Webmasters Gallery

AVIF (AV1 Image File Format) is a modern image file format specification for storing images that offer a much more significant file reduction when compared to other formats like JPG, JPEG, PNG, and WebP. Version 1.0.0 of the AVIF specification was finalized in February 2019 and released by Alliance for Open Media to the public.

In this article, you will learn about some browser-based tools and command line tools for creating AVIF images.

Why use AVIF over JPGs, PNGS, WebP, and GIF?

• Lossless compression and lossy compression
• JPEG suffers from awful banding
• WebP is much better, but there’s still noticeable blockiness compared to the AVIF
• Multiple color space
• 8, 10, 12-bit color depth

Caveats

Jake Archibald, wrote an article a few years back on this new image format and also helped us to identify some disadvantages to compressing images, normally you should look out for these two when compressing to AVIF:

1. If a user looks at the image in the context of the page, and it strikes them as ugly due to compression, then that level of compression is not acceptable. But, one tiny notch above that boundary is fine.
2. It’s okay for the image to lose noticeable detail compared to the original unless that detail is significant to the context of the image.

See also: Addy Osmani at Smashing Magazine goes in-depth on using AVIF and WebP.

Browser Solutions

Squoosh

Squoosh is a popular image compression web app that allows you to convert images in numerous formats to other widely used compressed formats, including AVIF.

Features

• File-size limit: 4MB
• Image optimization settings (located on the right side)
• Download controls – this includes seeing the size of of the resulting file and the percentage reduction from the original image
• Free to use

AVIF.io

AVIF.io is an image tool that doesn’t require any form of code. All you need to do is upload your selected images in PNG, JPG, GIF, etc. and it would return compressed versions of them.

Features

• Conversion settings (located on the top-right of upload banner)
• Free to use

You can find answers to your questions on the AVIF.io FAQ page.

Command Line Solutions

avif-cli

avif-cli by lovell lets you take AVIF images stored in a folder and converts them to AVIF images of your specified reduction size.

Here are the requirements and what you need to do:

• Node.js 12.13.0+

Install the package:

npm install avif

Run the command in your terminal:

npx avif --input="./imgs/*" --output="./output/" --verbose

• ./imgs/* – represents the location of all your image files
• ./output/ – represents the location of your output folder

Features

• Free to use
• Speed of conversion can be set

You can find out about more commands via the avif-cli GitHub page.

sharp

sharp (also maintained by lovell) is another useful tool for converting large images in common formats to smaller, web-friendly AVIF images.

Here are the requirements and what you need to do:

• Node.js 12.13.0+

Install the package:

npm install sharp

Create a JavaScript file named sharp-example.js and copy this code:

const sharp = require('sharp')

const convertToAVIF = () => {
    sharp('path_to_image')
    .toFormat('avif', {palette: true})
    .toFile(__dirname + 'path_to_output_image')
}

convertToAVIF()

Where path_to_image represents the path to your image with its name and extension, i.e.:

./imgs/example.jpg

And path_to_output_image represents the path you want your image to be stored with its name and new extension, i.e.:

/sharp-compressed/compressed-example.avif

Run the command in your terminal:

node sharp-example.js

And there! You should have a compressed AVIF file in your output location!

Features

• Free to use
• Images can be rotated, blurred, resized, cropped, scaled, and more using sharp

See also: Stanley Ulili’s article on How To Process Images in Node.js With Sharp.

Conclusion

AVIF is a technology that front-end developers should consider for their projects. These tools allow you to convert your existing JPEG and PNG images to AVIF format. But as with adopting any new tool in your workflow, the benefits and downsides will need to be properly evaluated in accordance with your particular use case.

I hope you enjoyed reading this article as much as I enjoyed writing it. Thank you so much for your time and I hope you have a great day ahead!

---

Useful Tools for Creating AVIF Images originally published on CSS-Tricks. You should get the newsletter.