Image
Convert WebP to AVIF
Free, private, and instant — your files never leave your device.
WebP and AVIF are both modern web image formats, but AVIF takes compression further — it typically produces files 20–30% smaller than WebP at equivalent visual quality, using algorithms derived from the AV1 video codec. If you have WebP images optimized for older browser compatibility and want to upgrade for next-generation delivery, converting to AVIF is the natural next step. Both formats support full alpha transparency. The trade-off: AVIF encoding is CPU-intensive and runs via WebAssembly in your browser, so conversion takes longer than WebP or JPEG.
WebP
Web Picture format
- Lossy compression
- Supports transparency
- Best for: web images, CMS uploads, app assets
AVIF
AV1 Image File Format
- Lossy compression
- Supports transparency
- Best for: high-efficiency web images, HDR photography, modern web delivery
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How to Use
- 1
Drop your WebP — the output is already set to AVIF.
- 2
Adjust the quality slider. 75–85% is a good web default; AVIF encodes the same perceptual quality at a lower bitrate than WebP.
- 3
Click "Convert to AVIF" — encoding runs locally via WebAssembly and takes a few seconds.
- 4
Download the AVIF and serve it with a WebP or JPEG fallback for older browsers using <picture>.
Frequently Asked Questions
How much smaller will the AVIF be than the WebP?
Typically 20–35% smaller at equivalent visual quality. The improvement is less dramatic than AVIF vs JPEG — WebP is already an efficient modern format — but still meaningful at scale for large image libraries or high-traffic pages.
Why convert WebP to AVIF instead of keeping WebP?
For maximum compression efficiency on images served to modern browsers (2020+). If bandwidth and storage are priorities and your users are on up-to-date devices, AVIF delivers meaningfully smaller files. For simpler deployments, WebP remains an excellent choice.
Does converting WebP to AVIF reduce quality?
Both are lossy formats, so re-encoding applies compression twice. At quality settings of 75%+, the difference is generally imperceptible. If quality is critical, re-encode from the original lossless source (PNG or TIFF) rather than from the WebP.
Is AVIF browser support complete?
Chrome 85+ (2020), Firefox 93+ (2021), and Safari 16+ (2022) all support AVIF. As of 2025, this covers the vast majority of browsers in active use. Use the HTML <picture> element with a WebP fallback for older Safari versions.