Convert FLV to MP4 Online Free
Transform your Flash Video (FLV) files into modern MP4 format. No uploads, unlimited conversions, 100% private in your browser.
No file size limits • No watermarks • Completely free
Why Convert FLV to MP4?
FLV is Outdated
Flash Video (FLV) format is obsolete and no longer supported by modern browsers and devices. Adobe Flash Player was discontinued in 2020.
MP4 is Universal
MP4 is the most widely supported video format, compatible with all modern devices, browsers, and media players.
Better Quality
MP4 with H.264 codec offers superior video quality at smaller file sizes compared to FLV.
Mobile Compatible
Play your converted MP4 videos on iPhone, iPad, Android devices, and any modern smartphone or tablet.
How to Convert FLV to MP4
Upload Your FLV File
Click the button above or drag and drop your FLV video file. All processing happens in your browser - your file never leaves your device.
Choose MP4 Format
Select MP4 as your output format and choose your preferred quality (High, Standard, or Low). You can also adjust advanced settings like resolution and bitrate.
Convert & Download
Click "Convert" and wait for the process to complete. Download your converted MP4 file instantly - no watermarks, no signup required.
Features
100% Private
All conversion happens locally in your browser using WebAssembly
Fast Conversion
No uploads or downloads from servers - direct in-browser processing
Completely Free
No limits, no watermarks, no hidden costs - always free
Common Questions
What is FLV format?
FLV (Flash Video) is a container format used by Adobe Flash Player. It was popular for online video streaming in the 2000s but is now obsolete since Flash Player was discontinued in December 2020.
Will converting FLV to MP4 reduce quality?
Quality depends on your settings. If you choose "High Quality" and keep the original resolution, quality loss will be minimal. MP4 with H.264 codec actually provides better compression than FLV, so you can maintain quality with smaller file sizes.
Is my FLV file safe during conversion?
Yes! Your FLV file never leaves your device. All conversion happens directly in your browser using WebAssembly technology. We don't upload, store, or process any files on our servers.
Can I convert multiple FLV files at once?
Yes! Our converter supports batch conversion. Simply upload multiple FLV files and they'll be converted to MP4 sequentially. You can download them individually or as a ZIP archive.
Ready to Convert Your FLV Files?
Start converting now - no signup, no limits, completely free.
Convert FLV to MP4 Now