Free · No Upload · Instant

Convert SWF to FLV Free Online — Best SWF to FLV Converter 2025

Convert SWF to FLV online for free. Fast, private Shockwave Flash to Flash Video converter — no upload, no signup. Works in your browser instantly.

Choose Files

or drag and drop files here

Max file size: 2GB

Your files are processed locally in your browser. Nothing is uploaded to any server.

How to Convert SWF to FLV

Upload your SWF file by clicking "Choose Files" or drag and drop it.

Select FLV as the output format.

Click "Convert Now" and download your converted file.

About SWF Format

Extension: .swf
Full name: Shockwave Flash

About FLV Format

Extension: .flv
Full name: Flash Video

Frequently Asked Questions

Is it safe to convert SWF to FLV online?

Yes! Convert999 processes all files directly in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

How long does it take to convert SWF to FLV?

Conversion is nearly instant for most files. Large files may take a few seconds depending on your device's processing power.

Is there a file size limit?

Convert999 supports files up to 2GB. Processing happens locally, so larger files depend on your device's available memory.

Do I need to install any software?

No installation required. Convert999 works entirely in your web browser on any device.

Can I convert SWF to FLV on my phone?

Yes! Convert999 works on any device with a web browser — iPhone, Android, iPad, or desktop. No app installation required. Simply open the converter, upload your SWF file, and download the converted FLV file.

Will I lose quality converting SWF to FLV?

Convert999 uses high-quality conversion algorithms to minimize quality loss. For lossless formats, the conversion is exact. For lossy formats like images and audio, we use optimized settings that balance quality and file size.

Can I batch convert multiple SWF files to FLV?

Yes, Convert999 supports batch conversion. Select or drag & drop multiple SWF files and convert them all to FLV format at once. Each file is processed locally in your browser.

What is the difference between SWF and FLV?

Shockwave Flash (SWF) and Flash Video (FLV) differ in compression, compatibility, and features. SWF is optimized for its native use cases, while FLV may offer different advantages. Visit our SWF vs FLV comparison page for a detailed breakdown.

Why Convert SWF to FLV?

Advantages

✓Flash Video offers better compatibility with modern applications and workflows
✓Converting is completely free with no file size limits on Convert999
✓Your files never leave your device — 100% private and secure conversion
✓Instant conversion without waiting for server processing

Key Differences

→SWF (Shockwave Flash) is optimized for its native use cases
→FLV (Flash Video) may offer different compression or feature set
→Choose based on your target platform, quality needs, and file size requirements

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