WebP to AVIF Converter

Re-encode WebP images as AVIF to squeeze out further file-size savings while keeping transparency and gaining wide colour support.

Why convert WebP to AVIF?

Both formats are modern and both support transparency, so this is a pure efficiency upgrade. AVIF's newer codec generally produces smaller files than WebP at comparable visible quality.

AVIF additionally supports wide colour gamut and high dynamic range, which WebP handles less well — worth having if your images are vivid photography or rich illustration.

Transparency: Fully preserved. Both formats support a complete alpha channel, so partial transparency converts without artefacts.

Diagram showing a WebP image being converted to AVIF with QuickConvertPDF

What you get converting WebP to AVIF

Smaller again than WebP

AVIF typically compresses harder at similar visible quality.

Transparency retained

The alpha channel carries across cleanly between the two formats.

Wider colour and HDR

AVIF can express colour that WebP's 8-bit pipeline cannot.

Smoother gradients

Banding is less visible at aggressive compression levels.

What to expect: Savings are real but more modest than converting from JPG or PNG, since WebP is already efficient. Encoding takes longer than WebP because AVIF does more work.

When to convert WebP to AVIF

Squeezing the last few kilobytes out of an optimised site
Upgrading an existing WebP image library to a newer format
Serving AVIF first with a WebP fallback in a picture element
Delivering vivid photography that benefits from wide colour

WebP vs AVIF

	WebP	AVIF
Compression	Lossy	Lossy
Transparency	Yes	Yes
Best for	a modern Google format that keeps transparency while cutting file size well below JPG and PNG	the newest of the mainstream formats, offering the smallest files plus transparency and wide colour

WebP to AVIF — frequently asked questions

If page weight really matters, yes — AVIF is usually smaller at similar quality. If your WebP files are already small and performing well, the gain may not justify the work.

Yes. Both WebP and AVIF support a full alpha channel, so transparency transfers cleanly.

Slightly, since the image is re-encoded. Keep quality reasonably high, and re-encode from your original master where you still have it.

WebP support is a little broader in older software. All current mainstream browsers handle both, so many sites serve AVIF with a WebP fallback.

AVIF's encoder is far more complex than WebP's. The extra processing time is what buys the smaller file.

Yes, if you need a fallback for older clients. Serving both via a picture element is a common pattern.

Related tools

AVIF to WebP WebP to JPG PNG to AVIF Compress Image

Who benefits from converting WebP to AVIF?

These are common examples; the right workflow depends on the file, required output, and your organization’s handling rules.

Front-end developers

Test highly compressed modern images in a browser-focused delivery workflow. A typical use is squeezing the last few kilobytes out of an optimised site.

Performance teams

Compare AVIF size and visual quality with JPG or WebP alternatives. A typical use is upgrading an existing WebP image library to a newer format.

Digital publishers

Prepare efficient photographs for audiences using current browsers. A typical use is serving AVIF first with a WebP fallback in a picture element.

Image archivists

Create a space-conscious derivative while keeping the original master file. A typical use is delivering vivid photography that benefits from wide colour.