AVI to MP4 Converter
Convert your AVI videos to MP4 format instantly. Free, fast, and secure. All conversions happen in your browser using FFmpeg.wasm.
Need the reverse?
MP4 to AVI Converter
Upload AVI File
Select or drag and drop your AVI file here (one file at a time)
Drag & drop files here
or click to browse from your device
About MOV and MP4 Formats
What is MOV?
MOV is Apple's proprietary video format developed for QuickTime Player. Created in 1991, MOV files use MPEG-4 encoding and can contain multiple tracks of video, audio, text, and effects. It's the default format for videos recorded on iPhone and Mac devices, offering high quality but limited compatibility outside the Apple ecosystem.
What is MP4?
MP4 (MPEG-4 Part 14) is the international standard for digital video, developed by the Moving Picture Experts Group. It's universally supported across all devices, platforms, and media players. MP4 uses efficient H.264 or H.265 compression to deliver excellent video quality with smaller file sizes, making it ideal for streaming and sharing.
MOV vs MP4: Detailed Comparison
| Feature | MOV | MP4 |
|---|---|---|
| Compatibility | Apple devices only | Universal (all devices) |
| File Size | Larger (less compression) | Smaller (efficient) |
| Quality | Excellent (lossless option) | Excellent (lossy) |
| Streaming | Limited support | Optimized for streaming |
| Social Media | Often rejected | Fully supported |
| Editing | Better for editing | Good for final output |
| Best For | Apple ecosystem | Sharing & distribution |
When to Convert MOV to MP4
1. Social Media Uploads
YouTube, Instagram, TikTok, and Facebook all prefer MP4 format. While some platforms accept MOV, they often re-encode it with quality loss. Converting to MP4 first gives you control over quality and ensures faster upload times.
2. Cross-Platform Sharing
When sharing videos with Android, Windows, or Linux users, MP4 is essential. MOV files may not play on non-Apple devices without additional software. MP4 ensures everyone can watch your videos without compatibility issues.
3. Website and Blog Embedding
HTML5 video players universally support MP4. If you're embedding videos on your website, WordPress blog, or e-commerce site, MP4 ensures smooth playback across all browsers and devices. MOV may not work in Chrome, Firefox, or Edge.
4. Email Attachments
MP4 files are typically 30-50% smaller than equivalent MOV files, making them better for email. Many email services have attachment size limits (25MB for Gmail). Converting to MP4 helps you stay within these limits while maintaining quality.
5. Video Streaming Services
Professional streaming platforms like Vimeo, Wistia, and video hosting services require MP4 format. MP4's efficient compression and streaming optimization make it the industry standard for online video delivery.
How to Convert MOV to MP4
Using Our Free Online Converter
- Click the upload area or drag your AVI file into the converter
- Wait for the file to upload (happens in your browser)
- Click "Convert to MP4" to start the conversion process
- Wait for FFmpeg.wasm to process your video (first time may take longer)
- Download your converted MP4 file
Conversion Settings
Our converter uses H.264 codec with AAC audio, which provides the best balance of quality, file size, and compatibility. The output MP4 maintains the original resolution and frame rate while optimizing compression for smaller file sizes.
Technical Details
We use FFmpeg.wasm, a WebAssembly port of the industry-standard FFmpeg tool. This means all conversion happens in your browser - your videos never leave your device. The first conversion loads ~30MB of FFmpeg libraries, but subsequent conversions are much faster. We use optimized settings (ultrafast preset with multi-threading) for 3-5x faster conversion compared to standard settings.
Alternative Methods
On Mac
Use QuickTime Player: File → Export As → choose quality. Or use iMovie for more control over export settings. Both are free but slower for batch conversions.
On Windows
VLC Media Player (free) can convert MOV to MP4: Media → Convert/Save → Add file → Convert → Profile: Video - H.264 + MP3 (MP4). HandBrake is another excellent free option.
On iPhone
iOS doesn't have built-in MOV to MP4 conversion. Use our online tool or download apps like Video Converter or Media Converter from the App Store.