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awxkee/avif.swift v1.3.1
A Swift package to encode and decode AVIF (AV1) images in iOS and MacOS, MacCatalyst, TvOS, WatchOS
⭐️ 12
🕓 4 weeks ago
iOS macOS watchOS tvOS macCatalyst
.package(url: "https://github.com/awxkee/avif.swift.git", from: "v1.3.1")


What's This?

Introducing AVIF.swift, the ultimate image decoding solution for AVIF images on iOS and macOS. The AVIFDecoder.decode method allows you to easily read and write AVIF images using the power of Swift. With AVIF.swift, you can decode AVIF images with up to 50% smaller file sizes and 25% better compression than JPEG, all while maintaining the highest quality. This package is compatible with both Swift Package Manager and CocoaPods. Try AVIF.swift today and see the difference for yourself. Check it out at https://github.com/awxkee/avif.swift

This package is provides full (compatibility support) for AVIF images for all apple platforms. Supports encode AVIF and decode AVIF images in convinient and fast way

A package to display AVIF on iOS, MacOS, Catalyst, WatchOS, tvOS or encode AVIF images. Also provider AVIF support for Nuke. Have support for older versions of iOS, WatchOS, MacOSX, tvOS, Catalyst and all the simulators that doesn't have support for AVIF images

Package based on dav1d to have the best speed of decompressing on devices that do not have support for AV1 hardware codec. As AVIF encoder have aom as just this one looks reasonable to encode AVIF images on mobile devices
Main aim of the project is to use AVIF image on all Apple platforms etc with usable speed and convenience

Supports animated AVIF's with realtime FPS like 24+ Also supports encoding animated AVIF's

Precompiled for iOS 11+, Mac OS 12+, Mac Catalyst 14+, WatchOS 6+, tvOS 13+


Swift Package Manager

Go to File / Swift Packages / Add Package Dependency… and enter package repository URL https://github.com/awxkee/avif.swift.git, then select the latest master branch at the time of writing.


import avif
// Decompress data
let uiImage: UIImage? = AVIFDecoder.decode(Data(), sampleSize: .zero) // or any max CGSize of image
// Compress
let data: Data = try AVIFEncoder().encode(image: UIImage())

// Decode animated
let animatedDecoder = AnimatedDecoder(withData: Data())
let frame: CGImage = try animatedDecoder.get(frame: 1)
let image: UIImage = try animatedDecoder.getImage(frame: 1) 

// Encode animation
import avifc

let animatedEncoder = AVIFAnimatedEncoder()
try animatedEncoder.addImage(UIImage(), duration: 250)
let encodedData = animatedEncoder.encode()

Nuke Plugin

If you wish to use AVIF with Nuke you may add avifnuke library to project and activate the plugin on app init

import avifnuke


let imageView = UIImageView()
let avifimageURL = URL(string: "https://bestavifdomain.com/sample.avif")!
Nuke.loadImage(with: url, into: imageView)

SDWebImage Plugin

If you wish to use AVIF with SDWebImage you may use provided plugin

import SDWebImage
#if canImport(avif)
import avif

public class SDWebImageAVIFCoder: NSObject, SDImageCoder {
    public func canDecode(from data: Data?) -> Bool {
        guard let data else { return false }
        return data.isAVIFFormat

    public func decodedImage(with data: Data?, options: [SDImageCoderOption : Any]? = nil) -> UIImage? {
        guard let data else {
            return nil
        return AVIFDecoder.decode(data)

    public func canEncode(to format: SDImageFormat) -> Bool {
        return true

    public func encodedData(with image: UIImage?, format: SDImageFormat, options: [SDImageCoderOption : Any]? = nil) -> Data? {
        guard let image else {
            return nil
        return try? AVIFEncoder.encode(image: image, quality: 50)

    public override init() {

And after register the plugin


Currently, avif nuke and SDWebImage plugin do not support animated avifs so you have to do it yourself


#AVIF Alliance for Open Media has developed the AVIF image format, a format that makes images have a smaller file size than with JPEG, PNG, GIF, or HEIF, without sacrificing image quality. AVIF offers lossy and lossless compression and has already 70% support by web browsers. It is regarded as a significant advancement in media compression. It is the goal of AOMedia to create open, royalty-free software standards for multimedia distribution. Specifically, AVIF will be free for everyone to use. There is a long list of big companies behind AOMedia, including Netflix, Google, Facebook, Apple, and Microsoft. In terms of image file formats for the web, JPG and PNG are considered the most popular. Several years ago, Google developed a format called WebP that delivers images 30% smaller than JPGs, while maintaining image quality. With AVIF, images are 50% smaller than JPG while maintaining the same quality.


  • ☐ Tests
  • ☐ Some examples


Stars: 12
Last commit: 2 weeks ago
jonrohan Something's broken? Yell at me @ptrpavlik. Praise and feedback (and money) is also welcome.

Release Notes

Release 1.3.7
2 weeks ago

Improving decoding speed

Swiftpack is being maintained by Petr Pavlik | @ptrpavlik | @swiftpackco | API | Analytics