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The SWF needs a video stream. A shape animation or game is not turned into a movie. Conversion stays in this browser.

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Convert a Flash SWF video to MP4

Convert a Flash SWF video to MP4 in your browser. No signup, the picture is H.264, and the file stays on your device.

What is an SWF to MP4 converter?

SWF is the old Flash file format. This page writes an MP4 from an SWF that already contains a video stream. Shape animations and games are left as they are.

SWF to MP4 converter features

Save a Flash video as an MP4 file.

  • SWF to MP4

    Upload an .swf file that contains a video and download an .mp4 file.

  • H.264 video

    The picture is written as H.264. Audio is written as AAC when the SWF has an audio stream.

  • Video stream required

    A drawing or game with no video stream is rejected.

  • Browser-side conversion

    The file stays on your device. No account is required.

How to convert SWF to MP4

Three steps from a Flash video to MP4.

  1. Add the SWF

    Drop an .swf file that already contains a video.

  2. Convert to MP4

    Click Convert to MP4. The video is written as H.264.

  3. Download the MP4

    Save the .mp4 file.

Tips for converting SWF to MP4

Which SWF files this converter can read.
  • 01

    Use a video SWF

    The file needs a video stream, such as a Flash video recording.

  • 02

    Animations stay drawings

    Vector cartoons and games are not played back and recorded.

  • 03

    Odd frame sizes are evened

    Width and height are rounded down to even pixels so the MP4 can play.

Good uses for SWF to MP4

When a Flash file already holds a video.

  1. Open an old Flash video: Turn that SWF into an MP4 a normal player can open.

  2. Keep the soundtrack: Audio stored with the video is written as AAC.

  3. Stay local: The conversion runs in the browser.

Why convert SWF to MP4 here

A local conversion from a Flash video to MP4.

  • No signup

    Convert an SWF without an account.

  • Stays on your device

    Encoding runs in the browser.

  • An .mp4 file

    The download is H.264 video.

Technical details

How this SWF to MP4 conversion works.
Input
An uncompressed or compressed SWF up to 200 MB that contains a video stream.
Output
An H.264 MP4. Audio is AAC at 128 kbps when an audio stream is present.
What is left out
A shape animation or game with no video stream is rejected.
Where it runs
FFmpeg encodes the file in the browser. The SWF is not uploaded for conversion.

Sources & References

A reference for the SWF file this converter reads.
  • “SWF is a defunct Adobe Flash file format that is used for multimedia, vector graphics and ActionScript.”
    — Wikipedia — SWF

    SWF: This tool reads the video stream in that file and writes an MP4. Vector graphics are not rendered. en.wikipedia.org/wiki/SWF

Frequently Asked Questions

Quick answers about this tool—open a question to read more.