Free online MOV to SWF converter

What MOV and SWF are

MOV is Apple’s QuickTime multimedia container. iPhone cameras, QuickTime, macOS workflows, video editors, and older Apple software commonly produce it. A MOV file can contain video, audio, subtitles, or timecode, but the .mov extension does not identify the codecs inside it; common examples include H.264, HEVC, and ProRes. The source codec, frame rate, dimensions, and audio format affect the conversion result.

SWF, originally associated with Shockwave Flash and later called Small Web Format, is an Adobe Flash file format for vector graphics, timelines, ActionScript, animation, and interactive content. A SWF can also contain or reference Flash-compatible video and audio. Its historical advantages were compact vector graphics, timeline-based animation, and delivery of interactive content in a single web-oriented file. It is not a modern replacement for MP4 or WebM.

When conversion is appropriate

MOV-to-SWF conversion is appropriate when a legacy Flash player, archived Flash presentation, or older Flash application specifically expects SWF. It does not convert a MOV into a current browser format. Flash Player support ended on December 31, 2020, and major browsers removed Flash support, so a new website should use MP4 with H.264 video or WebM instead.

How to convert the file

1. Check that the MOV plays correctly and identify its duration, dimensions, frame rate, and audio tracks. Repair or transcode a damaged source before creating SWF.
2. Open 101convert.com, choose MOV as the input format and SWF as the output format, then upload the file. The built-in converter can be used free without installing software.
3. Start the conversion and wait for processing to finish. If output settings are available, use the dimensions and frame rate required by the target Flash project; lower values reduce file size but reduce motion detail.
4. Download the resulting .swf file and test it in the specific legacy Flash environment that will use it. A current browser will not provide a valid playback test.

Local conversion with FFmpeg

For batch processing or files that cannot be uploaded, a local FFmpeg build with an SWF muxer can create a basic SWF containing Flash-compatible video and MP3 audio:

ffmpeg -i input.mov -c:v flv -c:a mp3 output.swf

Support depends on the installed FFmpeg build. Run ffmpeg -muxers and verify that an SWF muxer is listed; run ffmpeg -encoders to check the requested video and audio encoders. Some builds require a different compatible video codec or omit SWF output entirely.

Quality and compatibility limits

• Transcoding can reduce quality. If the MOV uses H.264, HEVC, or ProRes, creating Flash-compatible video normally decodes and re-encodes it. Use the highest practical output bitrate and avoid repeated conversions.
• SWF does not preserve MOV features automatically. ProRes metadata, multiple audio tracks, subtitles, timecode, transparency, HDR, and editing information may be discarded. MOV is a container, while SWF is an interactive Flash document that may include only a single converted media stream.
• Playback is environment-dependent. SWF output may rely on codecs such as Sorenson Spark, VP6, or Flash-compatible audio formats. A converter can produce a technically valid SWF that the intended old player or application cannot decode.
• Interactivity is not created by conversion. A MOV contains linear audio and video; converting it does not add ActionScript, clickable controls, vector graphics, or Flash timeline behavior.
• Security and archival testing are necessary. Legacy Flash runtimes are unsupported and unsafe on untrusted content. Keep the original MOV and, for archival use, record the player version and codec settings required to open the SWF.