Flash is dead, but your FLV files don’t have to be. Convert Flash-era videos to modern MP4 right in your browser — often with zero quality loss.
Drop your FLV video here or click to browse
Select a FLV video file
FLV (Flash Video) was the format of the early internet video era — old YouTube downloads, Flash games, webinar recordings and screen captures from the 2000s. With Adobe Flash discontinued in 2020, almost nothing plays FLV files anymore. Fortunately, later FLV files typically contain H.264 video and AAC audio — the same codecs MP4 uses — so Fast Copy mode can repackage them losslessly in seconds. Older FLVs with Sorenson Spark or VP6 video need Re-encode mode, which rebuilds them as modern H.264/AAC MP4.
Drop your FLV file — old YouTube downloads and Flash-era recordings welcome.
Pick the conversion options that fit — sensible defaults work for most files.
Get your converted file instantly — it plays on every device and platform.
Yes. Converting to MP4 (H.264 + AAC) makes the video playable on every modern phone, browser, TV and editing app — no Flash Player or VLC workarounds required.
If your FLV contains H.264/AAC (typical for files from ~2008 onward), Fast Copy repackages it with zero quality loss almost instantly. Older FLVs with Sorenson or VP6 codecs are re-encoded at your chosen quality.
Start with Fast Copy — it either finishes in seconds or fails immediately with a codec message. If it fails, switch to Re-encode and convert normally.
No. The conversion runs locally in your browser using FFmpeg WebAssembly. Old personal recordings stay on your device.
Yes — F4V is Adobe’s later Flash container and is already MP4-based, so Fast Copy handles it losslessly in almost all cases.
Completely free, no watermark, no sign-up, no file limit beyond your device’s memory.
Drop an FLV and get a universal MP4 in seconds — right in your browser, no sign-up required.