# Ruffle: a Rust reimplementation of Adobe Flash Player > Reimplements Adobe Flash Player in Rust so that SWF content, from ActionScript 1/2 (AVM1) to ActionScript 3 (AVM2), runs in a native desktop player or in browsers through WebAssembly, as a self-hosted script or a browser extension. Its contributor guide says behavior comes from observing Flash Player's output or from license-compatible sources such as Adobe's open avmplus code, and forbids decompiling Flash Player, Flash Professional or Animate. Regression tests run contributor-made SWFs and compare their trace output, and optionally rendered images, with captures from the official debug Flash Player. - Type: Case study - Targets: Game · Website - Category: Independent reconstruction cases - Relationship: Independent reconstruction project - Sources reviewed: 2026-10-19 - Added to the catalog: 2026-10-20 - Original resource: - Primary source: - Catalog page: - Record JSON: - Chinese version: [简体中文](https://awesomerea.org/zh/resources/ruffle-flash-player-case/index.md) ## Requirements & limits - **Prerequisites:** Users supply the SWF files or the pages that embed them. Release assets cover Linux (x86_64, i686 and aarch64), macOS universal and Windows (x86 and x86_64) desktop builds, self-hosted web and browser-extension packages and a reproducible source archive; the README also points to Firefox and Chrome extensions, Flathub, npm and a separate Android project. - **Prerequisites:** Building needs the latest stable Rust (the workspace uses the 2024 edition) and Java on PATH to compile the ActionScript 3 built-in classes; Linux builds need ALSA, udev, fontconfig, FreeType and OpenSSL development packages. Web builds also need the wasm32-unknown-unknown target, Node.js with npm 7+, wasm-bindgen-cli 0.2.127 and Binaryen. Bundled scanner and exporter tools bulk-parse SWFs and render PNG screenshots. - **Scope:** The README says Ruffle supports ActionScript 1, 2 and 3 pretty well but is not finished. At review, the website's compatibility page reported 99% of the AVM1 language and 82% of its API, and 90% of the AVM2 language and 82% of its API, and acknowledged graphical inaccuracies in AVM1 content. Release at review: v0.7.1, published 2026-10-07 and described as equivalent to v0.7.0 apart from extension-publishing fixes; nightly builds continue, and the reviewed master commit is 73 commits ahead. - **Testing evidence:** Contributors are asked to commit each test SWF with its source, and expected trace output and screenshots come from running the debug Flash Player; known failures can be marked in a test's test.toml. These tests check Ruffle's behavior on authored test files. - **License:** Dual-licensed MIT or Apache-2.0 (GitHub reports NOASSERTION); LICENSE.md lists third-party dependency licenses, and the repository includes asc.jar from the Flex SDK to compile its ActionScript classes. SWF content keeps its own rights. ## Primary sources 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. ## More in Websites - [Littlebird.ai static home-page rebuild](https://awesomerea.org/resources/littlebird-static-rebuild-case/index.md) · Case study - [Sheypoor MCP: mapping marketplace APIs from browser traffic](https://awesomerea.org/resources/sheypoor-mcp-case/index.md) · Case study - [ZCode-Android: reconstructing the ZCode remote-control client](https://awesomerea.org/resources/zcode-android-case/index.md) · Case study - [Power BI API Scraper: decoding a published report query format](https://awesomerea.org/resources/power-bi-report-query-case/index.md) · Case study - [webcrack](https://awesomerea.org/resources/webcrack/index.md) · Tool - [humanify](https://awesomerea.org/resources/humanify/index.md) · Tool ## About this entry The description was reviewed against primary sources. Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.