MP4 to 3G2 Converter
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Supports: MP4, M4V
Advanced Options - Our defaults are optimized for the best results. We recommend you keeping the defaults unless you have a specific need.
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Need help?How to Convert MP4 to 3G2
- Upload Your MP4 File — Click "Choose Files" or drag and drop your MP4 or M4V video file. Both extensions are accepted.
- Choose Video Codec — Under Video Codec, the default for 3G2 output is H.264. H.263 is also available for maximum legacy compatibility.
- Set Video Quality — Under File Compression, choose from: Quality Preset (Highest through Lowest), Target File Size % (1-100% slider with Smart Scaling), Specific File Size (MB/KB), Constant Bitrate, Variable Bitrate, Constant Quality (CRF), or Constraint Quality.
- Set Audio Codec — Under Audio Codec, the default for 3G2 is AMR (Adaptive Multi-Rate).
- Adjust Resolution (Optional) — Under Video Resolution, keep the original or choose Preset Resolutions (480p, 360p, 240p, etc.) or custom dimensions. 3G2 is designed for small screens.
- Trim (Optional) — Under Trim, set a Start Time and Duration to extract a specific segment.
- Convert & Download — Click "Convert" and download your 3G2 file.
Why Convert MP4 to 3G2?
3G2 (3GPP2) is a mobile video format designed for CDMA2000 networks — the standard used by carriers like Verizon and Sprint in the US. Both MP4 and 3G2 are based on the MPEG-4 Part 12 container, but 3G2 was optimized for bandwidth-constrained mobile networks. Converting MP4 to 3G2 is useful for sending video via MMS on legacy CDMA phones, maintaining compatibility with older Verizon/Sprint feature phones, creating small video files for low-bandwidth mobile delivery, and preparing video for legacy systems that specifically require 3G2 input.
MP4 vs 3G2 Comparison
| Feature | MP4 | 3G2 (3GPP2) |
|---|---|---|
| Developer | MPEG | 3GPP2 (CDMA consortium) |
| Video codec | H.264 (typical) | H.264 (default), H.263 |
| Audio codec | AAC (typical) | AMR (default) |
| Network | Universal | CDMA2000 (Verizon, Sprint) |
| Max resolution | Unlimited | Typically 320×240 or 640×480 |
| File size | Varies | Very small |
| Best for | Modern playback | Legacy CDMA phones, MMS |
Why is AMR the default audio codec?
AMR (Adaptive Multi-Rate) is the native audio codec for 3G2 — it was designed for voice on CDMA mobile networks. AMR produces very small files but is voice-optimized. Change to AAC under Audio Codec if you need better music quality.
What is the difference between 3G2 and 3GP?
3G2 is for CDMA networks (Verizon, Sprint), while 3GP is for GSM networks (AT&T, T-Mobile). Both are nearly identical containers. 3G2 additionally supports EVRC and QCELP audio codecs used in CDMA voice networks.
What resolution should I use?
3G2 is designed for mobile screens. Use 320×240 (QVGA) for feature phones or 640×480 for smartphones. Higher resolutions work but defeat the purpose of 3G2's small file size.
Can I trim the video during conversion?
Yes. Under Trim, select "Time Range" and enter a Start Time and Duration in seconds or HH:MM:SS.sss format.
Is 3G2 still relevant?
3G2 is a legacy format — modern smartphones use MP4. It is primarily useful for sending video to older CDMA feature phones, MMS with strict file size limits, and maintaining compatibility with legacy mobile systems.
Can I adjust the resolution during conversion?
Yes. Under Video Resolution, choose Preset Resolutions (480p, 360p, 240p), Fixed Resolutions, Resolution Percentage, or custom Width/Height/Width×Height. Lowering resolution significantly reduces file size — 240p or 360p is typical for 3G2 mobile video.