Published on Jul 11, 2025 5 min read

Best Free Video Converters for MTS/M2TS to AVI Format

File compatibility can be a hassle when you’re editing or sharing videos, especially with formats like MTS or M2TS from certain camcorders that don’t work well with standard players or software. Converting these files to a more versatile format like AVI can solve the issue. Whether you’re editing, sharing, or preserving memories, this guide covers the best free tools to make conversions quick and easy.

Understanding MTS and M2TS Files

MTS and M2TS files are high-definition video formats commonly generated by AVCHD camcorders, such as those from Sony and Panasonic. These files are designed to preserve significant video quality, making them perfect for HD recording. However, their heavy use of compression and proprietary nature often causes compatibility issues with many devices or software platforms. By converting MTS/M2TS files to AVI—a widely-supported format—you’ll have a more flexible file type that works seamlessly across players and editors.

Why Convert to AVI?

Here are three important reasons why converting MTS/M2TS files to AVI is worth it:

1. Better Compatibility – AVI files work smoothly with common media players (e.g., VLC, Windows Media Player) and editing tools like Adobe Premiere Pro or DaVinci Resolve.
2. Reduced File Size – While AVI may still support high-quality resolution, it is often more compressed than MTS/M2TS, making files smaller and easier to manage.
3. Ease of Sharing – AVI files can be uploaded and shared across platforms like YouTube, Dropbox, or even email without encountering format issues.

The Top Free Tools to Convert MTS/M2TS to AVI

These are the top free tools to keep in mind to make the conversion process simple and easy. All these tools are convenient, effective, and cost nothing.

1. HandBrake

HandBrake is a widely trusted open-source video conversion tool, ideal for efficiently processing MTS/M2TS files while maintaining quality. Its user-friendly interface makes it a top choice for video editing enthusiasts.

Key Features:

• Completely free and open-source
• Supports batch conversions
• Allows customization of file settings, such as resolution and bitrate
• Works on Windows, macOS, and Linux

How to Use HandBrake to Convert MTS/M2TS to AVI:

1. Download and install HandBrake from the official website.
2. Open HandBrake and drop your MTS or M2TS file into the workspace.
3. Choose AVI as the output format in the “Format” dropdown menu.
4. Adjust resolution, frame rate, or bitrate if needed.
5. Hit “Start Encode” to convert your file.

2. Freemake Video Converter

Freemake Video Converter is an easy-to-use tool preferred by beginners. It supports a wide range of video formats, including MTS/M2TS, and outputs to AVI with just a few clicks.

Key Features:

• Intuitive drag-and-drop interface
• Converts videos to over 500 formats, including AVI
• Includes basic video editing features like clipping and trimming

How to Use Freemake Video Converter:

1. Install Freemake Video Converter from its official website.
2. Add your MTS/M2TS file by dragging it into the interface.
3. Choose “to AVI” as the output format.
4. Click “Convert” to process your file.

While the software is free, some features (like watermark-free files) may require registration.

3. Convertio

If you’re looking for a web-based option, Convertio is one of the best online tools available. There’s no need to install software, making it convenient for quick, one-off conversions.

Key Features:

• Browser-based, no installation required
• Converts files up to 100MB for free
• Supports drag-and-drop functionality for easy uploads

How to Use Convertio:

1. Go to the Convertio website and click on the “Choose Files” button.
2. Select the file you want to convert from your computer, or drag and drop it into the designated area.
3. Choose your desired output format from the dropdown menu.
4. Click on the “Convert” button to start the conversion process.
5. Once the conversion is complete, download your converted file or save it directly to a cloud storage service like Google Drive or Dropbox.

4. FFmpeg

For tech-savvy users or those who prefer command-line tools, FFmpeg is an incredibly powerful choice. It supports nearly every video format and offers advanced control over the conversion process.

Key Features:

• Completely free, open-source software
• Supports intricate customization of output files
• Compatible with all major operating systems

How to Use FFmpeg to Convert MTS/M2TS to AVI:

1. Download FFmpeg from its official site.

2. Open the command prompt (or terminal) and input the following command:

   ffmpeg -i input.mts output.avi

3. Customize the command to include specific codecs, resolution, or bitrate as needed.

While FFmpeg has a steeper learning curve, it’s an excellent choice for advanced users looking for flexibility and control.

5. VLC Media Player

While best known as a media player, VLC doubles as a basic video converter. It’s a great all-in-one option if you already have VLC installed and want to avoid downloading new software.

Key Features:

• Free to use with no limitations
• Built-in support for MTS/M2TS and AVI formats
• Works across Windows, macOS, and Linux

How to Use VLC for Conversion:

1. Open VLC and click on “Media” → “Convert/Save.”
2. Add your MTS or M2TS file and click “Convert/Save.”
3. Choose AVI as the destination format.
4. Specify the output destination and click “Start” to begin the conversion.

Helpful Tips for Best Results

• Back Up Your Files: Before converting, back up your original MTS/M2TS files in case something goes wrong during the process.
• Check File Size: Some tools may significantly compress the file. If preserving quality is a priority, tweak bitrate and resolution settings.
• Experiment with Settings: Adjust frame rates and codecs to better suit your needs, especially if you’re preparing files for professional editing.

Final Thoughts

By using one of the free tools mentioned above, you can quickly convert MTS/M2TS files to AVI without breaking a sweat. Whether you prefer software like HandBrake and Freemake Video Converter or need a lightweight online option like Convertio, there’s a solution that fits every skill level and project requirement. No more file compatibility issues, unnecessary delays, or jagged workflow transitions. Take control of your videos and make sharing or editing simpler today.