ChangeMyFile - Free Online File ConverterChangeMyFile
Trusted by thousands of users worldwide

Video Converter – Convert Any Video Format Free

Convert MP4, MKV, MOV, AVI, WEBM and 15+ video formats instantly

Step 1: Upload your files

You can also Drag and drop files.

Step 2: Choose format
Step 3: Convert files

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500+ Formats
Lightning Fast
100% Secure
Always Free
Cloud Processing

All Video Formats

Click any format to see all available conversions for that file type.

3G23GPAVIFLVM4VMKVMOVMP4MPGMTSOGVVOBWEBMWMVMPEG

Popular Video Conversions

Quick access to the most commonly used video file conversions.

MKV to MP4MOV to MP4AVI to MP4WEBM to MP4FLV to MP4MP4 to MOVMP4 to WEBMMKV to MOVMPEG to MP4MPG to MP4WMV to MP43GP to MP4M4V to MP4VOB to MP4MTS to MP4

Free Online Video Converter

ChangeMyFile's video converter transforms your videos between 15+ formats instantly. Convert MKV to MP4 for universal playback, transform MOV files from your iPhone, or compress large video files – all free, all online, no software required.

Our cloud-based converter handles the heavy lifting, so you can convert videos on any device – even your phone or tablet.

Supported Video Formats

Our video converter supports all major video formats:

  • MP4 – The universal standard, plays on virtually every device
  • MKV – High-quality container popular for HD content
  • MOV – Apple's QuickTime format from iPhones and Macs
  • AVI – Classic Windows format, widely compatible
  • WEBM – Open format optimized for web streaming
  • WMV – Windows Media Video format
  • FLV – Flash video format from older web content
  • MPG/MPEG – Standard video compression format
  • MTS – AVCHD format from camcorders
  • 3GP – Mobile video format for older phones

Popular Video Conversions

The most common video conversions our users perform:

MKV to MP4

Convert MKV files to MP4 for universal compatibility. MP4 plays on all devices, smart TVs, and video players while MKV may not be supported everywhere.

MOV to MP4

Transform iPhone and Mac videos to MP4 format. MOV files from Apple devices often don't play on Windows or Android – MP4 works everywhere.

AVI to MP4

Convert older AVI files to modern MP4 format. Get smaller file sizes and better compatibility without sacrificing quality.

WEBM to MP4

Convert web-optimized WEBM videos to MP4 for offline playback and broader device support.

MP4 to WEBM

Optimize videos for web embedding with WEBM format, offering excellent compression for streaming.

Why Convert Video Formats?

Common reasons to convert your videos:

  • Device compatibility – Play videos on any TV, phone, or computer
  • File size – Reduce large video files for easier sharing and storage
  • Social media – Convert to formats required by Instagram, TikTok, or YouTube
  • Editing – Some video editors only accept certain formats
  • Streaming – Optimize videos for web playback with WEBM or MP4
  • Archive – Convert old formats like FLV or 3GP to modern standards

How to Convert Videos Online

  1. Upload your video – Select your video file (MP4, MKV, MOV, AVI, or any supported format)
  2. Choose output format – Pick your desired format from 15+ options
  3. Download converted video – Get your new video file ready for use

Convert multiple videos at once with batch processing. Upload up to 5 files and convert them all together.

Video Format Comparison

Choose the right format for your needs:

  • Best universal format: MP4 (H.264) – works on everything
  • Best quality: MKV – supports multiple audio/subtitle tracks
  • Best for web: WEBM – smallest file size for streaming
  • Best for Apple: MOV – native iPhone/Mac support
  • Best for Windows: WMV or AVI – built-in support

Pro Tip

Use MP4 with H.264 codec for maximum compatibility – it plays on 99% of devices including smart TVs, phones, and game consoles without any issues.

Common Mistake

Don't convert videos multiple times in a row. Each conversion can reduce quality. Always convert from your original source file for best results.

Best For

Use our video converter when you need to play videos on different devices, share large files more easily, or convert old formats to modern standards.

Not Recommended

Avoid converting already-compressed videos to even smaller formats if quality matters – you can't add back detail that's already been removed.

Frequently Asked Questions

Our video converter supports 15+ formats including MP4, MKV, MOV, AVI, WEBM, WMV, FLV, MPG, MPEG, MTS, 3GP, 3G2, OGV, VOB, and M4V. Convert between any of these formats freely.

Upload your MKV file, select MP4 as the output format, and click convert. Your MP4 file will be ready to download in minutes. No software installation needed.

Yes, our video converter is completely free. No signup required, no watermarks added to your videos, and no hidden fees. Convert as many videos as you need.

We use optimized settings to maintain the best possible quality during conversion. Some quality loss may occur when converting to more compressed formats, but it's typically minimal.

You can upload videos up to several hundred megabytes. For very large files, the conversion may take a few minutes depending on the video length and quality.

Yes! Our converter works in any web browser on any device – iPhone, Android, tablet, or computer. No app installation required.

MP4 is more universally compatible and plays on virtually all devices. MKV supports more features like multiple audio tracks and subtitles, but isn't supported by all players.

Conversion time depends on file size and length. A typical 5-minute video converts in 1-3 minutes. Longer or higher-quality videos may take more time.

Absolutely. Your videos are processed securely and automatically deleted from our servers within 24 hours. We never share or access your content.

Yes! Convert your video to MP3, WAV, or other audio formats to extract just the audio track. Perfect for saving music or creating podcasts from video content.