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ConvertAnyVideo

MP4 to FLV Converter

Convert MP4 videos to FLV in seconds. Change resolution, quality and frame rate if you like — all in your browser.

or drop files here

Up to 1 GB per file · Files never leave your device

  • 100% free
  • No sign-up
  • No upload — private
  • No watermark

How to convert MP4 to FLV

  1. Add your MP4 files

    Click “Choose Files” or drag and drop your MP4 videos onto this page.

  2. FLV is selected

    The output is already set to FLV. Open Advanced settings if you want to change the quality, resolution or length.

  3. Convert and download

    Click Convert. Your FLV file is ready in moments — nothing is uploaded.

About the formats

MP4

MPEG-4 Part 14

MP4 is the most widely supported video format today. It usually stores H.264 or H.265 video with AAC audio and plays on almost every phone, browser, TV and editing app.

FLV

Flash Video

FLV was the format of Flash video players. It is still used by some streaming tools and old web videos.

Frequently asked questions

How do I convert MP4 to FLV?

Click “Choose Files” and select your MP4 file (or drag it onto the page). FLV is already selected as the output, so just click Convert and download your FLV file when it’s ready.

Will I lose quality converting MP4 to FLV?

When the video inside your MP4 file is compatible with FLV, it is copied without re-encoding, so there is no quality loss at all. Otherwise it is re-encoded at high quality. You can pick the quality yourself in Advanced settings.

Is it safe to convert MP4 files here?

Yes. Conversion runs inside your own web browser, so your files are never uploaded to our servers or anyone else’s. Nobody can see them, and nothing is stored after you close the tab.

Is the MP4 to FLV converter free?

Yes, it’s completely free. There’s no sign-up, no watermark and no limit on how many files you convert. Each file can be up to 1 GB.

Can I convert several MP4 files at once?

Yes. Add as many MP4 files as you like and convert them in one go, then download them one by one or together as a ZIP file.

Convert MP4 to other formats

Convert other formats to FLV