Convert FLV to MP4
Convert FLV video files to MP4 format quickly and securely in your browser. Ensure universal compatibility across all devices and browsers. Enable advanced features like multiple audio tracks and subtitles. Modernize legacy Flash videos for current web standards.
Complete Privacy Protection
Your videos are processed entirely in your browser using WebAssembly. No files are uploaded to our servers - everything stays on your device.
Upload FLV Video
Drop your FLV video here or click to browse
Supports video/x-flv • Maximum file size: 1GB
Processing happens entirely in your browser - your videos never leave your device
Why Convert FLV to MP4?
Benefits
- Ensure universal compatibility across all devices and browsers
- Enable advanced features like multiple audio tracks and subtitles
- Modernize legacy Flash videos for current web standards.
Common Use Cases
- Social media sharing and uploads
- Web streaming and embedding
- Mobile device playback
- Universal device compatibility
Video Format Comparison
FLV(Source)
Flash Video format used for web streaming
MP4(Target)
Most popular video format with excellent compatibility across all devices
Frequently Asked Questions
Is it safe to convert FLV to MP4 online?
Absolutely! Our video converter runs entirely in your browser using WebAssembly. Your video files never leave your device - they're processed locally for complete privacy and security.
What's the maximum file size I can convert?
You can convert video files up to 1GB in size. Since processing happens in your browser, larger files may take longer and use more system resources.
Will I lose video quality when converting to MP4?
MP4 uses efficient compression. Our converter offers quality presets to help you balance file size with visual quality. The 'High Quality' setting preserves excellent video quality.
How long does video conversion take?
Conversion time depends on your device's processing power and the video's size/length. The first conversion downloads the video processor (~25MB), but subsequent conversions are much faster. Expect 1-3x the video's duration for processing time.
What video codecs are supported?
Our converter supports modern codecs like H.264, VP9, and AAC audio. This covers the vast majority of video files including MP4, AVI, MOV, WebM, and other popular formats.
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