Convert WebP to AVIF Online
AVIF is roughly 20% more efficient than WebP at the same visual quality. If you've already optimized your site with WebP and want one more level of file-size savings, converting to AVIF is the next step.
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Why convert WebP to AVIF?
WebP and AVIF are both modern web formats, but they belong to different generations of compression technology. WebP, derived from VP8, was state-of-the-art in 2010. AVIF, derived from AV1 (the codec behind YouTube's newest video streams), is state-of-the-art today. The result: AVIF typically beats WebP's file size by 15–25% at equivalent perceptual quality.
For sites that already serve WebP, the upgrade to AVIF is incremental but worthwhile — especially for hero images and large product photos where every kilobyte matters for LCP scores. AVIF inherits WebP's advantages (alpha transparency, wide color gamut support) without any of its limitations.
Browser support is now broad enough to make AVIF the primary format with WebP as a fallback inside a <picture> element.
Common use cases
- Upgrading an existing WebP-optimized site
- Aggressively optimizing for Core Web Vitals
- Building modern <picture> sources with multi-format fallback
- Cutting CDN costs further on already-optimized sites
How to convert WebP to AVIF
- Upload your WebP files — drag and drop into the uploader above, or click to browse. Up to 20 files per batch, 25 MB each.
- Confirm AVIF as the output format — the format selector is already pre-selected for this conversion. You can change it before clicking Convert if you change your mind.
- Click Convert — your WebP files are processed on our server in seconds. A progress bar shows live status for each file.
- Download the ZIP — your converted AVIF files are bundled into a ZIP for one-click download. Source files are deleted immediately afterwards.
WebP to AVIF — Frequently Asked Questions
Is the WebP to AVIF converter really free?
Yes — completely free, with no signup, no credit card, no watermarks, and no file count limits. The full feature set is available without any account.
Are my WebP files private?
Yes. Files are stored in a private directory outside the web root, never shared with anyone, and deleted immediately after you download your ZIP.
How many WebP files can I convert at once?
Up to 20 WebP files per batch, with a maximum of 25 MB per file. There are no limits on the number of batches you can run.
Does the converted AVIF keep the same image quality?
Quality is essentially indistinguishable from the WebP source at typical viewing sizes. AVIF uses lossy compression, but the quality settings are tuned for high fidelity, so the conversion produces visually identical results for almost all images.
Which browsers support AVIF?
Chrome, Firefox, Edge, Opera, and Safari (16.4 and later) all support AVIF. For the small remaining gap in coverage, serve AVIF inside a <picture> element with a WebP or JPG fallback.
Related image conversions
Or browse the full supported conversions matrix on the homepage.