MP4 to FLV
or drop files here
MP4 Format
MPEG-4 Part 14
Modern video container with excellent compression and wide compatibility
- H.264/H.265 video support
- Universal browser support
- Excellent compression
- HTML5 compatible
- Streaming optimized
FLV Format
Flash Video
Legacy video format designed for Adobe Flash Player
- Flash Player required
- VP6/H.264 video codecs
- Legacy web streaming
- Larger file sizes
- Obsolete for modern web
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Frequently Asked Questions
Everything you need to know about our converter
What is FLV format used for?
Why convert MP4 to FLV?
Can modern browsers play FLV files?
How does FLV compare to MP4 for file size?
Is FLV still relevant in 2025?
Is the conversion process secure?
Related Articles & Guides
Learn more about file conversion and best practices
Flash Video: Legacy Format Guide for 2025
Legacy Media
Understanding FLV format, its historical importance in web video, and when you might still need Flash Video in modern workflows.
Converting Modern Videos for Flash Applications
Legacy Compatibility
Technical guide to preparing modern MP4 videos for legacy Flash-based systems and maintaining compatibility with older infrastructure.
From Flash to HTML5: Video Format Migration
Web Evolution
Complete guide to migrating from Flash Video (FLV) to modern HTML5 video formats, covering technical and implementation considerations.
Changelog
Track the latest updates, improvements, and fixes to our tools
Launched MP4 to FLV converter
Added legacy format support
Implemented Flash video compatibility features
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