WebP to AVIF Converter

How to Convert WebP to AVIF Online

1. Upload Your WebP File: Drag and drop one or more .webp files, or click "+ Add Files" to browse. Batch uploads are supported — every file uses the same settings, so you can re-encode a whole image directory in one pass.
2. Pick Quality Preset: Default is Very High (Recommended), which usually lands AVIF files 20-30% smaller than the source WebP with no visible difference. Drop to High or Medium for aggressive size cuts on hero banners and thumbnails, or switch to Specific file size to target a hard byte budget (KB or MB) and let the encoder solve for it.
3. Resize (Optional): Use Resolution Percentage to scale by a ratio (keep original is the default), pick a Preset Resolution (e.g., 1080P, 720P, 480P), or set an exact Width × Height in pixels. Aspect ratio is preserved when you fix only one dimension.
4. Convert and Download: Click Convert. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared.

Why Convert WebP to AVIF?

WebP, released by Google in 2010, was the first widely-supported "next-gen" web image format and is currently understood by roughly 96% of browsers. AVIF, finalized by the Alliance for Open Media in February 2019 and built on the AV1 video codec, is the successor — it cuts file size another 20-30% versus WebP at matching visual quality and adds proper HDR, 10/12-bit color, and wide-gamut BT.2020 support that WebP lacks. With Chrome (since v85, 2020), Firefox (v93, 2021), Safari (v16.4, 2023), and Edge (v121, January 2024) all shipping native decoders, AVIF coverage is now ~94% per caniuse.com — close enough to WebP that the size win is worth the swap for most workflows.

• Cut CDN bills and Core Web Vitals time — AVIF's typical 20-30% reduction over WebP compounds across thousands of product images. Smaller bytes mean faster Largest Contentful Paint, which Google measures as a Core Web Vitals ranking signal.
• Preserve HDR photography — modern iPhones (Pro models from 14 onward), Pixels, and Galaxy flagships capture HDR. Re-encoding those to WebP forces an 8-bit SDR downgrade; AVIF retains 10-bit PQ/HLG with BT.2020 primaries.
• Replace <picture> fallbacks — if you ship <picture> with AVIF first, WebP second, JPEG third, you can now use this tool to add a pre-built AVIF tier without re-encoding from the original JPEG.
• Animated WebP swap-out — AVIF supports image sequences and animation in the same container, so animated WebPs can move to AVIF for the same size/quality wins (note: Firefox AVIF animation playback was historically limited).
• Photo libraries and stock catalogs — bulk re-encoding a 50,000-image WebP library to AVIF typically reclaims double-digit gigabytes of object storage at the default quality preset.
• Royalty-free distribution — AVIF's reference library libavif ships under BSD-2-Clause and the spec itself is open and royalty-free, the same license posture as WebP. No per-decode license fees, unlike HEIC.

WebP vs AVIF — Format Comparison

Quality Preset Quick Guide

Frequently Asked Questions

Will I actually see a size drop converting WebP to AVIF, or just re-pack the same bytes?

Real drop. WebP's VP8 still-image codec dates to 2010; AVIF's AV1 intra coding adds larger transform blocks, more prediction modes, and CDEF/loop-restoration filters that VP8 doesn't have. Across mixed photographic content, expect 20-30% smaller files at visually equivalent quality. The exception is line art and screenshots — WebP's dedicated VP8L lossless mode is very efficient there, so AVIF lossless may not beat it by much.

Does AVIF work in every browser my visitors use?

Native AVIF decoders ship in Chrome 85+ (Aug 2020), Firefox 93+ (Oct 2021), Safari 16.4+ (Mar 2023), and Edge 121+ (Jan 2024). caniuse.com/avif currently reports ~94% global support. The remaining gap is mostly older iOS (15 and below) and some locked-down corporate browsers. For belt-and-braces, serve AVIF inside a <picture> element with a WebP fallback — see AVIF to WebP for the reverse encode.

Why didn't my converted AVIF come out smaller than the WebP?

Two common reasons. First, your source WebP may have been very aggressively compressed already (quality 50 or below) — re-encoding cannot recover detail that's no longer there, and AVIF will just match the size. Second, very small images (under ~100×100 px) carry proportionally more container/header overhead, so the per-byte savings shrink. Try the Specific file size option with a target a few percent below the source to force the encoder.

Can I convert animated WebP to animated AVIF?

Yes. AVIF stores multi-frame content as ISOBMFF image sequences, which all four major browsers decode for the still case. Animation playback has been spottier historically — Firefox added animated-AVIF rendering in version 113, and Chrome/Safari support it natively. For maximum compatibility on busy social feeds you may still want WebP to GIF or WebP to MP4 instead, since GIF and MP4 have universal playback.

Does AVIF support transparency like WebP does?

Yes — AVIF carries a full alpha channel and supports both binary and 8/10/12-bit alpha. For logos, icons, and product cutouts that need transparency, AVIF generally produces noticeably smaller files than transparent WebP at the same quality, because AV1's intra prediction handles flat alpha regions efficiently.

Why is my AVIF taking longer to encode than the WebP did?

AV1 is a heavier codec than VP8. AVIF encoding can be 5-10× slower than WebP at equivalent quality because AV1 evaluates many more prediction and transform options per block. That cost is paid once at encode time; decode in the browser is comparable. Our converter runs on our servers so the wait scales with file size and CPU — large 4K photos may take several seconds each.

Will EXIF, ICC color profile, and orientation survive the conversion?

ICC color profile and EXIF metadata are preserved when present in the source WebP. Orientation tags are honored. If your WebP has no embedded profile, AVIF defaults to sRGB; for HDR re-encoding you'll want the source to carry BT.2020/PQ profile metadata so the AVIF output can flag it correctly.

Should I use lossless AVIF instead of lossy for archival?

Probably not. Lossless AVIF uses YUV 4:4:4 with no quantization and is competitive but rarely better than WebP lossless or PNG for archival masters. For archival, keep the original raster (PNG or original WebP lossless); use AVIF lossy for the delivery copy. If you need a smaller archival format, compress AVIF at Very High preset is usually within 1 dB PSNR of lossless at a fraction of the size.

How does AVIF compare to JPEG XL for my use case?

JPEG XL has stronger lossless performance and progressive decoding, but as of early 2026 it's still off by default in Chrome and Edge (behind a flag) and unsupported in Safari. AVIF has the deployment lead — ~94% global support versus JPEG XL's roughly 30% in browser-form availability. For public web delivery in 2026, AVIF is the safer choice; JPEG XL is currently more interesting for pro photography pipelines and archival.