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3G2 to MKV Converter

Convert 3G2 to MKV online for free. Fast, secure, and high-quality conversion with no sign-up or software required.

Free to useNo file stored beyond 1 hourEncrypted over TLS 1.2/1.3No watermarks

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How it works

Three steps to your converted file

Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.

01

Upload your file

Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.

02

Choose an output format

Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.

03

Convert & download

Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.

What is a 3G2 file?

The 3G2 file format is a multimedia container defined by the 3rd Generation Partnership Project 2 (3GPP2) for use on CDMA2000-based mobile networks. It is structurally similar to the MP4 format but is optimized to minimize storage and bandwidth usage on legacy mobile devices. The format stores video streams typically encoded with MPEG-4 Part 2 or H.263, and audio streams using EVRC, EVRC-B, QCELP, or SMV codecs. 3G2 files are compliant with the ISO base media file format (ISO/IEC 14496-12) but possess extensions specific to the 3GPP2 specifications.

How to open a 3G2 file

While 3G2 was native to early CDMA mobile phones, modern desktop operating systems often lack native support for its specific audio codecs like EVRC. Apple QuickTime Player and Microsoft Windows Media Player may open these files if the appropriate DirectShow filters are installed. For universal compatibility across Windows, macOS, and Linux, the VLC media player is recommended as it utilizes the FFmpeg library to decode 3GPP2 streams without external codec packs.

3G2 Technical Info

Full Name
3rd Generation Partnership Project 2 File Format
Developed By
3GPP2
Initial Release
2003
MIME Type
video/3gpp2

What is an MKV file?

The Matroska Video (MKV) file is an open-standard, free container format capable of holding an unlimited number of video, audio, picture, or subtitle tracks in one file. Unlike proprietary containers, Matroska is structured upon Extensible Binary Meta Language (EBML), allowing for significant flexibility and forward compatibility. It supports a vast array of codecs, including H.264, VP9, HEVC, AAC, Vorbis, and FLAC, and is particularly noted for its support of soft subtitles (SSA/ASS) and chapter entries, making it a standard for high-definition video distribution (HD) and anime fansubs.

How to open an MKV file

Native support for MKV is available in Windows 10/11 via the Movies & TV app and generally on Linux distributions. macOS requires third-party software, as QuickTime Player does not natively parse the Matroska container. The industry-standard solution for all operating systems is VLC Media Player, which includes built-in libraries for decoding the diverse codecs often encapsulated within MKV files. Alternative options include MPV and MPC-HC (Windows).

MKV Technical Info

Full Name
Matroska Video Container
Developed By
Matroska (non-profit)
Initial Release
2002
MIME Type
video/x-matroska

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Why RunConvert

The fastest way to convert any file

Purpose-built for speed, privacy, and breadth of format support.

Convert 3G2 to MKV in seconds

Every 3G2 to MKV conversion runs on our servers, so your device stays fast and the output quality stays intact.

Fast, cloud-powered

No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.

Secure & private

Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.

Free - no account needed

Convert without creating an account - no credit card, no trial clock. Sign in only if you want history and higher daily limits.

Developer API

Convert 3G2 to MKV via API

Automate 3G2 to MKV conversions in three steps: create a job, upload your file, then poll for the result.

# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tag": "3g2-to-mkv",
    "tasks": {
      "upload-file": {
        "operation": "import/upload"
      },
      "convert": {
        "operation": "convert",
        "input": "upload-file",
        "output_format": "mkv"
      },
      "export-result": {
        "operation": "export/url",
        "input": "convert"
      }
    }
  }'

# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.3g2

# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
  -H "Authorization: Bearer YOUR_API_KEY"

Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.