Image to AVIF Converter Online

If you are serious about passing Google's Core Web Vitals assessment, relying on legacy .jpg or .png files is a massive handicap. AVIF (AV1 Image File Format) is the modern, next-generation image format that offers vastly superior compression. This converter is built to instantly upgrade your legacy photos into ultra-lightweight AVIF payloads.

The AV1 Video Codec Engine

AVIF isn't just a slight improvement over WebP; it is fundamentally built on the AV1 Video Codec. It uses advanced spatial prediction algorithms originally designed for streaming 4K video. This means an AVIF image can often maintain the exact same visual quality as a JPEG, but at 50% to 70% of the file size.

Perfect Alpha Transparency

Historically, if you needed a transparent background, you were forced to use a heavy, uncompressed PNG file. AVIF fully supports 8-bit, 10-bit, and 12-bit alpha channels, allowing you to create stunning transparent graphics that are a fraction of the size of their PNG equivalents.

WebAssembly Engine

Because native browser support for encoding AVIF is still maturing, you usually need server-side software to process the conversion. To protect your privacy, this tool uses a WebAssembly (Wasm) port of the AV1 encoder. It compiles the complex C++ encoding logic directly into your browser, ensuring your images never leave your local machine.