ImagePilot

Convert Image to AVIF Online

AVIF often beats WebP when it comes to compression. Use ImagePilot to convert your existing images to AVIF and keep your project lightweight — it works right in your browser, in any modern browser.

Last updated: August 2026

Drop your images here or click to select

Supports JPG, PNG, WebP and AVIF

AVIF is the smallest of the mainstream image formats, and the margin over WebP is real rather than marginal — particularly for photographic content at web quality levels. If page weight is the thing you are optimising, this is the format that gets you furthest. It also supports transparency and wide colour, so it is not a photographs-only choice the way JPEG is.

It is worth knowing how the conversion actually happens here, because AVIF is a special case. No browser can produce AVIF through the standard canvas export path — they all quietly fall back to PNG if you ask. So AVIF encoding runs through a WebAssembly encoder loaded on demand instead. The practical upshot is that it works in any browser that can run WebAssembly, whether or not that browser has its own AVIF encoder, and that encoding takes noticeably longer than JPEG or WebP. That wait is the encoder doing real work, not something stalling.

The trade is the same one every new format asks for: efficiency now, compatibility later. Browsers handle AVIF, but desktop applications, upload forms and older devices frequently do not — which is why people keep arriving at converters looking to turn .avif files back into JPGs. AVIF is an excellent choice for images you are serving from a website you control. It is a poor choice for a file you are emailing to someone.

How to convert an image to AVIF

  1. 1

    Add your images

    JPG, PNG, or WebP all work as sources. Everything is decoded in your browser, and nothing is uploaded at any stage.

  2. 2

    Choose AVIF as the output

    The option appears whenever your browser can run the WebAssembly encoder, which in practice is any current browser. If AVIF is not offered, that is why.

  3. 3

    Set the quality and allow time

    Around 60 to 75 percent produces files noticeably smaller than WebP at similar visible quality. Encoding takes longer than other formats — a few seconds per image is normal.

  4. 4

    Download and compare

    Check the size against your original. The saving is largest on photographic content and smaller on flat graphics, which were already compressing well.

Pro tip: Serve AVIF, do not send it. The right place for this format is a website you control, where you can offer AVIF to browsers that accept it and fall back to JPEG or WebP for anything that does not — that is what the picture element and content negotiation exist for. Converting your whole photo library to AVIF because it is smaller creates a collection that your own desktop software may not open, and undoes the benefit the moment you need to share one. Keep an original in a widely supported format.

Troubleshooting: If AVIF is not offered as an output format, your browser cannot run the encoder — a current browser resolves it. If conversion feels slow, that is expected: AVIF encoding is computationally heavier than JPEG or WebP, and the wait scales with image size. If the AVIF is not much smaller than your source, the image is probably flat graphics rather than photographic, where the format has less to gain. And if a recipient cannot open the file you sent, that is the compatibility trade rather than a fault — Convert AVIF to JPG gives them something that works.

For a format with the same benefits and wider software support, Convert PNG to WebP and Convert JPG to WebP. To go back the other way, Convert AVIF to JPG and Convert AVIF to PNG. To reduce an AVIF that is already AVIF, Compress AVIF Online. For the whole-site picture, Online Image Optimizer for Websites, and JPG vs WebP vs AVIF works through when each format wins.

Frequently asked questions

How do I convert an image to AVIF?

Add your JPG, PNG, or WebP files above, choose AVIF as the output format, set a quality level, and download. Encoding runs through a WebAssembly encoder in your browser, so it works without uploading anything — just allow a few seconds per image.

Why does AVIF conversion take longer than other formats?

Because AVIF encoding is genuinely more computationally demanding, and because no browser can produce AVIF through the standard canvas export — a WebAssembly encoder does the work instead. The extra seconds are the encoder running, which is also what produces the smaller file.

Is AVIF better than WebP?

For file size at comparable visible quality, generally yes, especially for photographs. For compatibility, WebP is ahead — it has been around longer and more software supports it. The right answer depends on whether you are optimising a website you control or producing a file someone else has to open.

Should I convert all my images to AVIF?

For a website, converting the images you serve is worth doing, with a fallback for browsers or clients that cannot handle it. For your personal library, no — you would end up with files your own desktop software may not open, and you would need to convert back every time you shared one.

Are my images uploaded when converting to AVIF?

No. The WebAssembly encoder runs inside your browser on your own device, so the image never leaves your machine. The encoder itself is downloaded once, on first use, and the images are not sent anywhere at any point.

Looking for the full-featured version? Open the main Convert Image tool.

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