FREE IMAGE TOOL
Convert Images to AVIF Online — Free
Encode images as AVIF with a local WebAssembly codec and adjustable quality.
- 100% in browser
- No upload
- No signup
- No watermark
LOCAL BY DESIGN
Convert to AVIF, without the upload step
AVIF is a highly efficient image format that can deliver compact files at useful visual quality. It is a good option for modern websites and image libraries where browser support is part of the requirements. This tool uses a WebAssembly encoder rather than trusting browser canvas AVIF support, which can vary by browser.
Choose one or more browser-readable images, select an output quality, and start processing. The codec runs on your device. The first AVIF encode may take longer while the browser loads the codec; subsequent work in the same session can reuse loaded assets.
AVIF is not always the right delivery format for every audience or workflow. Check that the services and older devices you use can read it. If you need broad compatibility, choose JPEG, PNG, or WebP from the format menu. Review the rendered result and actual file size before replacing original files.
Files are decoded and processed on your device. They are not uploaded to an ImageKit server, and the original files are never overwritten.
How it works
- 01
Choose the images to encode.
- 02
Select AVIF and tune the quality setting.
- 03
Wait for local encoding, then inspect and download the results.
Frequently asked questions
How is AVIF encoded?
AVIF output is generated with the Squoosh Kit WebAssembly codec; it does not rely on canvas.toBlob claiming AVIF support.
Does AVIF support transparency?
Yes. AVIF can include transparency, which is retained when the source decoder and encoder support the alpha channel.
Are my photos uploaded?
Your image stays in this browser tab. Processing runs locally on your device; the image file is not sent to an ImageKit server.