FORMAT DIFFERENCES
Where AVIF and JPG really differ
File size and compression
AVIF compresses with the AV1 video codec, which is far more efficient than JPG’s older compression method. At the same perceived quality, AVIF files are usually 30–50% smaller than JPG — and complex photos with rich gradients can come out more than 50% smaller. JPG shrinks files by permanently discarding data; push the quality down and you’ll see blocky artifacts and halos around edges.
Image quality
At the same file size, AVIF keeps more detail with fewer artifacts, especially in gradients, text edges, and fine textures. JPG still looks fine for everyday photos, but over-compressed JPGs show visible color bands in skies and blurry text. Independent tests suggest AVIF is consistently accurate at a quality setting of 60–70%, while JPG needs roughly 80% or higher to catch up.
Transparency
JPG has no transparency channel. Transparent areas are filled with a solid background color (usually white) when saved as JPG. AVIF supports a full alpha channel, so it can keep transparent backgrounds like PNG. If you need transparent output, convert to PNG instead.
Animation
AVIF can store animations and multi-image sequences; JPG is a single static image. That’s also why an animated or multi-image AVIF can’t become a single JPG — our converter rejects those files rather than silently keeping one frame.
Color and HDR
JPG is limited to 8-bit color with no HDR support. AVIF supports 10/12-bit depth, high dynamic range, and wide color gamuts — valuable for professional photography. For most everyday web and sharing use, 8-bit is enough, so this matters less in practice.
Compatibility
JPG is accepted by essentially every device, app, email client, and submission system. AVIF works in all major browsers but is still uneven elsewhere: older software (like pre-2022 Adobe apps), some email clients, and a few photo viewers on Android or cloud storage can’t open it. Some specialized tools, like photogrammetry apps that build 3D models from photos, still require JPG.
Editing and sharing
Every editor opens JPG natively; AVIF needs recent software (Photoshop 2022+), and re-saving a lossy format repeatedly accumulates quality loss. For sharing, JPG is the safest works everywhere choice — upload forms, email, and older devices almost always accept it. When you need a lossless editing baseline, prefer PNG.
