MP4 to FLV
Convert MP4 videos to Flash Video format for legacy web applications
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
How to convert MP4 to FLV
Follow these steps to convert MP4 to FLV online.
Upload your MP4 file.
We convert your file and prepare the FLV output.
Download the new FLV file when the conversion completes.
Related Tools
About MP4 to FLV conversions
MP4 to FLV lets you convert MP4 to FLV directly in your browser. Files are processed locally so your data stays on your device.
Use this tool when you need FLV files for compatibility, sharing, or smaller sizes. It works on modern desktop and mobile browsers without installing software.
For best results, start with clean source files. Larger files take longer to process, especially for video or audio conversions.
Why use this tool
-
Runs in the browser with no uploads required.
-
Keeps your original file untouched.
-
Works on desktop and mobile devices.
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?
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
Browse All Tools
Browse by category instead of one giant mixed list.
Convert Tools
Convert image, audio, video, document, and data files directly in your browser.