SWF Converter
FileFlip converts SWF files into 31 other formats entirely inside your browser, using FFmpeg and WebCodecs compiled to WebAssembly. The SWF file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. There is no file-size limit and no account to create.
How do I convert an SWF file?#
- Drop your SWF file onto the converter at the top of this page, or click it to pick one from your computer.
- Choose the format you want out of it. FileFlip downloads the engine that conversion needs, once, and your browser caches it.
- Conversion starts the moment you pick the format, and the result is yours to download. The work happens in this tab, so nothing is uploaded and nothing is queued.
Is it safe to convert SWF files online?#
Yes, because nothing is uploaded. FileFlip converts SWF files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What happens to a SWF file#
FileFlip converts SWF into 31 formats with FFmpeg and WebCodecs, all of it inside the browser tab. Each conversion below names the engine it uses, what it downloads, and exactly what that conversion keeps or drops.
| Category | Video Files |
|---|---|
| File extension | .swf |
| FileFlip support | Read only, so it is a source rather than a target |
| Conversions available | 31 |
| Engines | FFmpeg and WebCodecs |
| Downloaded to your browser | 30.8 MB on the first conversion, then cached |
What is an SWF file?#
An SWF file is a Flash movie, a mix of vector graphics, ActionScript code and, from Flash Player 6 onward, embedded audio and video, the format that carried most animation and video on the web before HTML5.
There is no reason to author new content as SWF; it survives only as a format to recover material from.
Convert an SWF's embedded video to MP4 to get a playable file out of it, since Flash Player itself no longer runs anywhere it isn't specifically emulated.
The SWF file format reference covers the specification, the programs that open one, and what each conversion keeps or drops.
SWF questions people ask#
Can I still open an SWF file in 2026?
Yes, through Ruffle, an open-source Flash Player emulator written in Rust that runs as a standalone app on Windows, macOS and Linux, or as a browser extension that plays SWF files Adobe's own player no longer will. It covers the large majority of ActionScript 1.0 and 2.0 content and most of ActionScript 3.0, though not every advanced feature.
When exactly did Flash stop working?
Adobe ended Flash Player support on December 31, 2020, then shipped an update on January 12, 2021 that actively blocks Flash content from playing in it. Any SWF file made before that date needs Ruffle or a similar emulator to run today.
What comes out of converting an SWF to video?
Only whatever video stream was embedded inside the SWF in the first place, added to Flash from Flash Player 6 onward. Vector animation, interactive menus and ActionScript code have no video equivalent, so an SWF built as an animation or a game rather than a video player will yield little or nothing to convert.