FLV to MP4 Converter
Drop in an FLV and get back an MP4 that plays without a plugin from 2009. Converted in your browser, on your machine, nothing uploaded.
Drop your FLV here
Flash-era saves and captures. Newer ones convert instantly.
Converts on your device. Your file never leaves this page.
- Flash video, post-Flash playback
- Newer FLVs repackage instantly
- No upload, converts on-device
- Free, no sign-up, no watermark
A converter that stays out of your way.
There’s no upload bar and no sign-up wall. You get your file back as an MP4, and that’s the whole transaction.
FLV in, MP4 out
Drop in a FLV file and get back an MP4 that plays on phones, TVs, editors, and upload forms alike. Same name, same footage.
Fast when the file allows it
When the video inside is already MP4-friendly, it gets repackaged in seconds with zero quality loss. Only files with older codecs need a real re-encode.
Your video stays on your machine
Most online converters upload your footage to their server. This one doesn't. The work happens inside this browser tab, and closing the tab clears everything.
Sound handled too
The audio track comes along automatically, converted only if the format demands it. Videos without sound convert just the same.
Video that outlived its player
FLV was how the web watched video for a decade: every embedded player of the 2000s, every early streaming site, every “video downloader” browser toolbar produced Flash Video files. Then Flash died its long public death, the plugin was removed everywhere in 2020, and the format became an orphan; files that once played in every browser now play mostly in VLC and memories.
Whatever’s in your FLV folder, saved clips, captured streams, downloads from sites that no longer exist, this page moves it into MP4 in your browser, without the files going anywhere. For a lot of these files there is no second copy on some server; the download is the only one left, which makes converting it locally the only respectful option.
Two generations of FLV, two speeds
Flash Video had a mid-life codec upgrade, and it decides how your conversion goes. Files from roughly 2008 onward often carry ordinary H.264 inside the Flash wrapper; those repackage into MP4 in seconds, quality untouched. Older files use Flash’s own codecs, which nothing else ever adopted, and get a genuine re-encode. You don’t need to know which you have; the tool probes the file and takes the fast path when it exists.
The last conversion these files need
MP4 is the safest long-term home the format war ever produced: two decades old, universally supported, and going nowhere. Once an FLV becomes an MP4, it plays on phones and TVs, imports into editors, uploads anywhere, and most importantly stops depending on software that no longer exists. Convert the folder once, keep the originals if you’re sentimental, and the Flash era’s homework is finally done.
How to convert FLV to MP4
Three steps, less than a minute. No setup, no sign-up.
Drop in the FLV file
Drag it into the box above, or click Choose a file and pick it from a folder.
Let it work
Most FLV files just get repackaged and finish in seconds. Files that need a real re-encode take longer; the progress bar tells it straight either way.
Save the MP4
Hit Download and the MP4 lands with the same name as the original, ready to play, edit, or upload anywhere.
FLV to MP4 converter FAQ
Because saving video off the 2000s web meant saving FLVs, and downloads outlive the platforms they came from. Browser tools, video site rips, and screen capture software all produced them. The player died in 2020; the files are still in the folder.
Depends on the file's age. Later FLVs carry H.264 video, which repackages into MP4 in seconds without quality loss. Early ones use Flash-only codecs and need a real re-encode. The tool checks automatically and the progress bar makes it obvious which you got.
On the instant path, none. On the re-encode path, marginally, though Flash-era video was compressed hard to begin with; what you see in the FLV is what you'll see in the MP4. Nothing is enhanced, nothing further is lost worth noticing.
Same family, easier case: .f4v was Flash's MP4-based successor to FLV, and those nearly always repackage instantly. Drop them in the same box.
No. The conversion runs inside this browser tab, on your machine, free and without an account. Files saved fifteen years ago can stay as private as they've been all along.
This converts files you already have. Vidferry goes and gets them.
Paste a link from YouTube, Vimeo, or 1,000+ other sites and the Vidferry app saves the video as a clean MP4 directly, whole playlists included, at your machine's full speed. Same privacy, $12 once.
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Paste your first link in under a minute. $12 once, yours to keep, on Mac and PC.