WebP to AVIF Converter Free
Convert WebP images to AVIF online for free. Upgrade from Google's WebP format to the newer, more efficient AVIF standard. Achieve 20–35% smaller files than WebP at the same quality. Supports transparency. Batch up to 20 files. No signup.
Drop your WebP files here
or click to browse — WebP · up to 20 files free
WebP · Up to 20 files · Max 200 MB total free
0 WebP file(s) selected
Conversion Options
No account required · Files deleted in 24h
Converting WebP to AVIF…
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Conversion Complete!
Your AVIF files are ready.
Download output.avif—
Files
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Input size
AVIF
Output format
Pro — 200 files/batch, 2 GB, lossless AVIF, 10-bit depth, animation support
API access · Priority queue · Team workspace
How It Works
Upgrade WebP images to next-gen AVIF in three steps
Upload WebP Files
Drop your .webp files onto the upload zone or click to browse. Both lossy WebP (the most common type, used by Google Images, Chrome screenshots, etc.) and lossless WebP are supported. Animated WebP files are also accepted — the first frame is converted to a static AVIF. Free plan: up to 20 files, 200 MB total.
Configure AVIF Settings
Select AVIF quality and encoding speed. Enable alpha preservation for WebP files with transparency. Quality 60 is the recommended default — it produces visually excellent AVIF output that is typically 20–35% smaller than the source WebP. The "Balanced" speed preset takes a few seconds per file but produces meaningfully smaller output than "Fast".
Download AVIF Files
Your upgraded AVIF files are ready. Deploy them to your web server, CDN, or CMS. For maximum browser compatibility, use AVIF as the primary source in a <picture> element with your original WebP as a fallback — this way all visitors get the best format their browser supports, with no quality loss for anyone.
WebP to AVIF Features
Upgrade your web images to the most efficient format available
Smaller Than WebP
AVIF consistently beats WebP in compression efficiency. Studies from Netflix and Google show AVIF achieves 17–30% better compression than WebP at equivalent quality (SSIM). For a typical product image, a 150 KB WebP might become a 110–125 KB AVIF — not as dramatic as WebP vs JPEG, but meaningful at scale. Across thousands of page views and images, the cumulative bandwidth savings and faster load times are significant.
Transparency Preserved
WebP supports both lossy and lossless alpha transparency. Our converter detects and preserves the WebP alpha channel in the AVIF output, using AVIF's dedicated alpha plane (a separately AV1-encoded greyscale image). The resulting AVIF will display with correct transparency in all AVIF-supporting browsers. This is crucial for logos, product images on transparent backgrounds, and UI overlay assets.
Full WebP Decode Support
Our converter handles all WebP sub-types: lossy WebP (VP8 codec), lossless WebP (VP8L), and extended WebP with transparency (VP8X). Animated WebP (WebP animations) are decoded and the first frame is exported as a static AVIF. Both 8-bit and any wider colour spaces in WebP are correctly handled. Files from Chrome, Google Images, Android, and any other WebP source are supported.
Batch — 20 Files at Once
Convert up to 20 WebP files to AVIF in a single batch. All files receive the same quality and speed settings. Results download as a ZIP archive with filenames preserved (extension changed to .avif). Ideal for web developers migrating a site's image library from WebP to AVIF as part of a performance optimisation project or tech stack upgrade.
Ideal Deployment Strategy
The best practice for production deployment is to serve both AVIF and WebP using <picture> with content negotiation. Browsers that support AVIF (Chrome, Firefox, Edge, Safari 16.4+) get the AVIF; older browsers fall back to WebP. This gives you maximum performance for modern users without breaking compatibility. Our converter gives you the AVIF files needed for this dual-format strategy.
Private & No Account Needed
All uploads are encrypted with TLS 1.3. WebP files and AVIF outputs are processed in isolated server containers and permanently deleted within 24 hours. No watermarks are added to converted images. No account, signup, or payment is required to use the free tier — convert up to 20 WebP files to AVIF immediately.
Free vs Pro
| Feature | Free | Pro |
|---|---|---|
| Files per batch | 20 | 200 |
| Max total upload size | 200 MB | 2 GB |
| AVIF quality range | 4 presets | CQ 0–63 slider |
| Animated WebP → AVIF sequence | First frame only | |
| Lossless AVIF output | — | |
| API access | — | |
| Priority conversion queue | — | |
| Watermark | None | None |
Frequently Asked Questions
Yes, in terms of compression efficiency — AVIF consistently achieves 17–30% better compression than WebP at the same SSIM quality score. AVIF also supports HDR, 10-bit colour depth, and wider colour gamuts like Display P3 and Rec. 2020, which WebP doesn't support. The main disadvantage of AVIF over WebP is encoding speed (AVIF takes much longer to encode) and slightly less browser support (Safari added AVIF in version 16.4, while WebP has been in Safari since 14.0). For production use, serve both: AVIF for modern browsers, WebP as fallback.
Yes, typically by 15–30%. Since WebP is already a compressed format, there's less room for improvement than converting from JPEG, but AVIF's superior AV1 codec still finds efficiency gains. The key caveat: you are transcoding (WebP decode → pixel buffer → AVIF encode), which means the AVIF will inherit any lossy artefacts from the original WebP encoding. For the best AVIF quality, encode directly from a lossless source (PNG, TIFF) using our PNG to AVIF converter, rather than transcoding from an already-compressed WebP.
The free tier extracts the first frame of an animated WebP and converts it to a static AVIF image. Full animated WebP to animated AVIF (AVIF Image Sequence / AVIS) conversion is available in the Pro tier — it processes each frame through the AV1 encoder and packages them into an AVIF sequence file. Note that animated AVIF is not yet widely supported in browsers (Chrome 93+ supports it, Firefox support is partial), so animated WebP may still be the more practical choice for animations in 2024.
Use the HTML <picture> element: <picture><source srcset="image.avif" type="image/avif"><source srcset="image.webp" type="image/webp"><img src="image.jpg" alt="description"></picture>. Browsers pick the first supported format — modern browsers get AVIF, older browsers fall back to WebP, and very old browsers get JPEG. If you use a CDN (Cloudflare, Fastly, Imgix, Cloudinary), check if they support automatic AVIF serving via Accept header negotiation — many do, eliminating the need for manual <picture> tags.
By default, no — the AVIF output uses lossy AV1 compression regardless of whether the source WebP was lossless. This means a small amount of quality reduction is introduced during the encode. At quality 80, this is essentially invisible. If you need true lossless AVIF output (preserving every pixel from the lossless WebP), that option is available in the Pro tier. Lossless AVIF is significantly larger than lossy AVIF and is primarily useful for source files and archival, not web delivery.
Yes. All uploads use TLS 1.3 encryption. Files are processed in isolated server containers and permanently deleted within 24 hours. No watermarks are added. We never view, share, or retain your image files. No account is required.