WebP & AVIF Converter

Yes, in every modern browser, because this tool does not rely on the browser to encode AVIF at all. No browser ships an AVIF encoder for web pages, which is why many converters silently fail or fall back. Here the encoding runs in a WebAssembly build of the reference AVIF encoder, downloaded on demand and executed locally. Every AVIF output is signature-checked and independently decoded before you get it, so a broken file can never download silently.

WebP when compatibility and speed matter: it is supported everywhere, encodes fast, and typically cuts 25 to 35 percent versus JPEG. AVIF when bytes matter most: it usually lands another 20 to 40 percent below WebP on photos, at the cost of much slower encoding and patchier support in older software. Both handle transparency, so either replaces PNG for graphics on the web. There is no universal answer; convert the same image both ways here and compare the sizes and pixels yourself.

Quality scales are not comparable between codecs. Quality 80 in JPEG, WebP and AVIF are three unrelated numbers that happen to share a label; each codec maps its scale to its own compression decisions. That is also why size results differ between tools even at the same setting. Use the target-file-size mode when you need specific bytes, or compare outputs visually instead of trusting the number.

Up to 20 files per batch, admitted by decoded size rather than a marketing no-limits claim: each image's header is read first, its decoded RGBA memory is estimated, and files that would exceed this device's memory budget are refused with the math shown before any decoding happens. Animated images are refused rather than silently flattened to one frame. This is what keeps a huge or hostile file from freezing the tab.

Yes, fully: both formats support an alpha channel and the converter keeps it. Only JPEG cannot store transparency; if you convert a transparent PNG to JPEG, the tool detects the alpha with a full-resolution scan, flattens onto a matte color you choose, and says so on the result card. Nothing is flattened silently.

Files never leave your machine; decoding and encoding are local, and there is no upload, account or queue. Output files have EXIF, GPS location and other metadata stripped, and orientation is applied first so the pixels stay upright. If you need metadata preserved through conversion, use a desktop tool; a metadata-preserving mode here would be explicit, never silent.

WebP since WordPress 5.8, and AVIF since WordPress 6.5, provided the server's image library supports it (recent GD or Imagick builds do). If an AVIF upload fails on your site, the host's image library is usually the missing piece. Converting before upload with this tool sidesteps that entirely, since WordPress serves whatever you upload.

Not directly; Google does not rank pages for using a specific image format. The honest chain is: smaller images make pages faster, speed feeds Core Web Vitals like Largest Contentful Paint, and those are ranking signals with real but modest weight. The bigger wins are usually user experience and lower bandwidth bills. PageSpeed Insights flags heavy JPEG and PNG files and recommends next-gen formats; converting is how you clear that audit, not a ranking trick.