Convert 3GPP2 Multimedia (.3g2) to WebM Video (.webm) online for free. Fast, secure video conversion with no watermarks or registration.
Upload your .3g2 file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .webm file when it's ready.
WebM is Google's open-source video format for the web, combining VP8 or VP9 video with Vorbis or Opus audio in a Matroska-based container. Converting 3G2 to WebM transforms old CDMA phone recordings into the format designed specifically for HTML5 web playback. Every major browser (Chrome, Firefox, Edge, Opera) supports WebM natively, making it ideal for embedding old phone recordings on websites, blogs, or web applications.
WebM was engineered for efficient web streaming with low-latency seek and progressive download support built into the container format. For sharing old phone recordings via web pages — a family history site, a memorial blog, or an archival web project — WebM provides superior browser integration compared to MP4 on non-Apple browsers.
WebM is the preferred video format for open-source web development and Google's ecosystem. If you are embedding video on a website and want to avoid any potential patent concerns associated with H.264, VP9 in WebM is a completely royalty-free alternative with comparable quality. Google, Mozilla, and the open web community actively promote WebM as the standard web video format.
WebM also offers excellent compression efficiency with VP9. At equivalent quality to H.264, VP9 can produce files 20-30% smaller — though encoding is slower. For web delivery where bandwidth matters, VP9 WebM files load faster and stream more smoothly, especially on slower connections.
FFmpeg re-encodes the 3G2 video to VP9 using the libvpx-vp9 encoder with CRF-based quality targeting (CRF 30-35 for low-resolution content). Audio is transcoded to Opus at 128 kbps (preferred) or Vorbis at quality 5. The WebM container (Matroska subset) uses cue points for efficient seeking. VP9 encoding is slower than H.264 but produces smaller files at equivalent quality. The '-deadline good' flag balances encoding speed and compression.
VP9 is slightly more efficient than H.264 at low bitrates, which means WebM files can be marginally smaller at the same visual quality. For 3G2 source material at 176x144 or 352x288, both codecs produce near-identical results since the source detail is extremely limited. Opus audio at 128 kbps is excellent quality for all content types.
| Device | 3G2 | WebM |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Native | Native |
| Linux | Partial | Native |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
Converting 3G2 to WebM produces the ideal format for web-based video delivery. VP9's compression efficiency and universal browser support make WebM the natural choice for embedding old phone recordings on websites and web applications.
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Funguje všude
| Native |
8MB free, 50MB Nitro
Jakýkoli prohlížeč, jakékoli zařízení
| Vlastnost | 3G2 | WebM |
|---|---|---|
| Celý název | 3GPP2 Multimedia | WebM Video |
| Přípona | .3g2 | .webm |
| Nejlepší pro | Mobile optimized | Web optimized |