Free · No Upload · Instant

Convert AVI to MTS Free Online — Best AVI to MTS Converter 2025

Convert AVI to MTS online for free. Fast, private Audio Video Interleave to AVCHD Video converter — no upload, no signup. Works in your browser instantly.

Choose Files

or drag and drop files here

Max file size: 2GB

Your files are processed locally in your browser. Nothing is uploaded to any server.

How to Convert AVI to MTS

Upload your AVI file by clicking "Choose Files" or drag and drop it.

Select MTS as the output format.

Click "Convert Now" and download your converted file.

About AVI Format

Extension: .avi
Full name: Audio Video Interleave

About MTS Format

Extension: .mts
Full name: AVCHD Video

Frequently Asked Questions

Is it safe to convert AVI to MTS online?

Yes! Convert999 processes all files directly in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

How long does it take to convert AVI to MTS?

Conversion is nearly instant for most files. Large files may take a few seconds depending on your device's processing power.

Is there a file size limit?

Convert999 supports files up to 2GB. Processing happens locally, so larger files depend on your device's available memory.

Do I need to install any software?

No installation required. Convert999 works entirely in your web browser on any device.

Can I convert AVI to MTS on my phone?

Yes! Convert999 works on any device with a web browser — iPhone, Android, iPad, or desktop. No app installation required. Simply open the converter, upload your AVI file, and download the converted MTS file.

Will I lose quality converting AVI to MTS?

Convert999 uses high-quality conversion algorithms to minimize quality loss. For lossless formats, the conversion is exact. For lossy formats like images and audio, we use optimized settings that balance quality and file size.

Can I batch convert multiple AVI files to MTS?

Yes, Convert999 supports batch conversion. Select or drag & drop multiple AVI files and convert them all to MTS format at once. Each file is processed locally in your browser.

What is the difference between AVI and MTS?

Audio Video Interleave (AVI) and AVCHD Video (MTS) differ in compression, compatibility, and features. AVI is optimized for its native use cases, while MTS may offer different advantages. Visit our AVI vs MTS comparison page for a detailed breakdown.

Why Convert AVI to MTS?

Advantages

✓AVCHD Video offers better compatibility with modern applications and workflows
✓Converting is completely free with no file size limits on Convert999
✓Your files never leave your device — 100% private and secure conversion
✓Instant conversion without waiting for server processing

Key Differences

→AVI (Audio Video Interleave) is optimized for its native use cases
→MTS (AVCHD Video) may offer different compression or feature set
→Choose based on your target platform, quality needs, and file size requirements

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AVI vs MTS

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