Free · No Upload · Instant

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

Convert FLV to MTS online for free. Fast, private Flash Video 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 FLV to MTS

Upload your FLV 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 FLV Format

Extension: .flv
Full name: Flash Video

About MTS Format

Extension: .mts
Full name: AVCHD Video

Frequently Asked Questions

Is it safe to convert FLV 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 FLV 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 FLV 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 FLV file, and download the converted MTS file.

Will I lose quality converting FLV 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 FLV files to MTS?

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

What is the difference between FLV and MTS?

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

Why Convert FLV 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

→FLV (Flash Video) 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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