Compress AVIF Images Online
Squeeze more out of the web's most efficient image format.
Compress JPG, PNG, SVG, WebP images
Up to 10 images at a time, max 5 MB each
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Format is locked while images are being compressed
AVIF already produces the smallest files of any widely supported image format, which makes further compression sound pointless. It rarely is. Encoder defaults are conservative, and AVIF files exported by design tools and conversion scripts frequently retain colour profiles and metadata that add weight without adding anything visible.
How AVIF compression works
AVIF is built on the AV1 video codec, applied to a single frame, which is where its efficiency comes from. That same sophistication makes encoding computationally expensive, so most tools default to a low effort setting to keep processing fast — trading away compression that a slightly slower encode would have captured. imgBoost balances effort against processing time so batches stay responsive while still recovering meaningful size, and strips any metadata carried over from the source image.
Best uses for AVIF
- Performance-critical pages where image weight dominates
- Large hero images and full-bleed photography
- Sites already measuring Core Web Vitals
- Wide colour gamut and HDR imagery
Things to know about AVIF
AVIF support is good but not universal. Chrome, Firefox and Safari all support it in current versions, though users on older browsers will need a fallback — a <picture> element with a WebP or JPEG source handles this cleanly. Encoding is also markedly slower than JPEG or WebP, which matters when processing large batches. AVIF pays off most on large images where the size difference is worth the extra encode time.
AVIF compression FAQs
Is AVIF really smaller than WebP and JPEG?
Yes, typically by a wide margin. AVIF commonly produces files around half the size of an equivalent JPEG, and meaningfully smaller than WebP, at comparable visual quality. The advantage is largest on photographic content and large images.
Why is AVIF slower to process?
AVIF uses the AV1 codec, which explores far more encoding possibilities than JPEG or WebP to find the most efficient representation. That search is what produces the smaller file, and it costs processing time.
Which browsers support AVIF?
Current versions of Chrome, Firefox, Edge and Safari all support AVIF. For older browsers, serve it inside a <picture> element with a WebP or JPEG fallback so unsupported clients get a working image.
Does AVIF support transparency?
Yes. AVIF supports an alpha channel, so it can replace transparent PNGs at a fraction of the size, as well as wide colour gamut and HDR imagery.