Convert MP4 to FLV
MP4 is great for sharing video anywhere — phones, social media, web and TVs, but FLV is the better choice for old web video archives. Convert MP4 to FLV in seconds, right in your browser.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert MP4 to FLV
- 1
Tap Choose files and select one or more MP4 files (or drag them in).
- 2
Check that FLV is selected. Use Advanced options for resolution, size or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your FLV downloads automatically. Converting several files? Grab them all as a ZIP.
MP4 vs FLV
Both formats are lossy, so the video is re-encoded once. Pick High quality to keep it as close to the original as possible, or Small for the smallest file.
| MP4 | FLV | |
|---|---|---|
| Full name | MPEG-4 Part 14 | Flash Video |
| Type | Video | Video |
| Compression | Lossy | Lossy |
| Developed by | MPEG | Adobe |
| Introduced | 2001 | 2002 |
| Plays on iPhone | ✓ Yes | ✕ No |
| Plays on Android | ✓ Yes | ◐ Partly / with an app |
| Plays on Windows | ✓ Yes | ◐ Partly / with an app |
| Plays on Mac | ✓ Yes | ✕ No |
About MP4 and FLV
MP4: MP4 is the universal video format. With H.264 video and AAC audio it plays on every iPhone, Android phone, smart TV, browser, WhatsApp, Instagram and YouTube.
FLV: FLV is the Flash Video format that powered early YouTube. Flash is gone, so FLV files usually need converting to play today.
Frequently asked questions
How do I convert MP4 to FLV on my phone?
Will converting MP4 to FLV reduce quality?
Is this MP4 to FLV converter free?
Are my files uploaded to a server?
Rate this tool
Be the first to rate it.
Thanks for rating! ❤️