SWF to M2TS Converter
FileFlip converts SWF to M2TS entirely inside your browser, using FFmpeg compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert an SWF file to M2TS?#
- Drop your SWF file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to M2TS and the conversion starts on its own. FileFlip downloads 30.8 MB of WebAssembly the first time and nothing after that, then runs FFmpeg on your own machine.
- Save the M2TS file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting SWF to M2TS lose quality?#
It depends on what is inside the file. SWF is a container rather than a codec, so whether the M2TS conversion copies the streams across untouched or re-encodes them is decided by the codecs that particular file happens to use.
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 SWF to M2TS actually does to the file#
Converting SWF to M2TS runs on FFmpeg, downloads 30.8 MB of WebAssembly the first time and nothing after that, re-encodes or copies through depending on the codecs in the file, and drops encoded streams.
| Engine | FFmpeg |
|---|---|
| Conversion path | One step: SWF → M2TS |
| Downloaded to your browser | 30.8 MB, once, then cached by your browser |
| Quality | Decided by the codecs inside the file |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
What survives the conversion
| What is in the file | This conversion | Why |
|---|---|---|
| Encoded streams | Dropped | The target format has nowhere to put it. |
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.
What is an M2TS file?#
An M2TS file holds a BDAV MPEG-2 transport stream, the timestamped variant of MPEG-TS that Blu-ray Disc authoring software writes into a disc's BDMV/STREAM folder.
Keep footage as M2TS while it's still part of a Blu-ray authoring or playback pipeline that expects that exact stream structure.
Convert M2TS to MP4 or MKV once the goal is normal playback or editing outside of Blu-ray software, since both drop the disc-specific overhead while keeping the same video and audio.
SWF to M2TS 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.
What produces an M2TS file?
M2TS files come from Blu-ray Disc authoring software, from ripping or ejecting a Blu-ray's BDMV/STREAM folder, and from professional camcorders that record straight to the Blu-ray-compatible format. Any tool built around the Blu-ray Disc Association's BDAV structure writes this extension.