Image to AVIF Converter

Encode PNG, JPG, or WebP images into next-gen AVIF — typically 30-50% smaller than JPG at the same visual quality — using a WebAssembly encoder that runs entirely in your browser. Free, no upload, with a quality slider and batch ZIP downloads.

How to convert an image to AVIF with Allypdf

  1. Add the PNG, JPG, or WebP images you want to shrink.
  2. Set the AVIF quality — 50 is a strong default for photos.
  3. Encode on your device; a background worker keeps the page responsive and shows progress.
  4. Compare the before/after sizes and download the AVIF files, individually or as a ZIP.

Why "no upload" matters here

The images people optimize for websites and portfolios are often client work, product shots, or personal photography that shouldn't detour through a stranger's server just to get smaller. Allypdf runs the same WASM AVIF codec Squoosh uses directly in your browser — the encode happens on your CPU, and the original never leaves your machine.

Common uses

  • Shrink website images dramatically for faster page loads and better Core Web Vitals.
  • Convert a product-photo library to AVIF for a storefront that supports modern formats.
  • Compress wallpaper or photography collections to save storage without visible quality loss.
  • Create small, sharp AVIF versions of blog and social images while keeping the originals local.

Frequently asked questions

How do I convert a PNG or JPG to AVIF for free?

Drop your images onto Allypdf's Image to AVIF tool, set the quality slider, and click Convert — the AVIF files download straight away, free and watermark-free. The encoder is WebAssembly running in your browser, so nothing is uploaded.

How much smaller is AVIF than JPG or WebP?

At comparable visual quality, AVIF files are typically 30-50% smaller than JPG and 20-30% smaller than WebP. Photos with smooth gradients benefit most; the results screen shows the exact savings for every image.

Why does encoding take longer than other converters?

AVIF trades encode time for file size — the compression is genuinely more work. The encode runs in a background worker on your device with live progress, so the page never freezes; a large photo may take some seconds.

Will AVIF files work everywhere?

Every modern browser displays AVIF (Chrome, Firefox, Edge, Safari 16+), making it ideal for the web. Some older desktop apps and upload forms don't accept it yet, so keep originals — or convert back with the AVIF to Image tool.

Are my photos uploaded during encoding?

No. The codec is bundled with this site and executes in your browser — the same approach Squoosh uses. Your images stay on your device, and the re-encode strips hidden EXIF metadata like GPS location from the output.

Related tools

  • Convert Image to WebP — Convert JPG or PNG to WebP free for faster websites. In-browser conversion, no upload, no quality tricks.
  • Compress Image — Reduce image file size free without visible quality loss. Compression runs in your browser — photos never leave your device.
  • Compress Image to 20KB, 100KB or Any Size — Reduce a JPG, PNG or WebP to 20KB, 100KB or any exact KB size free. Quality is auto-tuned in your browser — no upload, photos never leave your device.