Any-Tools.net
Free Converter

FLV to MP4 Converter

Convert FLV video files to MP4 format instantly in your browser. Free, secure, and no upload required.

Drag & Drop FLV here

Supports FLV files. Max 500MB.

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About This Tool

Convert FLV files to MP4 format instantly in your browser. FLV (Flash Video) is best suited for legacy web video (formerly used by YouTube, Flash Player), while MP4 (MPEG-4 Part 14) is ideal for web video, streaming, universal compatibility. All processing runs locally in your browser — your files are never uploaded to any server.

How to Use

  1. Upload your FLV video file by dragging it into the drop zone.
  2. The conversion runs locally using FFmpeg WebAssembly — no server upload required.
  3. Wait for processing to finish (larger videos may take longer).
  4. Click Download to save your MP4 video file.

Frequently Asked Questions

Does converting FLV to MP4 change the content?
The content is preserved as accurately as possible. However, some format-specific features may not have direct equivalents, so minor formatting differences can occur.
Why convert to MP4 format?
MP4 is the most universally supported video format. It plays on virtually every device, browser, and media player. With H.264 encoding, it provides excellent video quality at reasonable file sizes.
How long does video conversion take?
Conversion time depends on the video length, resolution, and your device's processing power. A typical 1-minute clip takes 10-30 seconds. The entire process runs in your browser using FFmpeg WebAssembly.
Are my video files uploaded to a server?
No. Video processing uses FFmpeg compiled to WebAssembly, running entirely in your browser. Your video files remain on your device at all times — nothing is sent to any external server.

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