Convert JPG to AVIF
Re-encode JPEGs as AVIF for the smallest files a browser can make.
Drop an image to start
Runs in your browser. Nothing is uploaded.
AVIF holds up better than JPEG at low bitrates in particular — the blocking and mosquito noise that gives away a hard-compressed JPEG largely is not there. For a page carrying a lot of photographs the saving is worth the switch.
It is still a re-encode of a lossy original, so keep quality high rather than compressing twice as hard. Encoding takes longer than the other formats; a batch of large photographs is not instant.
Because this is a second lossy pass, the sensible order is to convert once from the largest original you still have rather than from a file that has already been through a compression step or two. If the JPEG is all there is, keep the quality slider high and accept the smaller saving.
Step by step
- 1Drop in your JPEG files.
- 2Keep the quality high — this is a second lossy pass.
- 3Press Convert — encoding takes a moment — then download.
Questions
How much smaller than JPEG?
Often around half at comparable quality, more at aggressive settings. It varies with the image.
Should I keep the JPEGs?
Keep the originals, yes. Nothing here modifies them, and you may want a fallback for software that cannot read AVIF.
Why does a batch take so long?
AVIF encoding is computationally expensive and images are processed one at a time so the tab stays usable.