Convert FLV to MP4
Convert old FLV (Flash) videos into modern MP4, right in your browser. No upload.
How to convert FLV to MP4
Drop your file
Drag it in. It stays on your device.
Pick the format
And the quality.
Download
Your file is ready.
Convert FLV to MP4
FLV (Flash Video) is a legacy format from the Flash era, now abandoned. Most players and browsers no longer open it, leaving your old archives unplayable.
Converting your FLV files to MP4 brings them back to life: MP4 plays on every device and is safe from obsolescence.
Conversion is entirely local (WebAssembly): your videos never leave your device.
FLV vs MP4: what's the difference?
| Criterion | FLV | MP4 |
|---|---|---|
| Status | Flash format — discontinued since 2020 | Current standard |
| Browser playback | No browser plays it anymore | Native, everywhere |
| Mobile and TV | No compatibility | Full |
| Longevity | Your videos become unreadable | Durable format |
Flash died in 2020: an FLV file is now nearly impossible to play without specialized software. Converting to MP4 is really about saving your old videos before you can't open them at all.
When should you convert FLV to MP4?
- Recover old videos downloaded in the Flash era.
- Play them again on a phone, a TV or in a browser.
- Publish them on YouTube or social media.
- Archive your video library in a format that will last.
Frequently asked questions
Why convert FLV to MP4?
Flash is dead: converting FLV to MP4 makes sure your files stay playable in the future, on any device.
Is it free?
Yes, free and no sign-up. An engine (~30 MB) loads once, then everything runs on your device.
Is quality preserved?
Yes, the conversion re-encodes the video to H.264 while preserving the original quality as best as possible.
Are my videos private?
Yes. No video is sent to a server; everything is processed locally.