Convert JPG to AVIF
This tool converts JPG images to AVIF, the format that packs a photo into the fewest bytes of any format here. A photo often ends up several times smaller than the JPG it came from while looking much the same, which is why modern websites serve it. The trade is compatibility: every current browser shows AVIF, but a lot of other software does not open it yet. The conversion runs in your browser, and your image is never uploaded.
Runs in your browser
Drop an image here
JPG, up to 50 MB
How it works
- 1 Choose a JPG file.
- 2 Set the quality if 75 is not what you want.
- 3 GRID16 encodes the image as AVIF in your browser.
- 4 Download the AVIF file.
Questions
- Why is the default quality 75 and not 90?
- Because the numbers do not mean the same thing in both formats. AVIF at 75 looks about like JPG at 90, while AVIF at 90 would hardly be smaller than the JPG, which defeats the point of converting.
- How much smaller does the file get?
- That depends on the picture. A clean camera photo can shrink to a fifth of its JPG size or less, a grainy or already heavily compressed JPG shrinks less. Lowering the quality trades detail for size.
- Does the image lose quality?
- A little, as with any second lossy pass: the JPG is decoded and encoded again. Detail the JPG had already discarded does not come back.
- Why does the conversion take longer than to WebP?
- Encoding AVIF is considerably more work than JPG or WebP. GRID16 lets the encoder spend that time on a smaller file, so a large photo can take a few seconds, and an image close to the 50 megapixel limit a good deal longer.
- Who can open an AVIF file?
- Every current browser, and more and more image programs. Older software, many print services and some devices cannot, so keep the JPG where a file has to reach them.
- Is my image uploaded to a server?
- No. The conversion happens in your browser; the file never leaves your device.