Convert Flash FLV video into a modern MP4, on your device.
FLV is the Flash Video format, the container that carried nearly every online video during the era of Flash players. YouTube, streaming sites, and old screen recorders all used it, and a lot of downloaded clips and archived tutorials still sit in .flv files today. The problem is that Flash is gone. Browsers dropped it, phones never really supported it, and modern editors and players routinely refuse FLV. Converting to MP4 pulls that footage out of a discontinued format and into one that will keep working.
To use it, drop an FLV file onto the page or click to pick one, then run the conversion. The tool decodes the Flash video and audio, re-encodes them to H.264 and AAC, and produces a standard MP4 for download. Nothing uploads and no sign-up is required.
Most FLV files already hold H.264 video inside an old Flash wrapper, but some use the older Sorenson or VP6 codecs from Flash's earlier days. The conversion decodes whatever is in there and writes clean H.264 in an MP4 container, so both new and genuinely old Flash clips come out playable. As with any re-encode, the job takes real processing time and any quality change is minor.
Convert whenever you want an FLV to survive. Since almost nothing plays Flash video anymore, that is nearly every situation. There is little reason to keep a file as FLV except as an untouched archive copy, and even then an MP4 alongside it is the safer bet for actually watching it later.
People use this to rescue downloaded Flash-era tutorials and clips, to get old FLV screen recordings into a current editor, to make archived footage playable on phones and modern browsers, and to prepare clips for uploads that only accept MP4. If you have a folder of videos saved back when Flash ruled the web, this is how you keep them watchable.
Everything runs locally in your browser, so your footage is never uploaded and stays private on your device. The one network request is the roughly 32 MB media engine downloaded the first time you use the tool, then cached for later runs so repeat conversions start quickly. The only real limit on file size is your device's own memory, because the whole conversion happens on your hardware and not on a remote server.
No. Flash Player is discontinued and this tool does not use it at all. It carries its own decoder for FLV, so you can convert old Flash videos on a modern browser that has no Flash support whatsoever.
Likely yes. The tool decodes the common Flash codecs including the older Sorenson and VP6 as well as the later H.264, so even early Flash clips generally convert. If a file plays in an old player, it can almost always be re-encoded here.
Whatever plays it today is running on borrowed time, since Flash support has been removed almost everywhere. Converting to MP4 now means the footage stays watchable on future devices and apps long after the last Flash-capable player disappears.
Yes, the tool re-encodes video and audio together and preserves their timing, so lip sync and music stay aligned in the MP4. Badly damaged source files are the rare exception, and those usually have sync problems already.
You convert one file per run so each gets the full memory of your device. For a folder of old clips, run them one after another. Because there is no server queue, each conversion starts the instant the previous one finishes.
Often about the same or a little smaller, since most FLV already uses H.264. The main gain is compatibility rather than size, giving you a file that plays on phones, browsers, and editors that all dropped Flash.
Polished Pixels. All tools. About. Contact. Every tool runs in your browser and your files are never uploaded.