FLV to MP4 - Convert Flash Videos

Convert FLV to MP4 online. Rescue old Flash videos for modern playback on any device. Free, private, browser-based conversion.

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Flash Video files from the 2000s-2010s

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All processing happens in your browser using FFmpeg WebAssembly. Your videos never leave your device—completely private and secure.

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Frequently Asked Questions

FLV (Flash Video) was the dominant web video format from the mid-2000s to early 2010s, powered by Adobe Flash Player. Common sources include old YouTube downloads, videos from Flash-based websites, archived web content, legacy video platforms, and screen recordings from older software versions.

Adobe discontinued Flash Player in December 2020, and all major browsers removed Flash support for security reasons. FLV files can no longer play in web browsers. Only desktop media players like VLC can still play FLV. Converting to MP4 is the modern solution.

Yes! If you downloaded YouTube videos before 2010-2012, they're likely in FLV format. Converting them to MP4 makes them playable on any modern device—phones, tablets, smart TVs, game consoles, and in video editing software.

Some quality loss occurs when transcoding between different codecs. However, many old FLV files used low bitrates and MPEG-4 Part 2 codec, so the conversion to modern H.264 often looks nearly identical. At 'High Quality' settings, differences are minimal.

For most old FLV content, 'High Quality' works perfectly since FLV files were already compressed for web delivery. Use 'Best Quality' only for archiving important footage. 'Smaller File' is fine for casual viewing since source quality was often limited.

FLV was YouTube's primary format until 2010, and Flash Player was installed on nearly every computer. FLV offered good compression for the era and streamed efficiently over slow internet connections. It was perfect for the 2000s web, but technology has moved on.

No, audio is preserved and converted to AAC format, which is the standard audio codec for MP4. Both video and audio tracks are transcoded to the MP4 container, maintaining synchronization and quality.

Yes, older versions of Camtasia, Bandicam, and other screen recorders used FLV. For screen recordings with text, use 'High Quality' or 'Best Quality' to preserve sharpness. The conversion works perfectly for presentations and tutorials.

No. All conversion happens entirely in your browser using FFmpeg WebAssembly. Your video files never leave your device, making this tool completely private and secure. You can even use it offline after the page loads.

This tool processes one file at a time for maximum browser compatibility. For batch conversion of many FLV files, desktop tools like HandBrake or FFmpeg command line are more efficient. For small batches, convert files one by one.

FLV to MP4 - Convert Flash Videos

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