Convert AVI to FLV
Convert AVI files to FLV locally, completely free and with maximum privacy.
Drag and drop your files here
or click to browse local files (large files supported, limited only by browser RAM)
Upload FilesPlatform Statistics
How to convert AVI to FLV
- Drop your .avi files above, or click Upload Files. You can add many files at once.
- FLV is already selected as the output. Open the settings (gear icon) to fine-tune the result.
- Click Convert All. FFmpeg runs inside your browser through WebAssembly; nothing is uploaded.
- Download your .flv files as soon as each one finishes.
What to know about AVI to FLV conversion
- The video is re-encoded to H.264 video and AAC audio so it plays wherever FLV is supported, and odd frame sizes are adjusted automatically.
- You can change the resolution, frame rate, playback speed and quality (CRF) before converting.
AVI vs FLV
| Feature | AVI (Audio Video Interleave) | FLV (Flash Video) |
|---|---|---|
| Codecs used by PureConverter | H.264 video and MP3 audio | H.264 video and AAC audio |
| Best for | compatibility with older Windows software | legacy Flash-based players and old streaming setups |
| Opens in | Windows Media Player, VLC, mpv and most media players | VLC, mpv and most media players |
AVI (Audio Video Interleave): A classic Microsoft multimedia container format supporting synchronous audio-with-video playback.
FLV (Flash Video): A legacy streaming video container popularised by Adobe Flash Player.
Conversion options
- Resolution: original, 1080p, 720p, 480p or 360p
- Frame rate and playback speed (0.5× to 2×)
- Quality presets or a custom CRF value, and lossless mode
- Audio bitrate, sample rate and channels
Frequently asked questions
Is it safe to convert AVI to FLV here?
Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.
Is there a file size limit?
There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.
Can I convert several AVI files at once?
Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.
Related conversions
Need the opposite? Convert FLV to AVI.
Convert AVI to other formats
- AVI to MP4
- AVI to MP3
- AVI to WEBP
- AVI to GIF
- AVI to WAV
- AVI to MOV
- AVI to M4A
- AVI to FLAC
- AVI to WEBM
- AVI to MKV
- AVI to AAC
- AVI to OGG
Convert other formats to FLV
- MP4 to FLV
- MOV to FLV
- WEBM to FLV
- MKV to FLV
- WMV to FLV
- M4V to FLV
- MPEG to FLV
- TS to FLV
- 3GP to FLV
- OGV to FLV
See every AVI converter and FLV converter, or browse the full converter directory.