MTS Won't Open? Convert to 3G2 Instantly
Fast, instant MTS to 3G2 conversion. No signup required. Just drop your .mts file and get .3g2 in seconds.
Batch Settings
大切な思い出が詰まったMTS動画、スマートフォンや携帯電話で手軽に共有したいとお考えではありませんか？特に日本のビジネスシーンやプライベートでのやり取りでは、互換性の高いファイル形式が求められることがよくあります。MTSは高画質ですが、再生環境を選ぶことがありますよね。そこで、3G2形式への変換が役立ちます。3G2は、以前のガラケー時代から広く利用されてきた実績があり、様々なデバイスで安定して再生できるのが特長です。このページでは、MTSファイルを3G2に変換する手順を分かりやすくご案内します。お気に入りの動画を、いつでもどこでも、ストレスなくお楽しみいただけるよう、ぜひこの変換ツールをご活用ください。
- ビジネスのプレゼン資料に動画を添付
- 親しい友人にスマホで撮影した動画を共有
- 縦書きテキストが多いウェブサイトでの動画埋め込み
日本の携帯電話では、以前から3G2のような軽量な動画形式が普及しており、特にフィーチャーフォン時代からのユーザーには馴染み深い形式です。フォントの表示なども含め、より広範な環境での再生を考慮する際に有効です。
About MTS to 3G2 Conversion
Dealing with a MTS file that won't open on your device? You're not alone — MTS compatibility issues are one of the most common reasons people search for a file converter. MTS (AVCHD) is the format from camcorders recording in high-definition AVCHD.
The fix is simple: convert your MTS to 3G2. 3G2 is a widely used file format. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Converting MTS to 3G2 maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your MTS file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
This conversion is ideal when you When you need a 3G2 file.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert MTS to 3G2
- 1
Add your MTS file
Drag and drop your .mts file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick 3G2 output
Select .3g2 as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The video engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .3g2 file. For batch jobs, download all at once as a zip.
What Happens When You Convert MTS to 3G2
Your MTS file is decoded and re-encoded as 3G2.
Your MTS file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in 3G2 format
The converted file is ready for download
Format Comparison
MTS
.mts file
| Extension | .mts |
| MIME Type | video/mp2t |
| Category | Video |
3G2
.3g2 file
| Extension | .3g2 |
| MIME Type | video/3gpp2 |
| Category | Video |
Should You Convert MTS to 3G2?
When to Convert
- ✓When you need a 3G2 file
Frequently Asked Questions
Why won't my MTS file open?
MTS files may not open if your device lacks the right codec or application. Converting to 3G2 — a more widely supported format — usually resolves this. 3G2 is a widely used file format.
Is it safe to convert MTS to 3G2 online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting MTS to 3G2?
Converting MTS to 3G2 maintains high quality with CocoConvert's optimised encoder settings. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my MTS file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert MTS to 3G2 on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.