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FLV to AVI Converter

Convert FLV files to AVI without installing software or uploading anything. If your FLV contains H.264 video, Smart mode copies it into the AVI in seconds; other codecs are re-encoded to MPEG-4 Part 2.

  • Free, no sign-up
  • Files never leave your device
  • Powered by FFmpeg
  • No watermark
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Your files are processed on this device and are never uploaded to a server.

What happens when you convert FLV to AVI

Inside a typical FLVH.264 or Sorenson Spark video with AAC or MP3 audio
Copy without re-encodingSometimes: it depends on the codec inside your file, and Smart mode checks this automatically
When re-encodedMPEG-4 Part 2 video with MP3 audio
Opens inWindows Media Player and VLC; phones and browsers usually do not

Sizes are typical values; your files will vary with content and settings.

FLV

FLV Flash Video

FLV was the Flash Player video format behind early YouTube. Flash is gone, so FLV files now need converting before modern devices will play them.

FLV converter
AVI

AVI Audio Video Interleave

AVI is Microsoft's 1992 video container. It is still found in old camera footage, DVD rips and legacy Windows software.

AVI converter

How to use the FLV to AVI Converter

  1. 1

    Choose a FLV file or drop it onto the page.

  2. 2

    Review the video options. The defaults suit most files.

  3. 3

    Click Convert and download your AVI when processing finishes.

Why convert FLV to AVI?

FLV files are leftovers from the Flash era: old video downloads, game captures and livestream archives. No modern browser or phone plays FLV. Choose AVI for older players, TVs with a USB port and legacy Windows software.

Frequently asked questions

Will the AVI lose quality?

Both formats are lossy, so converting re-encodes the data once more. Using a high quality setting keeps the generational loss very small. Avoid converting the same file back and forth repeatedly.

Does converting FLV to AVI re-encode the video?

Sometimes: it depends on the codec inside your file, and Smart mode checks this automatically. A typical FLV contains H.264 or Sorenson Spark video with AAC or MP3 audio. Otherwise the result is MPEG-4 Part 2 with MP3 audio.

Questions about privacy, file-size limits or conversion speed are answered in the general FAQ.