Kingfisher vs SDWebImage
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
A Swift library that downloads, caches, and displays images from the web in apps.
Open source · MIT
Loads, caches and displays web images on Apple platforms, with a UIImageView-style API.
The short answer
Choose Kingfisher if you need…
- iOS or macOS developers who need to show remote images in lists or detail screens
- Teams building SwiftUI apps that display images from URLs
- Developers who want caching and resizing handled by a library instead of written by hand
- Projects that only need to use parts of the library, such as the downloader or the cache, separately
Choose SDWebImage if you need…
- iOS or macOS app developers who need to show remote images in lists or grids
- Teams that want caching, progressive loading and image transformations handled by a tested library
- Developers building SwiftUI apps who want to use the separate SDWebImageSwiftUI module built on this core
Side-by-side
| Kingfisher | SDWebImage | |
|---|---|---|
| Type | Library | Library |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 24.4k | 25.6k |
| Setup difficulty | Beginner | Intermediate |
| How you get it | Install with a package manager | Install with a package manager |
| Main language | Swift | Objective-C |
| Last code update | 4 days ago | 7 months ago |
What each one is
Kingfisher
Kingfisher is a Swift library for loading images from URLs into iOS, macOS, tvOS, watchOS and visionOS apps. It downloads an image, keeps it in memory and on disk, and reuses the cached copy the next time the same URL is requested. It also offers image processors such as downsampling and rounded corners, and works with both UIKit/AppKit views and SwiftUI.
SDWebImage
SDWebImage is an Objective-C library for Apple platforms that downloads images from URLs asynchronously and keeps them in memory and on disk so they do not need to be fetched again. It adds helper methods to UI elements such as UIImageView, UIButton and MKAnnotationView so app developers can show a web image with a single call. It also supports animated images like GIF and APNG, and can be extended with plugins for other formats.
Best for
Kingfisher
- iOS or macOS developers who need to show remote images in lists or detail screens
- Teams building SwiftUI apps that display images from URLs
- Developers who want caching and resizing handled by a library instead of written by hand
- Projects that only need to use parts of the library, such as the downloader or the cache, separately
SDWebImage
- iOS or macOS app developers who need to show remote images in lists or grids
- Teams that want caching, progressive loading and image transformations handled by a tested library
- Developers building SwiftUI apps who want to use the separate SDWebImageSwiftUI module built on this core
Strengths
Kingfisher
- Caches images in both memory and disk, so repeated loads of the same URL are fast
- Supports UIKit, AppKit, and SwiftUI, with examples for each in the README
- Components such as the downloader, cache, and processors can be used independently
SDWebImage
- Widely used, with about 25,600 GitHub stars and an active push date in April 2026
- Covers downloading, memory and disk caching, and background decoding in one package
- Modular design with separate plugins for extra formats and SwiftUI
Not ideal for
Kingfisher
- Non-Swift projects, since the library is written in pure Swift for Apple platforms (reason: it does not run on Android or the web)
- Apps with unusual caching rules that go beyond the expiration and size controls described in the README (reason: those controls may not cover every case)
- Developers on Swift versions older than the ones listed for their chosen Kingfisher release (reason: requirements differ by major version)
SDWebImage
- Developers working only with Android, web browsers or other non-Apple platforms, since the library targets Apple platforms
- Beginners with no Xcode or Apple-platform experience, since integration assumes familiarity with app development
- Projects needing modern animated formats such as animated WebP or HEIC by default, since the README says these must be registered manually
Trade-offs
Kingfisher
- Only works on Apple platforms and requires Xcode and Swift
- Minimum OS versions and Swift versions depend on the release, so older projects may need to pin an older major version
- The README is truncated, so details on advanced configuration are only available in the linked external documentation
SDWebImage
- Only for Apple platforms; the README does not cover other ecosystems
- Many advanced features are documented in an external wiki, so the README alone gives limited detail
- Some formats such as animated WebP need manual registration, and visionOS support is described as beta for some versions
Getting started
Kingfisher
Add via Swift Package Manager in Xcode
File > Swift Packages > Add Package DependencyRepository URL to add
https://github.com/onevcat/Kingfisher.gitSDWebImage
Clone the repository
git clone https://github.com/SDWebImage/SDWebImageFrequently asked questions
What is the difference between Kingfisher and SDWebImage?
Kingfisher: A Swift library that downloads, caches, and displays images from the web in apps. SDWebImage: Loads, caches and displays web images on Apple platforms, with a UIImageView-style API. Kingfisher suits ios or macos developers who need to show remote images in lists or detail screens, while SDWebImage suits ios or macos app developers who need to show remote images in lists or grids.
Are Kingfisher and SDWebImage free?
Kingfisher: Free and open source. SDWebImage: Free and open source.
Which is easier to set up, Kingfisher or SDWebImage?
Kingfisher is easier to get started with (rated beginner); SDWebImage is rated intermediate and usually needs more setup.
Is Kingfisher or SDWebImage more popular?
SDWebImage has more GitHub stars (25.6k) than Kingfisher (24.4k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to Kingfisher and SDWebImage?
Other options people compare them with include List.js, SVProgressHUD, FSCalendar.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.