up, completely free. Drop a file (or a whole batch) and download the AVIF version in seconds. Your images are processed on your own device and never sent to a server.

WebP is a modern Google format that supports transparency and usually produces files 25–35% smaller than PNG or JPG at a similar quality, which is why it is popular on the web. AVIF is a next-generation image format based on the AV1 video codec. It offers the best compression of the common web formats — often much smaller than JPG or WebP at the same quality — with transparency and wide colour support. AVIF usually makes noticeably smaller files than WebP, which speeds up websites and saves storage. Transparency is preserved — transparent areas stay transparent in the AVIF file.

How to convert WebP to AVIF

1. Add your WebP files. Drag your WebP images onto the drop zone, paste, or click to browse. You can add several at once.
2. Convert. Each image is converted to AVIF on your device. Use the quality slider to balance size and clarity.
3. Download your AVIF files. Save each file, or grab them all together as a ZIP.

Features

• Private by default. Images are converted in your browser and never uploaded.
• Batch conversion. Convert many WebP files at once and download them all as a ZIP.
• Keeps transparency. Transparent areas are preserved in the AVIF output.
• Free and unlimited. No watermark, no sign-up, no per-file limits.

When to use it

• Shrink WebP photos to AVIF for faster-loading web pages.
• Convert WebP files to AVIF for an app or platform that prefers AVIF.
• Batch-convert a folder of WebP images to AVIF in one go.
• Prepare AVIF images for the smallest possible web images at high quality.