Convert FLV to MP4
100% private — runs on your device, never uploaded. Works offline once loaded.
FLV was the format of Flash video, and Flash has been gone since 2020 — which leaves a lot of archived lectures, screen recordings and downloaded clips in a container nothing will open. The video inside is usually H.264 already, in which case this rewraps it into MP4 instantly with no loss at all; older FLV files using Sorenson Spark or VP6 have to be re-encoded, which takes longer and costs one generation. Either way the result is an ordinary MP4 that plays on any phone, TV or browser, which is the only practical way to keep that material watchable.
Frequently asked questions
Is my FLV file recoverable if it is very old?
Usually. Older FLV files use Sorenson Spark or VP6 video, which is decoded and re-encoded to H.264 — slower than a rewrap, but the picture is preserved.
Why is MP4 better than FLV?
FLV needed the Flash plugin, which no browser has supported since 2020. MP4 plays natively everywhere.
Is anything uploaded?
No. The file is converted in your browser.
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