Want the smallest possible photos for a modern website? Convert your JPG images to AVIF. At the same visual quality, AVIF files are typically 30–50% smaller than JPEG, which means faster pages and lower bandwidth bills. avif.tools re-encodes your JPGs to optimised AVIF in one step. If you need to go back to a universal format, AVIF to JPG does the reverse.
How much smaller is AVIF than JPEG?
AVIF uses the AV1 codec's advanced compression, so it routinely beats JPEG by a wide margin — often 30–50% smaller at matching quality, and even more on simple or flat images. For a photo-heavy page, switching from JPEG to AVIF can be one of the single biggest speed wins available. The catch is compatibility: serve AVIF with a JPEG or WebP fallback for older browsers, which a modern <picture> element handles automatically.
When to use AVIF over WebP
Both AVIF and WebP beat JPEG, but AVIF generally compresses better still and handles gradients and high-detail images more gracefully, with fewer banding artefacts. WebP has slightly broader support and encodes faster. For brand-new projects targeting current browsers, AVIF is the strongest choice; where you need a safety margin, keep a WebP version too. Converting PNG to AVIF brings the same savings to graphics.