Convert PNG to AVIF

AVIF offers the best compression efficiency of any mainstream image format today, and the gains are especially dramatic when converting from PNG. A lossless PNG screenshot, graphic, or photo can be dramatically reduced — often by 60–70% — when converted to AVIF, even at high quality settings.

The technical reason comes down to the codec. AVIF is based on the AV1 video codec, which uses decades of video compression research to model images more accurately than any previous still-image format. Where PNG stores pixels losslessly and WebP extends that with a more efficient entropy coder, AVIF can represent the same visual information with far fewer bits.

For developers optimising web performance, converting PNGs to AVIF is one of the highest-ROI changes available. Transparency is supported: unlike JPEG, AVIF preserves alpha channels just like PNG does. For content like product screenshots, UI illustrations, transparent icons, and infographics, AVIF delivers web-ready sizes without sacrificing the sharp edges and accurate colours that your design requires.

The conversion is particularly effective for images that contain both photographic regions and graphic elements — think a product photo with a transparent background on top of a textured canvas. Previous formats required separate layers or format tricks to handle this well; AVIF handles it natively and compresses both regions efficiently.

A word on encoding time: AVIF encodes more slowly than PNG or WebP because of its more complex algorithm. OptiPic's browser-based encoder uses your device's capabilities directly, so a large PNG might take 2–5 seconds to encode as AVIF. The resulting file, however, will be fast to download for every visitor who loads it, making that one-time encoding cost a very good investment.