Convert FLV to MP4 for websites, phones and social media. Free, fast and private: the conversion happens in your browser.
Drop video files here
or paste them, or click to choose — several files at once
Choose videosMP4, MOV, WebM, MKV, AVI, WMV, FLV, 3GP, MPEG, GIF and more · up to 1 GB per file
The video engine (about 30 MB) is downloaded once and then cached. Your videos never leave your device; long or HD videos can take a few minutes.
Drop the FLV video onto the page, paste it, or click to choose. It is read directly from your device.
Everything is set up for MP4. Adjust the size or other options if you like — the defaults suit most videos.
The conversion runs in your browser. When it is finished, save the MP4 file to your device.
Flash Video
The old Flash video format
FLV was the video format of Adobe Flash and early YouTube. Since Flash was discontinued, almost nothing plays it any more.
MPEG-4 Part 14
The universal video format
MP4 is the most widely used video format, usually with H.264 video and AAC audio. Phones, cameras, websites and social networks all use it.
Family clips, screen recordings and work videos never leave your device. There is no server copy to leak or delete.
No account, no watermark, no daily limits and no waiting queue. Only your device's memory sets the limit.
When the streams already fit the target format they are copied without re-encoding: done in seconds with zero quality loss.
Add your FLV file to the tool above. MP4 is already selected, so processing starts with the right settings. When it is done, click Download.
If the FLV file already contains compatible streams they are copied without any loss. Otherwise the video is re-encoded at high quality, and the difference is very hard to see.
No. The FLV to MP4 conversion runs entirely in your browser using ffmpeg compiled to WebAssembly. Your video never leaves your device.
If the streams can be copied, a few seconds. If the video has to be re-encoded, roughly one to three minutes per minute of 720p video on a computer, and longer on phones.