Compress AVIF images — free, private, no upload
Re-encoded with libavif in your browser. You see exact before/after sizes on every file.
About compressing AVIF
AVIF applies the AV1 video codec to still images. At typical web quality it produces files around 50% smaller than JPEG and 20–30% smaller than WebP, with support for transparency, HDR, and 10/12-bit color. Chrome, Firefox and Safari all support it (Safari since 16.4, 2023). Encoding is slower than other formats — that is the price of the compression — but for web delivery it is currently the strongest choice.
How to compress AVIF
- 1Drop AVIF files above — batches are fine, and nothing is uploaded.
- 2Pick a quality (80 is visually lossless for photos). The output format stays the same unless you change it.
- 3Watch each file’s size drop, then download individually or as a ZIP.
AVIF strengths & limitations
Strengths
- Best-in-class compression — often 50% smaller than JPEG
- HDR, wide gamut, 10/12-bit color, transparency
- Royalty-free and supported in all modern browsers
Limitations
- Slow to encode, especially large images
- Limited support in desktop software and older devices
- Maximum image dimensions are lower than JPEG (8K tiles)
Frequently asked questions
How does AVIF compression work here?+
Your AVIF is decoded and re-encoded at the quality you choose using libavif, entirely in your browser.
What quality setting should I use for AVIF?+
Quality 80 is the sweet spot for photos — visually identical to the original for almost everyone. Use 60–70 for thumbnails and previews, 90+ only when you plan to edit the image again later.
Is there a limit on file size or number of images?+
No hard limits: processing runs on your own device, so the only constraint is your browser’s memory for truly gigantic images. Batch as many files as you want.
Will compressing AVIF remove metadata?+
Yes. Output files are built from raw pixels, so EXIF data — GPS location, camera model, timestamps — is stripped. Orientation is baked into the pixels first so photos stay upright. This usually saves a few extra kilobytes too.
Are my images uploaded anywhere?+
No. The codecs run as WebAssembly in your browser; the page works offline once loaded. Files, previews and results all live in your device’s memory only.