Convert FLV to AVI Online
Effectively dead — Flash Player was discontinued in 2020, and no modern browser supports FLV natively. Converting to AVI gives you a key advantage: extremely simple container structure that every windows media tool has supported since 1992. AVI is best for storing uncompressed or lightly compressed video for editing on windows-based workflows.
Why Convert FLV to AVI?
Effectively dead — Flash Player was discontinued in 2020, and no modern browser supports FLV natively — converting to AVI overcomes this by providing extremely simple container structure that every windows media tool has supported since 1992
AVI is the right choice when you need to: working with legacy windows video archives from the divx/xvid era
Gain broader compatibility — AVI works with Windows Media Player, VLC, FFmpeg, most video editors; macOS and Linux via third-party players
Your FLV files were created for converting archived flv files from early youtube downloads to modern mp4, but now you need a format suited to different workflows
FLV vs AVI — Format Comparison
Flash Video (.flv)
Audio Video Interleave (.avi)
How to Convert FLV to AVI
Upload your FLV file
Drag your .flv file onto the upload area or click to browse. We accept FLV files up to 1 GB.
Choose AVI as output format
Select .avi (Audio Video Interleave) from the format list. Configure any format-specific settings to match your requirements.
Convert and download
Click Convert and wait for processing. Your AVI file will be ready to download in seconds. The result is optimized for storing uncompressed or lightly compressed video for editing on windows-based workflows.
Frequently Asked Questions
Is the FLV to AVI conversion lossless?
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When both formats support lossless data, the conversion preserves all content. Depends on codec (DivX, Xvid, MJPEG, uncompressed); container supports up to 4K resolution.
How large will my AVI file be compared to the original FLV?
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FLV files are typically 5 MB – 1 GB, while AVI files are typically 50 MB – 20 GB. The actual size depends on content complexity and any quality settings you choose.
What software can open the converted AVI file?
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AVI is compatible with: Windows Media Player, VLC, FFmpeg, most video editors; macOS and Linux via third-party players.
What is the maximum file size I can convert?
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PureConverter accepts FLV files up to 1 GB. Your files are processed securely and deleted from our servers after conversion.
What's the difference between FLV and AVI?
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FLV (Flash Video) is best for playing legacy flash video content from the pre-html5 era of web video. AVI (Audio Video Interleave) is best for storing uncompressed or lightly compressed video for editing on windows-based workflows. Key tradeoff: FLV's advantage is extremely small file sizes for its era, with fast seeking and low-latency streaming capabilities, while AVI's advantage is extremely simple container structure that every windows media tool has supported since 1992.
Pro Tips for FLV to AVI Conversion
Review the output AVI file to ensure all formatting and content transferred correctly from your FLV source
Keep a backup of your original FLV file — while our conversion is reliable, having the source is always recommended
AVI works especially well for: importing old home videos into modern editing software for re-encoding
Did you know? AVI is based on Microsoft's RIFF (Resource Interchange File Format), the same container used by WAV audio files — both formats share the exact same chunk-based binary structure.
Ready to Convert?
Upload your FLV file above and get your AVI in seconds. Free, fast, and secure.