WebM to 3G2 Converter

How to Convert WebM to 3G2 Online

1. Upload Your WebM File: Drag and drop or click "+ Add Files" to select WebM clips from your computer. Batch upload is supported, and processing runs in your browser session — no account, no watermark.
2. Pick a Quality Preset or Target Bitrate: Default is "Very High (Recommended)". Open File Compression to switch between Quality Preset (Lowest → Highest), Specific file size, Constant Bitrate, Variable Bitrate, Constant Quality, or Constraint Quality. For real CDMA handsets keep the video bitrate in the 64–384 kbps range — that is what 3G2 was designed for.
3. Resize for a Small Screen (Optional): Use Preset Resolutions (176x144 QCIF, 320x240 QVGA, 352x288 CIF, 480x360) or Resolution Percentage to scale down. Keep aspect ratio with Width-only or Height-only inputs, or set an explicit Width x Height. Trim with a Time Range if you only need a clip.
4. Convert and Download: Click Convert. Each file is muxed into a 3G2 (3GPP2) container and offered for download as soon as it finishes.

Why Convert WebM to 3G2?

WebM is a royalty-free container Google released in 2010 to ship VP8/VP9 video and Vorbis/Opus audio inside HTML5 <video> tags. 3G2 is the 3GPP2 multimedia container that ships H.263, MPEG-4 Part 2, or H.264 video alongside CDMA-era voice codecs (EVRC, EVRC-B, QCELP/13K, AMR-NB, AAC-LC). Converting WebM to 3G2 is almost always about reaching a CDMA-generation device, MMS pipeline, or legacy archive that has not been re-encoded since the 2000s.

• Playback on CDMA-era handsets — Verizon's 3G CDMA network ran until December 31, 2022 and Sprint's (under T-Mobile) finished its phased shutdown by May 31, 2022. Phones manufactured for those networks still exist as offline test rigs, museum pieces, and embedded display devices that only accept 3G2.
• Legacy MMS gateways and SMSC test harnesses — Carrier-side message-store and gateway simulators still validate 3GPP2 container parsing; QA teams need 3G2 fixtures, not WebM, to exercise those code paths.
• Embedded automotive and industrial firmware — In-vehicle infotainment units and industrial HMIs from the CDMA2000 era ship a 3GPP2 decoder but no VP8/VP9 support. A 3G2 build is the only file the unit will mux.
• Forensic and archival compatibility — Evidence pulled from a CDMA flip phone is delivered as 3G2; investigators converting a modern WebM exhibit to match formats keep the chain-of-custody container consistent.
• Bandwidth-starved playback tests — 3G2's design budget assumed sub-100 kbps mobile links, which is useful when you need a working video that will load on a throttled or satellite connection.
• Re-uploading to legacy CMSs — Older learning management systems and intranet portals built around 3GPP/3GPP2 uploaders reject WebM by MIME type but accept video/3gpp2.

WebM vs 3G2 — Format Comparison

Codec & Bitrate Quick Guide for 3G2 Output

If you only need GSM-network playback rather than CDMA, Convert WebM to 3GP instead — 3GP keeps the same H.263/H.264 video options but pairs them with AMR-WB and HE-AAC v2 audio that 3G2 does not support. For modern playback skip the legacy container entirely with Convert WebM to MP4, and if you need to slim a WebM before converting use Compress WebM first.

Frequently Asked Questions

Why would I still need a 3G2 file in 2026?

The format isn't dead — it's narrow. Three live use cases remain: (1) decoding device QA at carriers that still ship 3GPP2-conformant firmware, (2) handset museums and recovery labs that need playable evidence on real CDMA hardware, and (3) MMS-style gateway tests where the container MIME (video/3gpp2) must match what a legacy SMSC expects. For everyday phone playback in 2026 use MP4.

What video codec should I pick — H.263, MPEG-4, or H.264?

H.264 baseline produces the best-looking 3G2 if the target device is a CDMA smartphone (Android 2.x, BlackBerry, late Windows Mobile). H.263 is the widest-compatible codec for true feature phones — it was the original mandatory 3GPP2 codec. MPEG-4 Part 2 sits between them and is rare in practice. Stick to H.264 baseline profile, level 1.3 or below, to stay within decoder limits on most 3G2 devices.

Why are my converted 3G2 files so much smaller than the WebM?

3G2's design budget assumed 64–384 kbps CDMA links and screens up to roughly 480x360. When the converter drops bitrate and resolution to those targets the file shrinks 10–50×. That's expected — a 1080p WebM contains 6–8× more pixels per frame than QVGA and runs at a much higher bitrate. The output is not corrupted; it is correctly scaled for the format's target hardware.

Will my 3G2 play in a regular web browser?

No. Browsers do not natively decode 3GPP2 containers — even Safari, which has the deepest legacy ISO-BMFF support, won't play video/3gpp2 without a plug-in. Use VLC (desktop), MX Player or VLC for Android, or QuickTime 7 with the 3GPP component on macOS. If the goal is browser playback, convert to MP4 instead.

Can I keep VP9 or AV1 video inside a 3G2?

No. The 3G2 specification only permits H.263, MPEG-4 Part 2, and H.264/AVC video. VP9 and AV1 must be transcoded — the conversion is not a remux. Plan for a full re-encode (and the visual quality loss that comes with the lower bitrate).

What audio codec should I choose for CDMA-handset playback?

For real CDMA devices use AMR-NB (12.2 kbps) — it is the most widely implemented voice codec across both 3GPP and 3GPP2 hardware. QCELP/13K and EVRC are CDMA-native but rare in non-Qualcomm decoders. AAC-LC at 64 kbps works on most CDMA smartphones and gives noticeably better music quality than the voice codecs.

Is there a file-size or count limit?

No hard cap. Processing happens in your browser session, so the practical ceiling is your device's RAM and how long you're willing to wait — a few hundred MB of source WebM is comfortable on a modern laptop. Batch as many files as you want; each runs sequentially and downloads as it finishes.

Does xconvert keep my files after conversion?

No. Files stay on your device through the conversion and are not uploaded to a long-term store. No sign-up is required and no watermark is added to the output.

Why does the converted file sometimes say .3gp2 or .3gpp2 instead of .3g2?

All three are the registered extensions for the 3GPP2 format (per the Wikipedia 3GP and 3G2 spec summary). xconvert writes .3g2 by default because it is the shortest and most widely recognized; if a target system insists on .3gp2 or .3gpp2, rename the file — the bytes inside are identical.