Convert FLV to AVI Online Free
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Convert Flash Video FLV files to AVI format for broad media player compatibility and Windows-based video editing workflows. ChangeThisFile uses FFmpeg on secure servers — no installation needed.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile converts FLV to AVI using FFmpeg, a professional-grade multimedia framework, to transcode FLV files to AVI format with optimized codec settings and quality preservation. Free with no signup required. Files are encrypted during transfer and automatically deleted from our servers after conversion.
FLV vs AVI: Format Comparison
Key differences between the two formats
| Feature | FLV | AVI |
|---|---|---|
| Full Name | Flash Video | Audio Video Interleave |
| Developer | Adobe Systems | Microsoft |
| Primary Use | Web streaming (Flash era) | Desktop playback and editing |
| Video Codec | H.263, VP6, H.264 | DivX, Xvid, H.264, MPEG-4 |
| Audio Codec | MP3, AAC, Nellymoser | MP3, PCM, AC-3 |
| Player Support | Flash Player (deprecated), VLC | Windows Media Player, VLC, most players |
| Editing | Limited | Widely supported by editing software |
| File Size | Compact | Varies (often larger than FLV) |
When to Convert
Common scenarios where this conversion is useful
Windows Video Editing Import
Convert FLV footage into AVI for import into Windows video editing software like Adobe Premiere, Sony Vegas, or Windows Movie Maker.
Windows Media Player Compatibility
Convert Flash Videos to AVI so they can be played in Windows Media Player with standard H.264 codec packs without requiring Flash Player.
Legacy Flash Archive Conversion
Migrate FLV video archives to AVI format for broader compatibility with older Windows-based media tools and players.
DVD Authoring Workflows
Convert FLV source video to AVI as an intermediate format for DVD authoring software that accepts AVI input.
Desktop Media Library Organization
Normalize a mixed FLV and video library to AVI format for consistent playback and management in desktop media players.
Who Uses This Conversion
Tailored guidance for different workflows
Content Creators
- Convert FLV footage to AVI for playback in software and devices that expect the AVI format
- Transform FLV recordings to AVI to match the format an existing workflow or player requires
Video Editors
- Convert FLV footage to AVI for importing into editing software like Premiere or DaVinci Resolve
- Transform FLV project exports to AVI for client delivery or final distribution
Social Media Managers
- Convert FLV videos to AVI for compatibility with legacy players or archival systems that use AVI
- Transform FLV source files to AVI when a specific tool only accepts AVI input
How to Convert FLV to AVI
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1
Upload Your FLV File
Drag and drop or click to upload your Flash Video FLV. The upload is encrypted over HTTPS for secure transmission.
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2
FFmpeg Converts to AVI
Our servers use FFmpeg to transcode your FLV into the AVI container with H.264 video and MP3 audio for broad Windows and cross-platform media player support.
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3
Download Your AVI File
Download your converted AVI when ready. The original FLV is deleted from our servers automatically after your download.
Developers: convert via API →
Frequently Asked Questions
AVI is a widely supported format for desktop media players and video editing software. Converting FLV to AVI makes Flash Video accessible without Flash Player, especially for Windows workflows.
The converted AVI uses H.264 video encoding with MP3 audio, providing broad compatibility with Windows Media Player and most desktop media players.
Some quality loss occurs from transcoding. ChangeThisFile uses FFmpeg with high-quality settings to minimize visible quality differences.
FFmpeg handles H.264, H.263, and VP6 video codecs in FLV, as well as MP3, AAC, and Nellymoser audio codecs.
Files up to 25MB (free tier; 100MB with eligible paid browser access) are supported. Split or trim larger FLV files before uploading.
Yes. Files are uploaded over HTTPS and automatically deleted from our servers immediately after your download.
Most conversions finish within 30-90 seconds. Larger files may take slightly longer depending on server load.
Yes. AVI with H.264 encoding is widely supported by Premiere, Vegas, DaVinci Resolve, and other editing software.
Yes. The output AVI maintains the source FLV resolution and frame rate during conversion.
Yes. Completely free — no accounts, no subscriptions, no watermarks.
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Need to convert programmatically?
Use the ChangeThisFile API to convert FLV to AVI in your app or script. Free tier included.
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