Convert any video file to FLV format online for free. Fast, secure, and easy-to-use video to FLV converter with no software installation required.
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Max file size: 50 MBMax duration: 30 min
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Drag and drop your AVI file, or click to browse for it.
Choose FLV as the output and click Convert. The conversion runs on our servers, so your device does none of the work.
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Your file is used only to make your conversion. It is never published or shared, and the download link expires after one hour.
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How the two formats differ on the things that change your result.
| Specification | AVI (source) | FLV (result) |
|---|---|---|
| Container | RIFF AVI | Flash Video |
| Developed by | Microsoft | Adobe (Macromedia) |
| Introduced | 1992 | 2002 |
| Video codecs | MPEG-4 Part 2, DivX, Xvid | H.264, Sorenson Spark, VP6 |
| Audio codecs | MP3, PCM, AC-3 | AAC, MP3 |
| Max resolution | Full HD (1080p) | Full HD (1080p) |
| Typical bitrate (1080p) | 2–12 Mbps | 1–8 Mbps |
| Multiple audio tracks | Yes | No |
| Subtitle tracks | Not supported | Not supported |
| Chapter markers | No | No |
| Streaming optimized | No | Yes |
| Licensing | Patents expired | Proprietary |
| Plays natively on | Native: Windows · Needs a player: macOS, iOS, Android, Smart TVs | Needs a player: Windows, macOS |
| Best for | legacy archives, Windows media libraries | legacy archives, web archives |
The video stream has to be fully re-encoded: AVI typically carries MPEG-4 Part 2, and FLV expects H.264. That means a real transcode, so allow for processing time and a small generational quality cost.
Only one audio track will be kept. AVI can hold several, for example alternate languages, but FLV supports a single track.
FLV is built for streaming and progressive download, so the result starts playing before it has fully loaded, which the source format does not do well.
At 1080p, AVI typically runs around 7 Mbps while FLV sits near 4.5 Mbps, which is the main driver of the size difference you will see.
This is an older container, introduced in 2002, and browsers will not play it directly. It is best suited to archival or a dedicated player.
This page converts AVI video, stored in the RIFF AVI container since 1992, into FLV, which uses Flash Video and dates from 2002. The codecs each container accepts decide whether the picture has to be re-encoded.
AVI comes from Microsoft and dates to 1992. It usually holds MPEG-4 Part 2, DivX, or Xvid video with MP3, PCM, or AC-3 sound, and those streams set the ceiling for anything converted out of it.
FLV comes from Adobe (Macromedia) and dates to 2002. It holds H.264, Sorenson Spark, or VP6 video alongside AAC or MP3 audio, and every major platform needs a media player such as VLC to open it.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
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