Convert AVI to FLV Online Free
AVI is a legacy Microsoft video container still found in older files and cameras. FLV is a legacy Flash video format that is now largely obsolete. FileConverter turns your AVI into FLV online in seconds - free, privacy-first, and with no software to install or account to create.
Convert AVI to FLV
FLV is already selected. Add your AVI file to start.
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Add a AVI file above to start the conversion.
Both AVI and FLV are legacy formats, and this conversion only earns its keep when maintaining an old Flash-based system that ingests FLV. It converts one archival relic into another the target platform can actually read.
What changes when you convert AVI to FLV
This re-encodes your footage from the AVI container into FLV, which can change the underlying codec and file size. At sensible settings quality is well preserved, but converting from a higher-quality AVI source always produces a better FLV result. Trim long clips first if you only need part of the footage.
About the AVI format
AVI is an older container that can hold high-quality, lightly compressed video, which is why files are often large. It plays on desktop players but is a poor choice for modern web and mobile delivery. In everyday use, AVI is chosen for older recordings and legacy archives and desktop playback of vintage footage. It opens in VLC, Windows Media Player, and most desktop players.
About the FLV format
FLV was the standard for streaming Flash video in the 2000s. With Flash discontinued, converting FLV to MP4 is usually necessary to play these files on modern devices and browsers. In everyday use, FLV is chosen for recovering old Flash-era recordings and archives from legacy streaming sites. It opens in VLC and legacy players only.
AVI vs FLV
AVI is best known for widely readable on Windows desktop players, while FLV stands out for small files for early web streaming. Choosing between them comes down to where the file needs to go next.
Common use cases
People convert AVI to FLV for jobs such as recovering old Flash-era recordings and archives from legacy streaming sites. It is especially common when a AVI file arrives from one system but needs to work in another that standardises on FLV.
When to convert AVI to FLV
Reach for AVI to FLV when your destination expects FLV — for example recovering old Flash-era recordings and archives from legacy streaming sites. It is the right move when you receive a AVI file but the app, website, or person you are working with cannot use it. Bear in mind that obsolete and unsupported by modern browsers, so keep your original AVI if you might need it again.
How to convert AVI to FLV
- Upload your AVI file to the converter at the top of this page - FLV is already selected as the output.
- Check the size limit shown on this page, then drag and drop or browse for your file.
- Confirm FLV is still the target format, or pick a different one from the grid.
- Start the conversion and download your FLV file the moment it is ready.
Quality tips
Keep one master AVI archived and convert copies. If the FLV file is for web playback, test it in the target browser or player; if you only need the sound, use our Extract Audio tool instead of a full video conversion.
Platform compatibility
The AVI to FLV converter runs on Windows, macOS, Linux, Android, and iOS - anywhere with a modern browser, with no plugins or permissions required. Once exported, FLV opens in VLC and legacy players only.
File size limits
Video/audio up to 2GB
Troubleshooting
- If the file exceeds the limit shown below, compress images, trim video, or split archives before retrying.
- If conversion fails, confirm the extension matches the real format — renaming a file alone does not change its contents.
- Very large videos process faster if you trim them first with our Video Trim tool.
- If quality looks soft, try a less aggressive setting when the converter offers options.
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