# onevcat/Kingfisher

A lightweight, pure-Swift library for downloading and caching images from the web.

Repository: https://github.com/onevcat/Kingfisher
Canonical: https://ross.abutalabs.com/products/kingfisher
Language: Swift
License: MIT
License Family: permissive
Topics: swift, kingfisher, image, cache, filters, image-processor, xcode, ios, macos
Last push: 2026-08-25T15:09:33+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 99, longevity 100
- inputs: {"age_days": 4167, "days_push": 8, "days_rel": 8, "gap_med": 22, "n_releases_24m": 26}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 24395, forks 2766 (observed 2026-08-28T04:11:37.079718+00:00)

## What it is
Kingfisher is a pure-Swift library for asynchronously downloading and caching remote images, with a multi-layer memory and disk cache and built-in image processors. It provides convenient extensions for UIImageView, UIButton, SwiftUI views, and more to set images from URLs with transitions and placeholders.

## Use cases
- download and cache images from urls in an ios app
- load remote images into uiimageview with placeholder and transition
- cache images to memory and disk with expiration and size limits
- display remote images in swiftui with kfimage
- apply filters and processors to downloaded images
- prefetch images for collection views to improve scroll performance

## When to choose
- you are building an iOS, macOS, or SwiftUI app that displays many remote images
- you need a battle-tested image loading and caching solution with fine cache control
- you want built-in image processing, prefetching, and transition animations

## When to avoid
- you are not developing in Swift or on Apple platforms
- you only need a plain HTTP client without image-specific caching
- you need image loading for Android or web frontends

## Facets
- artifact type: library
- maturity: stable
- function: caching, image-processing, http-client
- domain: mobile-development, frontend, media
- platform: cross-platform
- tags: swift, image-downloading, swiftui, uikit, memory-cache, disk-cache, ios, macos

## Member repositories
- onevcat/Kingfisher (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:37.079718+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:56:14.223471+00:00, confidence not recorded.
  - readme: https://github.com/onevcat/Kingfisher (fetched 2026-08-28T04:11:37.079718+00:00, sha b116222e170a)
- Data as of 2026-08-30T08:39:29.467469+00:00.