AVIF to WebP Converter

AVIF to WebP conversion here happens entirely in your browser, so the image bytes never leave your device, with no upload to any server. Most people reach this page because a CMS, marketplace, older Safari version, or some downstream tool refuses to open or display their AVIF, and WebP is the "next-gen" fallback they already know works everywhere. This converter re-encodes AVIF into WebP locally and gives you an honest quality slider, so you control the compatibility-versus-fidelity tradeoff yourself.

What this conversion actually does (and does NOT do)

This is a transcoding step, not a compression win, and that surprises most people. AVIF compresses better than WebP, so re-encoding an AVIF to WebP at the same visual quality typically makes the file about 10 to 50 percent LARGER, not smaller. If your goal was to save bytes, converting to WebP is the wrong move; the legitimate reason to do it is compatibility, since WebP is supported in essentially all modern browsers and many CMS and marketplace platforms that still choke on AVIF.

Transparency carries over cleanly. AVIF supports an 8-bit alpha channel in both lossy and lossless modes, and WebP is one of the few formats that keeps alpha transparency even for lossy images, so a transparent AVIF converts to WebP without being flattened onto a background. The one real downgrade is color depth. AVIF supports 8, 10, and 12-bit color plus HDR and wide color gamut, while WebP is 8-bit only, so converting a 10 or 12-bit HDR AVIF loses luminance headroom and wide-gamut color, and you may see banding in skies or gradients.

Quality loss is generational. Lossy AVIF to lossy WebP means data already discarded by AVIF cannot be recovered, and the WebP pass adds a second lossy encode on top. Use quality 85 or higher for visually transparent results. The WebP is always lossy here (there is no lossless option), so if you need a pixel-faithful copy, convert to PNG instead. Also note that the browser decodes the AVIF at 8 bits per channel, and an animated AVIF gives a static WebP of its first frame only.

When to choose AVIF to WebP vs the alternative

Choose WebP when you need the widest practical compatibility while still keeping transparency, for example product shots or UI assets that must render in older Safari and a CMS that rejects AVIF. If the receiving platform only accepts classic formats and you do not need an alpha channel, a flat format may be simpler instead; for photos without transparency you can convert AVIF to JPG (or JPEG), which every tool on earth opens. If you need a guaranteed lossless raster with transparency for editing, use AVIF to PNG rather than a lossy target. The decision is mostly about what the downstream tool accepts and whether transparency matters.

How to convert

1. Drop one or many AVIF images into the converter (they are read locally, never uploaded).
2. The output format is pre-selected to WebP; the quality slider applies (90-95 for near-lossless, 75-85 for the web sweet spot). If your browser cannot encode lossy WebP, a lossless WebP is produced instead and a note says the slider did not apply.
3. Transparency is preserved because WebP supports alpha, so transparent AVIFs convert without a background fill.
4. Click Convert; a single file downloads directly, while multiple files download as a ZIP with no count cap.

No upload. It runs on your device.

The conversion uses your browser's own codecs: its AVIF decoder reads the image (all current major browsers support AVIF) and its canvas encoder writes the lossy WebP. If the browser cannot encode lossy WebP, a Rust module compiled to WebAssembly writes a lossless WebP instead. Everything runs inside your browser tab. There are zero network requests for the image itself, the tool keeps working offline after the page has loaded (disconnect and try it), and there is nothing to delete afterward because nothing was ever uploaded. You can verify this yourself in the DevTools Network tab while you convert. AVIF files often hold personal photos, screenshots, or product images you would rather not hand to a stranger's server, and here they never leave the machine.

No limits

Unlimited batch conversion, no file-size or file-count cap, no watermark on the output, no sign-up, and no ads. Convert one AVIF or a few hundred in a single pass.

Frequently asked questions

Why is my WebP file bigger than the original AVIF?

AVIF uses a more efficient codec than WebP, so re-encoding at the same visual quality usually produces a file roughly 10 to 50 percent larger. Converting to WebP is about compatibility, not saving space, and that size increase is expected rather than a bug.

Does converting AVIF to WebP lose quality?

Lossy AVIF to lossy WebP is generational loss, because data AVIF already discarded cannot be recovered and the WebP pass adds a second lossy encode. Use quality 85 or higher for visually transparent results, or convert to PNG if you need a pixel-faithful copy, since this page always outputs lossy WebP.

Why convert AVIF to WebP instead of keeping AVIF?

The main reason is compatibility: WebP is supported across essentially all modern browsers and many CMS and marketplace platforms, while AVIF arrived later and some tools and older Safari versions still cannot display it. If your AVIF will not open or upload somewhere, WebP is the broadly-accepted fallback.

Is converting AVIF to WebP done without uploading my files?

Yes, the conversion runs entirely in your browser, using its built-in AVIF decoder and WebP encoder (with a Rust/WebAssembly lossless fallback), so the image bytes never reach a server. You can confirm there are no uploads by watching the DevTools Network tab while you convert.

Can I batch convert multiple AVIF files to WebP at once?

Yes, drop as many AVIF files as you like in a single pass with no file-count cap. A single file downloads directly, and multiple files are bundled into a ZIP for you.

Does AVIF to WebP keep transparency?

Yes, WebP supports an alpha channel even for lossy images, so a transparent AVIF converts cleanly without being flattened onto a background color. This is one of the few format pairs where transparency survives a lossy re-encode.

Does it convert animated AVIF to animated WebP?

No. The format pair allows it, but this converter decodes through the browser canvas, which reads only the first frame. An animated AVIF becomes a static WebP of that first frame.

What quality setting should I use for AVIF to WebP?

Use 80 to 85 for general web use and 90 to 95 for fidelity-critical work. If you need zero loss and do not mind a larger file, convert to PNG instead, because this page has no lossless WebP option.

Is the AVIF to WebP converter free with no watermark or limits?

Yes, it is free with no watermark, no daily limits, no sign-up, and no ads. There is no file-size cap and no restriction on how many files you convert.

Can I convert AVIF to WebP offline?

Yes, once the page has loaded everything runs on your browser's built-in codecs and the cached WebAssembly module, so you can disconnect from the network and conversions still run. Nothing is uploaded, so an internet connection is not required for the actual work.

Related tools: convert the other direction with WebP to AVIF, send photos to a universally-opened format with AVIF to JPG, or browse the full image tools hub.