Convert mp4 to flv

Converted on your device. Files never leave this tab. Output tops out around 2 GB.

Drop mp4 files here or click to choose

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Nothing is uploaded

The converter runs inside this page. Cut your network after it loads and it still works.

No account, no daily limit

No sign-up, no daily limit, no watermark, no queue behind other people's files. Batch as many MP4 files as you like.

Real FLV output

Encoded by ffmpeg, the same library the command-line tools use — not a renamed extension.

Other mp4 conversions webm mov avi mkv wmv mp3 wav ogg flac m4a aac opus

Convert to flv from webm mov avi mkv wmv

About MP4

MPEG-4 Part 14

An ISO container standard (ISO/IEC 14496-14) based on Apple's QuickTime format. It usually holds H.264 or H.265 video with AAC audio. Use it when a video has to play on any phone, browser, TV or editing app.

About FLV

Flash Video

Adobe's container for Flash Player, which carried most web video in the late 2000s, usually with Sorenson Spark, VP6 or H.264 video. Flash Player was discontinued at the end of 2020. Convert FLV to MP4 to play saved Flash-era video now that Flash is gone.