AVIF Converter

AVIF (AV1 Image File Format) isn't just an image format—it is actually a single frame of an AV1 Video wrapped in an image container.

Streaming companies (like Netflix and Google) spent billions researching how to compress video to save bandwidth, resulting in the open-source AV1 video codec. Engineers realized that if a codec is incredibly good at compressing a continuous stream of moving pictures, it would be even better at compressing just one picture.

AVIF uses advanced video-encoding techniques like intra-frame prediction. It divides the image into distinct blocks and mathematically predicts what colors should exist in one block based on the pixels in the blocks around it.

This spatial mathematical prediction allows AVIF encoders to throw away up to 50% more data than a standard JPEG encoder without causing any noticeable loss in visual quality to the human eye.

Because AVIF relies on complex matrix math and prediction models, encoding an AVIF image is highly CPU intensive. It takes significantly longer to save an AVIF than a JPEG.

This tool uses a WebAssembly port of the AV1 encoder running inside a background Web Worker, allowing your computer's CPU to churn through the math without freezing your browser interface.