AVIF Compressor
Open an AVIF file in your browser and save it smaller as WebP or JPG. Batch friendly, with a quality step and a size cap. Your files are never uploaded.
JPG, PNG, WebP · up to 50 files
Quality
Longest side
Format
Tips
- Browsers can read AVIF but cannot write it, so the saved file comes out as WebP or JPG.
- WebP is the default output; it keeps transparency and stays smaller than JPG at the same quality step.
- Switch the format row to JPG when the app or panel receiving the file will not take WebP.
How to use it
- 1 Drag your AVIF files into the drop area, or pick them from your device.
- 2 Set the output format to WebP or JPG, choose a quality step, and cap the longest side if you also need smaller dimensions.
- 3 Check the new sizes in the list, then download the files one by one or all at once.
What you should know
An AVIF file is small, but not every program will open one. An older desktop app, a marketplace panel or an email client can reject the file and leave you with an image you cannot use. This tool reads your AVIF in the browser and hands it back as a smaller WebP or JPG. You pick the quality step, and you can cap the longest side so large photos shrink in pixels as well as bytes. Drop several files at once; every row shows the size before and after.
The output is a different format for a simple reason: browsers can decode AVIF, but they cannot encode it. So the tool only offers formats it can really write. WebP is the default because it keeps transparency and stays smaller than JPG at the same quality step. Choose JPG when the system receiving the file accepts nothing else. If re-encoding would make a file bigger, the original is kept instead. Everything runs on your own device, so your files are never uploaded and there is no signup or fee.
Frequently asked questions
Why can I not get an AVIF file back?
Browsers can open AVIF but cannot save it. The tool only offers formats it can actually write, so your image comes back as WebP or JPG.
Should I pick WebP or JPG?
Stay on WebP for anything that goes on a website; it keeps transparency and stays smaller than JPG at the same quality step. Pick JPG when the app, panel or client you are feeding will not take WebP.
Are my files uploaded to a server?
No. Decoding and re-encoding happen inside your browser, and the images never leave your device.
Guides
Articles and format references related to this tool.
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