AVI to MP4 Converter
Convert AVI video files to MP4 format. Reduce file size and ensure compatibility everywhere. Free and runs in your browser.
Drop your AVI file here or click to browse
Max file size: 200 MB
How to Convert AVI to MP4
Select Your AVI File
Click the upload area or drag and drop your AVI video. Max file size is 200 MB.
Convert to MP4
Click Convert and your AVI will be re-encoded to H.264 MP4 with smaller file size.
Download MP4
Save the MP4 file. Upload to social media, share, or play on any device.
Frequently Asked Questions
What is AVI and why should I convert to MP4?
AVI (Audio Video Interleave) is a legacy video format from Microsoft. AVI files are often very large and lack support on modern platforms. MP4 (H.264) is the current standard, offering much smaller file sizes and universal compatibility across all devices and social media.
How much smaller will my MP4 file be?
MP4 files are typically 50-80% smaller than AVI files at comparable quality. H.264 compression is far more efficient than the older codecs commonly used in AVI containers.
Will converting AVI to MP4 reduce video quality?
There is minimal quality loss. The converter uses H.264 encoding with AAC audio, which provides excellent quality at much smaller file sizes. For most use cases, the difference is imperceptible.
Can I upload the MP4 to social media?
Yes! MP4 (H.264) is the standard format accepted by all major platforms including Instagram, TikTok, YouTube, Facebook, Twitter, and LinkedIn. AVI files are generally not accepted by these platforms.
How long does the conversion take?
Conversion time depends on the file size and your device. A typical 1-minute video converts in 15-60 seconds. Since AVI files can be large, longer videos will take more time.
Is my video uploaded to a server?
No. All processing happens locally in your browser using WebAssembly technology. Your video never leaves your device, ensuring complete privacy.
Try our other free tools
Guides & Articles
Ready to create high-performing creatives?
Generate image, video, and UGC ads in minutes with HighReach.
No credit card required