AVIF Converter — Free, Fast & Private
AVIF is the most advanced image compression format available. Based on the AV1 video codec, it produces files roughly 50% smaller than JPEG and 20% smaller than WebP at the same visual quality.
MiniPx converts images to AVIF for maximum compression, and converts AVIF files back to JPG or PNG for compatibility with older software. Both directions are handled entirely in your browser.
AVIF excels at photographs, gradients, and images with subtle color transitions — areas where JPEG shows visible artifacts. The format supports both lossy and lossless compression, HDR, and wide color gamut.
Browser support has expanded rapidly: Chrome 85+, Firefox 93+, Safari 16.4+, and Edge 121+. For web delivery, AVIF is the best choice for file size, with WebP or JPG as fallback for older browsers.
AVIF encoding is more computationally intensive than JPEG or WebP, so conversion takes slightly longer. The file size savings more than compensate for the encoding time, especially for web delivery where smaller files mean faster page loads.
Two conversions into AVIF are worth calling out because the source format changes what you gain. Going from WebP to AVIF buys roughly 20% on top of an already-compressed file, so it is worth doing for photographs and rarely worth doing for flat graphics. Going from SVG to AVIF is a different trade entirely: you give up infinite scalability for a fixed raster, which only makes sense when the destination cannot render SVG at all.