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WEBP to AVIF converter

Convert WEBP to AVIF in your browser. No upload and no account: the file never leaves your device, so the only size limit is your device’s memory.

I want AVIF
70%
Icon sizes
How to make the SVG

Tracing suits logos, icons and flat artwork and scales cleanly. Photos are better kept as pixels inside the SVG.

16
50%
Dither Scatters black dots to suggest gray, instead of a hard cut-off.
Advanced 5
Keep the animation For animated GIF, WebP and APNG sources. Turn off to save just the first frame.
Rotate
Mirror horizontally
Mirror vertically

For an exact width and height, use the Resize Image tool instead.

Bytes of your files sent anywhere: 0 B

Related conversions

Need it the other way round? Convert AVIF to WEBP

Other ways to convert WEBP

Convert other formats to AVIF

Read more about the WEBP format and the AVIF format, or see every image tool and all image conversions.

Should you convert WEBP to AVIF?

You’re squeezing more speed out of a website that already uses WebP.

A safe conversion when AVIF is what you need: both WEBP and AVIF keep every pixel, so the picture itself doesn’t change.

WEBP is a web image format that can be lossy or lossless, with transparency and animation; AVIF is a modern image format that squeezes photos smaller than WebP. Use AVIF for photos on a website when you want the smallest files and can serve a fallback to older browsers.

WEBP and AVIF compared
Property WEBP AVIF
Compression Lossy or lossless Lossy or lossless
Transparency Yes Yes
Animation Yes Yes
Support Opens in current browsers and apps Opens in current browsers and apps
Best for Images on websites, where smaller files load faster The smallest possible photos on a modern website
Introduced 2010 2019

How to convert WEBP to AVIF

  1. 01

    Add your WEBP

    Drop your WEBP image onto the box, or click to choose it. It is read from your disk and stays there.

  2. 02

    Check the settings

    The output is already set to AVIF. Change the quality if you want to; the defaults suit most files.

  3. 03

    Save the AVIF

    Press convert and save the AVIF. Several files come back together as a ZIP.

What changes when WEBP becomes AVIF

Transparency is kept

WEBP and AVIF both support transparency, so transparent backgrounds and soft edges come through unchanged.

Animated files keep their first frame

AVIF can animate, but this converter writes animated AVIF only for GIF and APNG targets. An animated WEBP is saved as a still of its first frame.

Expect a smaller file

AVIF usually stores the same content in less space than WEBP. WEBP: Typically 25–35% smaller than the same JPG. AVIF: Often around half the size of the equivalent JPG.

This page is put together from our notes on each format, choosing only what is true of WEBP and AVIF, so every pairing states the same facts the same way. How these pages are made.

Why it doesn’t upload

Changing a picture’s format is work your browser already knows how to do. Sending your photos to a server first only adds waiting and risk, so nothing is sent.

How to check for yourself

Worth knowing

  • About the WEBP. Images saved from websites arrive as WEBP even when the page looked like it showed a JPG, and then a document editor or upload form refuses them.
  • About the AVIF. AVIF’s savings are real, but encoding is slow, so a batch that takes seconds as JPG can take minutes as AVIF.
  • DDS, PSD, EXR, XWD and JPEG 2000 are read by the FFmpeg engine, a one-time 31 MB download.

Questions

Will converting WEBP to AVIF lose quality?

AVIF is lossy, so some detail is discarded. The quality slider decides how much; the default of 90 is chosen so the difference is invisible in almost every photo.

Will the AVIF be smaller than the WEBP?

Expect a smaller file. AVIF usually stores the same content in less space than WEBP. WEBP: Typically 25–35% smaller than the same JPG. AVIF: Often around half the size of the equivalent JPG.

Read more about this

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