Upload your .avi file and get a smaller, optimized MP4. Works with AVI files from any source. Free, no account required.
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Drag & drop your .avi video file. We support files up to 500MB. No account needed.
SquishVideo converts and compresses your AVI to optimized MP4 H.264, reducing file size while preserving quality.
Get your compressed MP4 instantly. It's compatible with every platform, device, and browser.
AVI (Audio Video Interleave) is Microsoft's legacy video format from 1992. It was the dominant video format on Windows for over a decade. AVI files tend to be very large because the format often stores video with minimal compression (DivX, Xvid) or even uncompressed. Many screen recorders, CCTV systems, and legacy applications still output AVI.
AVI files tend to be very large compared to optimized MP4. Converting from AVI to MP4 H.264 typically reduces file size by 40-80% while maintaining excellent visual quality. The resulting MP4 also plays on every device and platform without compatibility issues.
AVI was developed by Microsoft in 1992. It uses the Audio Video Interleave container and typically contains DivX/Xvid/Uncompressed encoded video. Browser support is very limited, and mobile support is requires third-party apps. For streaming, AVI offers no capabilities.
Keep AVI if you're doing professional editing and need the original codec quality. Convert to MP4 when: you need to share the video online, upload to social media, send via email, or reduce storage usage. For 99% of sharing and consumption purposes, MP4 is the better format.
| Feature | AVI | MP4 (H.264) |
|---|---|---|
| Container | Audio Video Interleave | MPEG-4 Part 14 |
| Typical Codec | DivX/Xvid/Uncompressed | H.264 / H.265 |
| File Size | Very Large | Optimized (smallest) |
| Browser Support | Very limited | Universal |
| Mobile Support | Requires third-party apps | Universal |
| Streaming | No | Yes, natively |
When you upload a AVI file, SquishVideo first analyzes the video stream to understand its codec, resolution, framerate, and bitrate profile. We then transcode the video to H.264 MP4 using optimized encoding parameters. The entire process preserves audio quality (re-encoded to AAC) and maintains the original resolution unless a lower resolution would provide a better quality-to-size ratio.
AVI files typically come from: screen recorders (OBS, Camtasia), CCTV/security cameras, legacy video editors, and Windows applications.
SquishVideo supports 20+ video formats. Choose your input format:
Need your AVI video to fit a file size limit? Pick a target: