Convert FLV to MP4

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Converting FLV to MP4 is free: drop your FLV above, hit convert, and download the MP4. Files delete themselves within an hour.

Most FLV to MP4 conversions are wrapper swaps: the pictures stay pictures, they just trade FLV's box for one built for playing everywhere: browsers, phones, TVs, editors, slide decks. If the codec inside your FLV is one MP4 accepts, Flippy keeps quality bit-for-bit identical; if not, it re-encodes once, carefully, at matching quality.

Why flip FLV to MP4

FLV is a relic of the Flash era: the format YouTube grew up on, stranded when Flash died. It was born in 2002, Macromedia (later Adobe), for Flash Player, and its real weak spot is playing anywhere at all since Flash was switched off in 2020.

MP4 is the world's default video: the file that plays before anyone has to think about it. A container, most often carrying H.264 or H.265 video with AAC audio. That makes it the right destination when what you need is playing everywhere: browsers, phones, TVs, editors, slide decks.

How to convert FLV to MP4

1
Drop your FLV file into the flipper above, or click to browse for it.
2
Check the output format: MP4 is already selected for you.
3
Hit Convert, give it a moment, then download your new MP4.

FLV vs MP4, side by side

	FLV	MP4
Born	2002, Macromedia (later Adobe), for Flash Player	2001, the MPEG standards group, built on Apple's QuickTime design
Type	video · container	video · container
Best for	nothing new: today it's mostly old downloads waiting to be rescued	playing everywhere: browsers, phones, TVs, editors, slide decks
Weak spot	playing anywhere at all since Flash was switched off in 2020	very little day to day: as a container its quality depends on the codec inside
Typical size	small files with dial-up-era expectations about quality	roughly 50–100 MB per minute at 1080p, depending on bitrate
Plays on	Almost nothing modern; VLC and converters are its retirement home.	Every browser, phone, TV and editing app worth mentioning.

Questions people ask

Will converting FLV to MP4 lose quality?

Usually not: when the video codec is compatible, Flippy swaps the container without re-encoding, so quality is untouched. If a re-encode is needed, it happens once at matching quality.

Will the MP4 file be bigger or smaller than my FLV?

Similar, unless a re-encode is involved: then it depends on the codec. MP4 typically runs roughly 50–100 MB per minute at 1080p, depending on bitrate.

Where will the MP4 file play?

Every browser, phone, TV and editing app worth mentioning. That's the usual reason people leave FLV behind: MP4 simply opens in more of the places that matter.

How long does FLV to MP4 conversion take?

When it's a pure container swap it's nearly instant, since nothing is re-encoded. Full re-encodes take roughly as long as the video plays, often less.

More ways to handle these formats

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