Convert FLV to MP4
FLV is great for old web video archives, but MP4 is the better choice for sharing video anywhere — phones, social media, web and TVs. Convert FLV to MP4 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 FLV to MP4
- 1
Tap Choose files and select one or more FLV files (or drag them in).
- 2
Check that MP4 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 MP4 downloads automatically. Converting several files? Grab them all as a ZIP.
FLV vs MP4
FLV and MP4 can hold the same codecs, so in Smart mode the streams are copied — the conversion takes seconds and quality is identical to the original.
| FLV | MP4 | |
|---|---|---|
| Full name | Flash Video | MPEG-4 Part 14 |
| Type | Video | Video |
| Compression | Lossy | Lossy |
| Developed by | Adobe | MPEG |
| Introduced | 2002 | 2001 |
| Plays on iPhone | ✕ No | ✓ Yes |
| Plays on Android | ◐ Partly / with an app | ✓ Yes |
| Plays on Windows | ◐ Partly / with an app | ✓ Yes |
| Plays on Mac | ✕ No | ✓ Yes |
About FLV and MP4
FLV: FLV is the Flash Video format that powered early YouTube. Flash is gone, so FLV files usually need converting to play today.
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.
Frequently asked questions
How do I convert FLV to MP4 on my phone?
Will converting FLV to MP4 reduce quality?
Is this FLV to MP4 converter free?
Are my files uploaded to a server?
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