How to use it
- Drop your images here, mixed formats are fine.
- Set the quality.
- Convert, then download the AVIF files in one ZIP.
Why AVIF?
AVIF is the still-image version of the AV1 video codec. For the same look it is usually smaller than WebP and much smaller than JPG, handles smooth gradients better, and supports transparency. On websites, smaller images mean faster loads and better Core Web Vitals.
The quality scale is matched to JPG: where you'd use 80% for a JPG, 80% here gives a similar look in a smaller file. Not sure which format wins? The "smallest" mode in Compress image tries all three and keeps the smallest.
Good to know
- AVIF encoding is slower than JPG: 5–20 seconds per large photo.
- AVIF output does not carry over EXIF metadata.
- The encoder downloads on first use (about 1 MB) and is cached afterwards.
Your images are never uploaded; everything runs in your browser.
Frequently asked questions
Which browsers show AVIF?
All current ones: Chrome, Edge, Firefox and Safari 16+. Give very old browsers a JPG fallback.
Can it make lossless AVIF?
The encoder can, but the interface uses lossy mode, which is where photos save the most.
Can I convert back?
Yes, with AVIF to JPG.
Last updated: November 13, 2026