Filenary

WEBP to AVIF Converter

Convert WebP image files to AVIF image right in your browser — free, private and with no size limit.

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This file is processed in your browser and never uploaded to a server.

How to convert WEBP to AVIF

  1. 1Drop your WEBP file into the box above, or click to choose it from your device.
  2. 2Click Convert. The conversion runs locally in your browser — nothing is uploaded.
  3. 3Download your new AVIF file as soon as it's ready.

Why convert WEBP to AVIF?

Some older apps, editors and upload forms still don't accept WebP files. AVIF gives the smallest file sizes of any common image format at high quality.

Why people make this conversion

AVIF squeezes another 20–30% out of WebP's savings. Sites with thousands of images feel that in bandwidth bills.

The size math: WEBP vs AVIF

A single 12 MP photo (4000×3000) weighs about 3.6 MB as WEBP and 2.7 MB as AVIF — your AVIF file comes out about 1.3× smaller, and that is before touching any quality slider.

What is WEBP?

WebP is a modern image format by Google that makes images 25–35% smaller than JPG or PNG at the same quality, with transparency support.

  • MIME type: image/webp
  • Released: 2010 by Google
  • Compression: VP8-based, typically 25–35% smaller than JPG
  • Supports: lossy, lossless, alpha and animated frames
  • Now served by Chrome, Firefox, Safari and Edge

What is AVIF?

AVIF is a next-generation image format based on the AV1 codec. It delivers even smaller files than WebP with excellent quality and HDR support.

  • MIME type: image/avif
  • Released: 2019 by the Alliance for Open Media
  • Compression: AV1 intra-frames — around 50% smaller than JPG
  • Supports: 12-bit color depth, HDR and alpha
  • Browser support: Chrome 85+, Firefox 93+, Safari 16+

Frequently asked questions

Is this WEBP to AVIF converter free?
Yes, it's completely free with no sign-up, no watermark and no daily limits.
Are my WEBP files uploaded to a server?
No. The conversion happens entirely inside your browser, so your files never leave your device.
Is there a file size limit?
Filenary sets no limit — even files over 1 GB work. The only practical limit is your device's memory.
Will converting WEBP to AVIF reduce the quality?
AVIF uses lossy compression, so the file becomes smaller with a small, usually invisible, loss of detail. Settings are tuned to keep the result sharp.
Can I convert several WEBP files at once?
Yes. Drop as many WEBP files as you like and they're converted one after another, then download them together.
Does it work on iPhone, Android, Mac and Windows?
Yes. It runs in any modern browser — Chrome, Safari, Edge or Firefox — on phones, tablets and computers, with nothing to install.

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Add this tool to your website

Copy the code below and paste it into any page. It's free, needs no sign-up, and files are processed in your visitors' own browsers.