Video Format Comparison
Not all video formats are created equal. Here's what you need to know about each one:
| Format | Best For | Compatibility | File Size |
|---|---|---|---|
| MP4 | Everything — web, mobile, social media | Universal | Small |
| AVI | Legacy software, Windows applications | Windows-centric | Large |
| MOV | Apple ecosystem, Final Cut Pro | Apple + some Windows | Medium-Large |
| MKV | Movies with multiple audio/subtitle tracks | VLC, media players | Varies |
| WEBM | Web video, HTML5 players | Browsers | Small |
| FLV | Legacy Flash content | Limited (declining) | Small |
| WMV | Legacy Windows Media | Windows only | Medium |
Which Format Should You Use?
How to Convert Videos Online
- Go to the RnBulkTools Converter — no signup needed
- Upload your video — drag and drop or click to select. Files up to 500MB are supported.
- Choose your target format — select MP4, AVI, MOV, MKV, WEBM, or any other format from the dropdown.
- Click Go — conversion happens on our server using FFmpeg. Download when complete.
You can queue up to 5 videos and convert them all at once.
Common Conversions
MOV to MP4
The most common conversion for iPhone users. MOV files from your iPhone camera can be large and incompatible with some platforms. Converting to MP4 reduces file size and ensures universal compatibility.
AVI to MP4
AVI is a legacy format that produces large files. Converting to MP4 typically reduces file size by 50-80% with minimal quality loss.
MKV to MP4
MKV is great for archiving but doesn't play natively on many devices. Converting to MP4 makes your videos playable on phones, tablets, smart TVs, and any media player.
Video to Audio
RnBulkTools also extracts audio from video. Convert MP4 to MP3, MOV to WAV, MKV to FLAC — any video format to any audio format.