How much smaller will my AVIF files be compared to PNG?

AVIF files are significantly smaller than PNG at the same dimensions. In my tests, they were consistently over 95% smaller with the default settings. I got the biggest savings from graphic images that have transparent backgrounds. Photographs get slightly lower savings, at around 85 to 95%, and that is without resizing the photo. The ConvertYard PNG to AVIF converter shows you potential savings in the preview windows (at least for the first three images), so you know how much smaller the file can become and see a preview of how it looks in AVIF format.

Should I use lossy or lossless mode for PNG to AVIF?

Here’s the formal guideline: use lossless mode for images that require pixel-perfect accuracy, like logos, icons, screenshots, UI mockups, and anything with text-heavy images. Use lossy mode for photographs, illustrations with gradients, or any photographic image. But you can also use lossy mode for text-heavy images at the default quality setting, and you won’t notice any quality loss. You can also preview the image before conversion.

Does AVIF support transparency like PNG?

Yes. AVIF files support alpha channel transparency like PNG and these will be preserved by default when you convert your files to AVIF. Every major browser is compatible with AVIF transparency.

What browsers support AVIF?

Chrome (v85+), Firefox (v93+), Edge (v121+), and Safari (v16.4+). That covers over 93% of global web traffic. For maximum compatibility, use a element with AVIF as the preferred source and PNG as the fallback.

Why does AVIF encoding take longer than WebP or PNG?

Since AVIF uses the AV1 codec that prioritizes maximum compression over speed, encoding a large PNG file to AVIF will take longer- around 2 to 10 times longer than a WebP file. If you want to speed up the conversion, reduce the effort slider between 0 and 2. On the flip side, AVIF files decode quickly, and these images load fast in browsers, which is the main reason you want to convert PNG files to this format.

Are my files uploaded to your servers?

Nope. Nothing is uploaded to a server. Everything runs directly in your browser using WebAssembly. Your PNG files don’t leave your device. How many files you can convert in a batch will depend on your processor speed and memory.

PNG to AVIF Converter

Best for front-end developers replacing PNG files with AVIF to cut file size so the page loads fast in modern browsers.

Files never leave your browser. No uploads. No accounts.

Drop files or a folder here

or click to browse · paste from clipboard

Accepts .PNG · Up to 1,000 files

PNG to AVIF format. Get the same quality with over a 90% reduction in file size. Convert your entire library without uploading anything to an unknown server.

How it works

Drop your files
Drag and drop, click to browse, or paste from clipboard. Up to 1,000 files at once.
Choose settings
Adjust quality, compression effort, and other options to match your needs.
Click Convert
Everything runs in your browser via WebAssembly. PNG to AVIF Converter happens locally — no server involved.
Download
Download files individually or grab all at once as a ZIP.

What is PNG?

PNG (or Portable Network Graphics) is a legacy image format created in 1995 by the PNG Development Group as a free, open-source replacement for GIF when Unisys initially wanted companies to pay royalties to use LZP (basically the algorithm that reads GIF files). This format is excellent for folks who want clear and crisp graphic images with sharp edges and clear lines, such as logos, UI, screenshots, or icons with a transparent background.

PNG is a lossless format, meaning every pixel is encoded without any distortion. It won’t look blurry when you zoom in, but a downside of fully lossless images is that they are large, and using them on websites can slow load times and take up more storage space, driving up web hosting costs.

What is AVIF?

AVIF (or AV1 Image File Format) is a modern image format based on the AV1 video codec. It was designed as an alternative that delivers high-quality images without the bloat of older formats like PNG or JPG. Like PNG, AVIF supports transparent backgrounds. It also supports a wide color range and HDR, and is now supported by nearly every browser on Windows, Mac, Android, and iOS (Chrome, Safari, Firefox, and Edge). This means that you can convert PNG to AVIF and keep sharp image quality while reducing image size by over 95% (based on tests), and your visitors will see these images without any special software to read them.

Why convert PNG to AVIF?

The primary reason is to reduce file size. An AVIF image with the same dimensions and image quality can be over 95% smaller than a PNG. For example, a 6.5 MB PNG, a high-resolution graphic converted to PNG, will be around 250 KB, or 96% smaller with the same visual quality. That alone makes this conversion worth it if you want to upload these images on a website. The reduction in size will make your website load faster and lower web hosting costs since AVIF files are much smaller. Your visitors will be happier because they won’t have to wait as long for images to load, and search engines will reward your website with more organic traffic. AVIF supports transparent backgrounds, which is great for logos or icons.

When should I keep PNG instead?

Retain the PNG file if you need to send the graphic or photo to someone who still uses old software, or if you want to print the graphic. Most print shops will only accept legacy formats like PNG, TIFF, or JPG. Another reason is if you’re planning to edit the file and need a copy for future use. Otherwise, use AVIF for an image you’ll upload on your website.