FLV to MP4 Converter
Convert FLV files to MP4 format in seconds with optimal quality and zero data retention.
拖放文件到此处或点击浏览
支持 JPG、PNG、WebP、MP4、MOV、MP3、PDF 等50多种格式，最大支持1GB
Format Comparison
FLV vs MP4
Technical differences, compression algorithms, and core trade-offs between FLV and MP4.
| Specification | FLV | MP4 |
|---|---|---|
| Full Name | FLV Flash Video | MP4 Video |
| Compression Type | Lossy | Lossy |
| Transparency Support | No | No |
| Developer | Macromedia / Adobe Systems | ISO / IEC Moving Picture Experts Group |
| Year Introduced | 2003 | 2001 |
FLV Key Advantages
- ✓Low-latency RTMP live streaming support
- ✓Simple packet format
MP4 Key Advantages
- ✓Universal playback across all smartphones, TVs, browsers, and operating systems
- ✓Excellent compression with H.264, H.265 (HEVC), and AV1
- ✓Streaming friendly (faststart)
How It Works
How to Convert FLV to MP4
Three straightforward steps to convert your file.
1. Select your FLV files
Drag and drop your FLV files into the upload box or click to select from your device.
2. Adjust settings (Optional)
Fine-tune optional parameters such as resolution, compression quality, or audio bitrate.
3. Download your MP4
Click "Convert Now" to process your files and instantly download the resulting MP4 files.
Why Choose HyperHelix Convert
Why Choose HyperHelix Convert
Engineered for speed, uncompromised quality, and complete privacy.
Lightning-Fast Speed
High-speed conversions powered by dedicated multi-threaded processing servers.
Pristine Output Quality
State-of-the-art engines (Sharp, FFmpeg) preserve visual clarity and sound fidelity.
Batch Processing
Upload up to 30 files in parallel and download all results in a single ZIP archive.
100% Private & Secure
Encrypted via 256-bit SSL and permanently deleted from our servers after 2 hours.
Granular Controls
Fine-tune resolution, CRF, bitrate, sample rates, channels, and crop/trim bounds.
Works on All Devices
Zero installation required. Runs seamlessly in Safari, Chrome, Edge, and mobile browsers.
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Frequently Asked Questions
Frequently Asked Questions about FLV to MP4
Clear answers to common questions about file conversions, options, and privacy.