Video Conversion
Convert MP4 to SWF Online — Free
Fast, free MP4 to SWF converter. No registration required.
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200万以上のファイル変換
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処理後にファイルを自動削除
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すぐに変換を開始
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変換方法
1
Upload your .mp4 file by dragging it into the upload area or clicking to browse.
2
Choose your output settings. The default settings work great for most files.
3
Click Convert and download your .swf file when it's ready.
MP4とは？
MP4 is the most widely used video container format. It stores video, audio, subtitles, and metadata. Compatible with virtually every device and platform, from smartphones to smart TVs.
形式の詳細
- 正式名称
- MPEG-4 Part 14
- 拡張子
- .mp4
主な特徴
- Universal compatibility
- Streaming support
- Small file sizes
- Hardware-accelerated playback
SWFとは？
SWF is a file format for Flash multimedia. While Flash is deprecated, many legacy animations and videos still use this format.
形式の詳細
- 正式名称
- Shockwave Flash
- 拡張子
- .swf
主な特徴
- Flash format
- Vector graphics
- Interactive content
- Legacy format
MP4とSWFの比較
| 特徴 | MP4 | SWF |
|---|---|---|
| 正式名称 | MPEG-4 Part 14 | Shockwave Flash |
| 拡張子 | .mp4 | .swf |
| 最適な用途 | Universal compatibility | Flash format |
よくある質問
Our converter preserves resolution, frame rate, and audio tracks by default. The SWF output uses optimized codec settings to maintain quality as close to the original MP4 as possible.
Free users can convert videos up to 100MB. Pro users can convert files up to 2GB with server-side processing — no software installation needed.
Most videos convert in under 60 seconds. Longer or higher-resolution files may take 1-3 minutes. Processing runs on our servers, so your device stays fast.
Yes. Our video converter is browser-based — works on iPhone, Android, tablet, and desktop. No app download required.
Yes. Audio is preserved by default during video conversion. You can also adjust audio codec, bitrate, and volume in the advanced settings.