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Compress AVIF Images Online
Smaller AVIF files, and an honest account of what the compression costs
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Compress an AVIF that is already compressed
AVIF is the most efficient image format in common use, which puts anyone landing on this page in an unusual position. Your file is already the small version. Whatever exported it has already thrown away what it thought you would not miss, and you are here because it still is not small enough. That changes what this tool can honestly offer you, and it is worth saying plainly before you upload anything.
This one is lossy, and pretending otherwise would be a lie
Some compression takes nothing away. Zipping a file, cleaning junk out of an SVG, repacking a TIFF: the data survives intact. AVIF does not work that way. To make an AVIF smaller you have to decode it and encode it again at a lower quality, and every pass through that cycle costs detail you cannot get back. Any tool telling you it compresses AVIF with no quality loss is either not compressing it or not telling you the truth.
What you get here instead is the honest version. On a test file, a 13.6 KB image came back at 8.7 KB, which is 36 percent smaller and measurably degraded: fine gradients flatten slightly and sharp edges soften. On a photograph the difference is hard to see at normal size. On a screenshot with text or a flat graphic with hard edges it can be obvious.
When this is worth doing
Compressing an already compressed file makes sense less often than people expect, so it helps to know which situation you are in.
| Your situation | Worth it? |
|---|---|
| Exported at high quality and it is too heavy for the web | Yes, this is the case it was built for |
| A photograph that needs to fit an upload limit | Yes, photos hide the loss well |
| A screenshot, a chart, or a logo with hard edges | Probably not, artefacts show badly here |
| Already squeezed once and still too big | No, go back to the original and re-export |
| An archive or master copy | No, keep the original untouched |
Go back to the source when you can
One re-encode is a compromise. Two is a mess. If you still have whatever the AVIF came from, a RAW file, a PSD, a high quality JPEG, exporting a fresh AVIF from that will always beat squeezing the AVIF you already have. Each generation of re-encoding builds on the artefacts of the last one, and the result gets muddy faster than the file gets small. Use this tool when the original is gone or out of reach, which is most of the time, and go back to the source when it is not.
Why your AVIF might be big in the first place
An oversized AVIF is usually an export problem rather than a format problem. Design tools often default to a quality setting far higher than anything a screen needs, and some export at the full pixel dimensions of the artboard regardless of where the image will actually appear. A 4000 pixel wide image displayed in a 800 pixel column is carrying five times the data it needs, and no amount of compression fixes that as cleanly as resizing would. If your file is unusually large for what it shows, check its dimensions before you compress it.
Nothing to configure
There are no quality sliders here. One setting is applied to every file, chosen to take a useful amount off without pushing into obvious damage. If you need precise control over the quality target, that is a job for a desktop encoder where you can compare settings side by side. This is for when you want a smaller file quickly and can live with the standard trade.
Animated AVIF
AVIF can hold an animation, in the same way a GIF does. That is a different kind of file and it is not what this tool is built for, so if you upload an animated AVIF, check what comes back before you use it anywhere. For a still photograph or graphic, which is what almost every AVIF is, there is nothing to worry about.
What happens to your files
Files travel over an encrypted connection, get compressed, and are deleted from the server an hour later. Your original on your own machine is never touched, so if the result is not good enough you still have what you started with. That last part matters more here than on most tools, because this is the one operation on this site you cannot undo.
What you get
- A smaller AVIF that is still an AVIF, roughly a third off on a typical file
- An honest lossy trade rather than a claim of no quality loss
- Nothing to configure: one setting applied to everything
- Batch upload, with one by one downloads or the whole set as a ZIP
- Your original left untouched, so a bad result costs you nothing
- No account, no install, and files deleted from the server an hour later
What’s next?
If the file started life somewhere else, compressing the source is usually the better move: Compress JPG for photographs and Compress PNG for graphics with flat colour. And if you need something with wider browser support than AVIF still has, Compress WebP is the safer format to publish.
Frequently Asked Questions
Yes. There is no honest way around it, so it is worth understanding rather than glossing over. Making an AVIF smaller means decoding the image and encoding it again at a lower quality, and every pass through that cycle discards detail permanently. On a test file we measured a 36 percent size reduction with visible softening in fine gradients and along sharp edges. On a photograph at normal viewing size you are unlikely to notice. On a screenshot or a logo with hard edges you probably will. Any AVIF compressor advertising no quality loss is either not compressing anything or not being straight with you.
Often not, and that is the useful answer rather than the one that gets you to upload. AVIF is already the most efficient format in wide use, so a well exported file has little slack left in it. Squeezing it again buys a modest saving at a real cost in quality. The exception is a file exported at a much higher quality setting than it needs, which happens more than you would think because design tools default high. If you are unsure, run one file through, compare it against the original at full size, and decide from there.
Go back to the original whenever you still have it. Exporting a fresh AVIF from a RAW file, a PSD or a high quality JPEG will always beat re-compressing an AVIF, because each round of encoding builds on the artefacts left by the last one and the picture degrades faster than the file shrinks. This tool exists for when the original is gone, which is most of the time in practice, and it does that job properly. It just should not be your first choice when you have a better option sitting in a folder.
Usually because of how it was exported rather than anything about the format. Design tools often default to a quality level well above what a screen needs, and many export at the artboard’s full pixel dimensions no matter where the image will actually be displayed. An image 4000 pixels wide shown in an 800 pixel column carries roughly five times the data it needs, and compression is a poor substitute for simply resizing it. Check the pixel dimensions of your file before you compress: if they are far larger than the space the image occupies, resizing will help more and cost less quality.
AVIF can hold an animation the way a GIF does, and that is a different kind of file from the still images this tool is built around. If you upload one, check the result before you use it anywhere rather than assuming the animation survived. Almost every AVIF in the wild is a single still image, so for most people this does not come up.
Files are sent over an encrypted connection, compressed, and deleted from the server an hour later. Nothing is stored beyond that and nothing is used for any other purpose. As for undoing it: you cannot, and that is worth taking seriously here more than on other tools, because the quality this removes is gone for good. What protects you is that your original file on your own machine is never touched. What you download is a separate copy, so if you compare the two and prefer the original, simply keep the original.