AVIF is the format you get, not the format you chose
AVIF is the newest royalty-free web image format, built on the AV1 video codec, and many large sites have served it since roughly 2021 because it beats JPG and WebP on compression. Browsers request it automatically when they support it, which means right-click, save image often hands you an .avif file you never asked for. The same thing happened with WebP a few years earlier. The web moved on; upload forms, older editors and company tools mostly did not, so a quick conversion back to JPG remains the practical fix.
Native decoding makes this conversion instant
Every modern browser ships a built-in AVIF decoder, so this tool loads no extra decoding code at all. Your browser reads the AVIF exactly as it would on any web page, then writes the pixels into a JPG at 90% quality. That adds one mild lossy pass on top of the compression the AVIF already had, which is typically invisible for photos headed to an upload form or a chat.
If you need a pixel-exact copy for editing, use AVIF to PNG instead. And if the image has a transparent background, PNG is the right target anyway, because JPG flattens transparency onto white.
Common questions
Why did I end up with an AVIF file in the first place?+−
You probably saved an image from a website. Many sites have served AVIF since roughly 2021 because it compresses better than JPG and WebP, and your browser silently picks it when it can. Like WebP before it, AVIF is the format you get, not the format you chose, and the mismatch only surfaces when another program refuses to open it.
Does converting AVIF to JPG lose quality?+−
It adds one mild lossy pass. The AVIF was already lossy-compressed, and re-encoding to JPG at 90% quality introduces a small additional loss that is typically invisible at normal viewing sizes. If you plan to edit the image heavily or need a pixel-exact copy, convert to PNG instead, which stores the decoded pixels losslessly.
Why is this converter so fast for AVIF?+−
All modern browsers decode AVIF natively. Chrome, Firefox, Safari and Edge all ship an AV1 image decoder, so this page loads zero extra decoding code and the conversion runs at the browser's native speed. Formats like HEIC need a bundled decoder; AVIF does not, which is why even large batches finish quickly.
Will the JPG open in programs that rejected the AVIF?+−
Yes, that is the point of converting. JPG has been the universal photo format for over three decades, so upload forms, older photo editors, office software and printing services that reject AVIF will accept the JPG without complaint. Nothing about your workflow needs to change beyond the file you pick.