FLV to MP4 Converter
Convert FLV (Flash Video) files to MP4 format online. Fast browser-based conversion with no upload required. Free and secure.
How to Convert FLV to MP4
- 1 Upload your FLV video file
- 2 Adjust the video quality setting
- 3 Click Convert to MP4 to start processing
- 4 Wait for the conversion to complete
- 5 Download your MP4 video file
Frequently Asked Questions
How does browser-based video processing work? ▼
MagicKit uses FFmpeg compiled to WebAssembly (WASM). This brings professional video editing capabilities directly to your browser.
What video formats are supported? ▼
MP4, WebM, MOV, and AVI. Some tools also support MKV and other formats.
Is there a file size limit for videos? ▼
We recommend files under 500MB for optimal browser performance. Larger files will work but may be slower.
Why does video processing take time? ▼
Video encoding is computationally intensive. Processing happens on your device, so speed depends on your computer's capabilities.
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Last updated: January 15, 2026 · v2.1