AVI to MP4 Converter — Free Online
Modernize AVI videos to MP4 for streaming, sharing, and mobile playback.
Upload your files
Drag and drop files here, or click to browse
Supported File Types
Images
Documents
Audio
Video
Archives
Spreadsheets
Maximum file size: 100MB per file • All processing happens locally • Your files never leave your device
How do I convert AVI to MP4 for free?
ConvertifyHub converts AVI files to MP4 using WebAssembly in your browser, keeping your footage private instead of sending it to a cloud converter farm. AVI was common on older Windows cameras and screen recorders but is poorly supported on phones, smart TVs, and social platforms that expect H.264 MP4. Upload your AVI, select MP4 output, adjust quality, and download a widely compatible file. Client-side processing means home videos, surveillance clips, and training recordings stay on your device. No account, no watermark, and no install required — ideal when you need a quick format fix before uploading to YouTube, Slack, or Google Drive.
Browse all formats on our Video Converter or read the step-by-step guide.
Frequently Asked Questions
Why won't my phone play AVI files?
Most mobile devices natively support MP4 (H.264) but not all AVI codecs. Converting to MP4 fixes playback.
How long does conversion take?
Depends on file length and your device CPU. Short clips typically finish in under a minute.
Is there a file size limit?
Very large videos are limited by available browser memory on your device.