Skip to main content
Convert999
フォーマットすべての変換ツール比較活用事例ToolsBlog
変換ツール
Convert999

400以上の形式をサポートする無料オンラインファイル変換ツール。

製品

  • すべての変換ツール
  • フォーマット
  • 比較
  • 活用事例
  • Tools

リソース

  • 概要
  • Blog
  • Security
  • Glossary
  • Statistics
  • Changelog
  • Contact

法的情報

  • プライバシーポリシー
  • 利用規約

© 2026 Convert999. All rights reserved.

Made with for the web

HomeSWF vs ASF
.swf
.asf

SWF vs ASF

Compare Shockwave Flash and Advanced Systems Format formats — understand the key differences and when to use each

Format Overview

SWF

Shockwave Flash

Shockwave Flash (.swf) is a video file format.

.swfvideo

ASF

Advanced Systems Format

Advanced Systems Format (.asf) is a video file format.

.asfvideo

SWF vs ASF: Feature Comparison

FeatureSWFASF
Full NameShockwave FlashAdvanced Systems Format
File Extension.swf.asf
Categoryvideovideo
Free to Convert✓ Yes✓ Yes
Browser Support✓ All Browsers✓ All Browsers
Convert to Each Other✓ Yes✓ Yes

When to Use SWF vs ASF

Use SWF when you need:

  • •Files in Shockwave Flash format for maximum compatibility
  • •Industry-standard video format support
  • •Wide software and platform compatibility

Use ASF when you need:

  • •Files in Advanced Systems Format format for specific workflows
  • •Optimized video format features
  • •Modern format advantages and smaller file sizes

Convert Between Them

SWF ASFASF SWF
ファイルを選択

またはファイルをここにドラッグ＆ドロップ

最大ファイルサイズ：2GB

ファイルはブラウザ内でローカルに処理されます。サーバーにアップロードされません。

Learn More About These Formats

SWF Converter ASF Converter

Frequently Asked Questions

What is the difference between SWF and ASF?
SWF (Shockwave Flash) and ASF (Advanced Systems Format) are both video file formats. SWF files use the .swf extension while ASF uses .asf. They differ in compression, quality, compatibility, and intended use cases.
Can I convert SWF to ASF for free?
Yes! Convert999 lets you convert SWF to ASF completely free, directly in your browser. No file upload to any server, no registration needed — your files stay private on your device.
Which is better, SWF or ASF?
It depends on your use case. SWF (Shockwave Flash) may be better for certain workflows, while ASF (Advanced Systems Format) excels in others. Consider factors like file size, quality, software compatibility, and your specific needs.
Is it safe to convert files on Convert999?
Absolutely. Convert999 processes all files 100% locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

SWF Converter

Convert from SWF

ASF Converter

Convert from ASF

File Tools

Compress, resize, merge

Convert to SWF

All sources → SWF

Convert to ASF

All sources → ASF

Format Statistics

Trends & data 2025

More Format Comparisons

JPGvsPNGPNGvsWEBPJPGvsWEBPSVGvsPNGHEICvsJPGBMPvsJPGTIFFvsJPGGIFvsPNG