FLV to MP4
Convert FLV to MP4 for free in your browser. Batch conversion, no sign-up, and your files are never uploaded.
Short clips take seconds; long videos can take a few minutes, especially on phones.
🔒 Your files are processed on your device and never uploaded.
Frequently asked questions
How do I convert my files?
Choose or drop your files, adjust the options if you like, then press “Convert” and download the result.
Are my files uploaded to a server?
No. The conversion runs entirely in your browser, so your files never leave your device — safe for private photos and documents.
Is there a file size limit?
There is no fixed limit. Very large files (hundreds of MB) depend on your device's memory and can be slow on phones.
Is it free?
Yes — free and unlimited, with no sign-up and no watermark.
About the formats
FLV
FLV is the Flash Video format once used by YouTube and other websites. Flash has been discontinued, so modern devices need FLV videos converted to MP4.
MP4
MP4 is the most common video format, played by every phone, computer, TV and website. It usually holds H.264 video and AAC audio, a good balance of quality and size.