Compress AVIF
An AVIF-only compressor that re-encodes AVIF files with a modern AV1-based encoder for tight, high-quality outputs.
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Accepted: .avif,image/avif · Max 24 MB
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About this tool
AVIF, built on the AV1 codec, achieves some of the smallest photo sizes in the industry, but the encoders that ship inside design tools and cameras are often conservative and leave a lot on the table. This tool takes an existing AVIF file and re-encodes it in your browser with adjustable quality or a specific size target, so you can trim performance-critical images even further. Because AVIF supports both photographic detail and transparency well, it is ideal for modern hero images, product shots, and web-first illustrations.
FAQ
AV1-based encoding does more work per pixel to squeeze the file — the trade-off for its excellent size-to-quality ratio.
Support is broad in modern browsers but not universal in email or older systems. Keep a fallback where needed.
Yes, AVIF alpha is retained.
No, this tool stays in AVIF. Use a converter for a different format.
No. AVIF compression is local, provided your browser can decode AVIF.
More about this tool
How it works
- Add an AVIF image (your browser must be able to decode AVIF).
- Choose a mode. If decode fails, convert to JPG or PNG first.
- Download the compressed AVIF when finished.
Features
- AV1-based encoder — Uses a WebAssembly AVIF encoder to preserve subtle detail at very low bitrates.
- Quality, size, or percent modes — Aim at the metric you brief on — visual quality, KB budget, or ratio.
- Alpha channel supported — Transparency in the source AVIF is retained.
- Fully local — Compression runs inside your browser tab.
Supported formats
Input: AVIF. Output: AVIF.
Input
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AVIF avif
Output
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AVIF avif
Common uses
- Optimizing hero and product AVIFs on modern websites
- Cutting bandwidth on performance-sensitive landing pages
- Reducing photo backups that were exported to AVIF
- Refining AVIFs pushed from headless CMS pipelines
- Shrinking AVIF illustrations before use in blog posts
Limitations
- Only AVIF inputs are supported.
- AVIF encoding is CPU-heavy; large batches may take longer than JPG or WebP.
- Older browsers and email clients may not render AVIF; keep a JPG or WebP fallback for those channels.
- Roughly 25 MB per file, and target sizes are approximate.
- Many browsers can decode AVIF but cannot encode it. In that case Konvert outputs a compressed WebP or JPG instead and says so in the result.