WebP to AVIF Converter

Add your WebP files — drag in or click to browse.

Set the quality — choose a level; transparency is preserved.

Convert and download — save each AVIF, or click Download All as ZIP.

Usually only modestly. Both are efficient; AVIF can be a little smaller at the same quality, but the gain is smaller than going from JPG/PNG. The main reasons to convert are standardising on AVIF or squeezing out a final bit of size.

Yes. Both WebP and AVIF support an alpha channel, so any transparency in your WebP is preserved in the AVIF without flattening or filling the background.

Yes. The page carries its own AVIF encoder (libavif, compiled to WebAssembly), so it doesn't need the browser to support making AVIF. The encoder is a 3.5 MB download the first time you convert. After that, a large photo takes around 10 seconds on a phone. Nothing is uploaded.

Most modern browsers display AVIF (Chrome, Firefox, Edge, recent Safari). For older browsers, WebP has even broader support, so keeping a WebP fallback is sensible.

AVIF supports lossy and lossless. The quality slider sets lossy compression for the smallest files; a high setting stays visually close to the source. Re-compressing an already-lossy WebP can lose a little detail, so use a high quality.

Mostly to standardise on AVIF for a project or to shave a little more off image weight for performance. If you don't have a specific reason, WebP is already small and very widely supported.

No. The converter runs entirely in your browser using the HTML5 Canvas, so your files are processed on your own device and never uploaded. Nothing is stored once you close the tab. That keeps your images private and makes conversion fast, because there's no upload or download to a server.

Yes. Drag in a whole batch and the tool converts them all locally. Download each result from its card, or click "Download All as ZIP" to save the entire set in one folder. There's no cap on the number of files beyond your device's memory.

Yes. It runs in your phone's browser with nothing to install, so you can convert files on Android or iOS and download the result. Small batches convert quickly; very large or high-resolution sets use more memory and are smoother on a computer, but everyday conversions work fine on mobile.

There's no artificial cap or paywall, because nothing is uploaded — the work happens on your device. The practical limit is your device's memory. A large batch of high-resolution images uses more memory and is smoother on a computer, but everyday conversions run quickly even on a phone.

No. There's nothing to download or install and no account to create. The converter runs in any modern web browser, on any operating system, so you don't need a desktop image editor or codec. Just open the page, add your files, and convert.

Yes, it's completely free with no account and no limits, and it adds no watermark — what you download is clean. Because everything runs locally in your browser, there's no paywall and no usage cap.

Yes. Once the tool has finished, a Send to button sits beside Download. Pick another tool and it opens with the result already loaded: no second download, no re-upload. Suggested next steps for this AVIF image: Image Compressor, Image Resizer, Image Cropper and Merge Images. The handover stays on your device, held in this browser for a few seconds while the next tool opens, then deleted.