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ConvertAnyVideo

FLV to MP4 Converter

Convert FLV videos to MP4 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 FLV to MP4

  1. Add your FLV files

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

  2. MP4 is selected

    The output is already set to MP4. Open Advanced settings if you want to change the quality, resolution or length.

  3. Convert and download

    Click Convert. Your MP4 file is ready in moments — nothing is uploaded.

About the formats

FLV

Flash Video

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

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.

Frequently asked questions

How do I convert FLV to MP4?

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

Will I lose quality converting FLV to MP4?

When the video inside your FLV file is compatible with MP4, 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 FLV 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 FLV to MP4 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 FLV files at once?

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

Convert FLV to other formats

Convert other formats to MP4