How to convert FLV to MP4
Follow these steps to convert FLV to MP4:
- Add one or more FLV files — drag and drop them or click to browse.
- Click Convert to MP4 and let the conversion run in your browser.
- Download your new MP4 files individually or as a batch.
What is FLV?
FLV was the format behind Flash video on the early web. With Flash now discontinued, FLV files are essentially legacy and are converted to MP4 to remain playable on modern devices and browsers.
What is MP4?
MP4 is the most widely compatible video format in the world. Using efficient H.264 compression, it balances small file sizes with good quality and plays on virtually every device, browser and platform — making it the safe default for sharing video.
FLV vs MP4: how they compare
Before converting, it helps to know how FLV and MP4 stack up. The table below breaks it down.
| FLV | MP4 | |
|---|---|---|
| Format type | Video | Video |
| Compression | Lossy | Lossy (H.264/H.265) |
| Quality | Lossy | Lossy |
| Best for | Recovering old Flash video | Sharing video anywhere |
Why convert FLV to MP4?
The usual reason to turn FLV into MP4 is compatibility: MP4 is the right fit for sharing video anywhere and web and social media.
What MP4 gives you: plays on virtually every device, good quality-to-size ratio and universal browser support.
Where FLV falls short: obsolete — Flash is discontinued, not playable in modern browsers and needs conversion to use. Converting keeps your content while moving to a format that matches where the file is going.
Tips for the best results
- You can convert several files in one go — add as many FLV files as you like and download them together.
- Everything runs locally in your browser, so even large files convert quickly and nothing is uploaded.
FLV to MP4 — frequently asked questions
- How do I convert FLV to MP4?
- Add your FLV file, click Convert to MP4, and download the MP4 result. The whole process happens in your browser and takes just a few seconds.
- Is it free to convert FLV to MP4?
- Yes. This FLV to MP4 converter is completely free with no sign-up, no watermarks and no limit on the number of files you can convert.
- Are my FLV files uploaded to a server?
- No. Conversion runs entirely on your device using your browser, so your files never leave your computer or phone.
- Will I lose quality converting FLV to MP4?
- MP4 uses lossy compression, so a small amount of detail is discarded to keep the file size down. At normal quality settings the difference is hard to notice. Keep your original FLV if you need an exact copy.
- Can I convert multiple FLV files at once?
- Yes. Add as many FLV files as you like and convert them in a single batch, then download each MP4 result.