AVIF to JPG

How it works

AVIF is a modern codec that usually beats JPEG and even WebP on file size at the same visual quality, but it's newer — some editors, CMSes and print pipelines still expect JPEG instead. This tool converts AVIF images to JPG directly inside your browser tab, using the mozjpeg encoder for a smaller, cleaner result than a browser's built-in JPEG encoder.

When you drop a file, Moyang reads its first bytes to confirm it's really an AVIF image, then hands the bytes to a background Web Worker. Most current browsers can decode AVIF natively; where that's not available, Moyang automatically falls back to a WebAssembly decoder so the conversion still completes. Because JPEG has no transparency channel, any transparent pixels are composited onto the background color you choose above — white by default — before mozjpeg encodes the result. Your original file is never modified, and nothing ever leaves your device.

Because everything runs locally, there's no 10-conversions-a-day limit, no 100MB cap, and no processing queue — the kind of restrictions server-based converters impose to control their hosting bill. Convert one file or fifty; once a batch is done, download every result at once as a single ZIP.

Limitations

Converting from a modern, efficient codec back to JPEG usually increases file size — that's the expected cost of trading compression efficiency for compatibility, not a flaw in the conversion. JPEG is also a lossy, quality-adjustable format, so re-encoding always discards some detail. Images over 100 megapixels aren't converted — decoding runs entirely in your browser's memory, and a file that large risks crashing the tab before it even gets to JPEG encoding.

FAQ

Is this AVIF to JPG converter really free?

Yes — completely free, with no file size limits, no daily quota, and no account required. All conversion happens in your browser, so there's no server cost to recoup.

AVIF is more efficient than JPG — why convert to it at all?

Efficiency isn't the only thing that matters. Some photo editors, older CMSes, print workflows, and social platforms still don't accept AVIF uploads, or handle them inconsistently. Converting to JPG trades some file size back for near-universal compatibility.

Will this work if my browser can't open AVIF files?

Most current versions of Chrome, Firefox, Edge and Safari decode AVIF natively, and Moyang uses that built-in decoder when it's available. If your browser doesn't support it, Moyang falls back to a WebAssembly decoder automatically — the conversion still works, just marginally slower.

What happens to transparency when converting to JPG?

JPEG doesn't support transparency. Any transparent areas in the source AVIF are filled with a solid background color before encoding — white by default, but you can pick any color above before converting.