3G2 to MTS Converter

Convert 3G2 to MTS Online

This converter rewraps a .3g2 clip — the 3GPP2 video an old CDMA phone (Verizon- or Sprint-class network) recorded — into an .mts file, the AVCHD format Sony, Panasonic, Canon, and JVC HD camcorders write to. The one real reason to do this is to drop those old phone memories into a video-editing project alongside genuine camcorder footage. It is a narrow, editing-only job: if you just want a clip that plays and shares, the 3G2 to MP4 converter is almost certainly what you actually want, because MP4 plays on virtually every phone, browser, and app while MTS does not.

How to Convert 3G2 to MTS

1. Upload Your 3G2 File: Drag and drop your .3g2 file onto the page, or click "+ Add Files" to browse. You can queue several clips and they all convert with the same settings.
2. Set Video Codec and Audio Codec: Open the codec options. Leave Video Codec on H.264 and Audio Codec on AAC — that is the standard AVCHD payload an MTS file is expected to carry, and the defaults already match it. Switch Audio Codec to AC3 (Dolby Digital) only if your editor specifically asks for Dolby audio.
3. Set Video resolution to "Keep original": A feature-phone clip has no HD detail to recover, so leave resolution alone rather than upscaling to 1080p — stretching a tiny frame only makes it soft and blocky. Use Trim if you only need part of the clip.
4. Convert and Download: Click "Convert" and download the .mts file. No sign-up, no watermark.

3G2 vs MTS — What's Actually Inside Each

Frequently Asked Questions

Why would I convert 3G2 to MTS instead of MP4?

In almost every case you wouldn't. MTS (AVCHD) is a camcorder and editing format, not a sharing format — its one genuine use is importing old phone footage into a video-editing project alongside clips from a Sony, Panasonic, Canon, or JVC HD camcorder that already record .mts. For playback, sending, uploading, or archiving, convert to MP4 with the 3G2 to MP4 converter, which plays on virtually every device and app. Pick MTS only when an AVCHD workflow specifically asks for it. The .3gp (GSM) cousin of this format does the same conversion through the 3GP to MTS converter.

Will converting 3G2 to MTS make my old phone video look HD?

No. The footage stays exactly as detailed as the phone originally recorded it — usually around 176x144 or 352x288. Wrapping it in an MTS container, or setting a 1080p resolution preset, does not create detail that was never captured; upscaling only stretches the existing pixels across a larger frame and looks soft or blocky. Note too that 3G2 video is already lossy (H.263 or MPEG-4 Part 2 on most phones, H.264 on a few later ones), so re-encoding it to H.264 for MTS is a lossy-to-lossy pass — a second compression step that repackages the footage rather than remastering it. To keep the picture as clean as the source allows, set Video resolution to "Keep original" and let your editor scale it on the timeline if needed.

What video and audio codec does the MTS output use?

By default the converter outputs H.264 (MPEG-4 AVC) video with AAC audio, which is the codec pairing AVCHD tools expect inside an .mts file. AVCHD natively supports Dolby AC-3 and linear PCM audio, so you can switch Audio Codec to AC3 if your editor specifically wants Dolby. Leaving Video Codec on H.264 is almost always correct — other codecs will produce a file most AVCHD software refuses to import.

Why does my converted MTS audio sound like a phone recording?

Because that is what the 3G2 captured. Many feature-phone 3G2 clips store AMR-NB audio or a CDMA speech vocoder (EVRC, QCELP/13K, SMV, VMR-WB) — codecs built for the telephone voice band, sampling at just 8 kHz and keeping only roughly 200 Hz–3,400 Hz. Re-encoding that to AC-3 or AAC inside the MTS preserves the speech faithfully, but no codec or bitrate can restore the high and low frequencies a speech codec never recorded. For a spoken voice memo that is fine; for music captured on an old phone, the fidelity simply isn't there to recover. If your 3G2 is from a retired Verizon or Sprint phone — Verizon shut off its 3G CDMA network on December 31, 2022 — the file on disk still converts fine; a dead network has no bearing on a clip already saved to storage.

How are my files handled, and how long do you keep them?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public. In our testing, a 30-second 352x288 3G2 clip kept at its original resolution produced a roughly 3-6 MB MTS file at default H.264/AAC settings; pushing the resolution preset up to 1080p inflated the file several times over without making the picture any sharper. To go the other way — pulling a camcorder .mts clip back down to a small CDMA-phone container — use the MTS to 3G2 converter.