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Supports: GIF
This tool turns an animated (or static) GIF into a 3G2 video — the tiny container 3GPP2 built for CDMA2000 mobile phones. 3G2 is the CDMA twin of 3GP: same ISO base-media design, but tuned for a network family that has largely shut down (Verizon retired its 3G CDMA network on December 31, 2022). So pick 3G2 in exactly one case — a very old CDMA-era handset or a player/system that specifically demands a .3g2 file. For every modern use — web, a current phone, social, messaging — GIF to MP4 is the right target: the same animation, broad playback, and none of 3G2's tiny-screen limits.
| Property | GIF (source) | 3G2 (3GPP2 / CDMA) | MP4 (H.264) |
|---|---|---|---|
| Defined by | CompuServe, GIF89a (1987) | 3GPP2, for CDMA2000 services | ISO/IEC 14496-14 (MPEG-4 Part 14) |
| Built for | Looping web images | 3G CDMA feature phones | General-purpose video, everywhere |
| Underlying structure | GIF | ISO base media (ISO/IEC 14496-12) | ISO base media (ISO/IEC 14496-12) |
| Video codecs | n/a (frames + palette) | H.263, MPEG-4 Part 2, H.264 | Usually H.264 / H.265 |
| Colors per frame | 256 (palettised) | ~16.7M (8-bit YUV) | ~16.7M (8-bit YUV) |
| Typical resolution | Whatever the GIF is | Small — often downscaled | Up to 4K and beyond |
| Inter-frame compression | None (each frame whole) | Yes (I/P/B frames) | Yes (I/P/B frames) |
| Audio from a GIF source | None (GIF has no audio) | None — output is silent | None — output is silent |
| Plays in modern browsers | Yes, in <img> |
No native browser support | Yes, ~96%+ via <video> |
| Network family | n/a | CDMA2000 (3GPP2) | n/a — universal |
The headline: 3G2 and MP4 are distant cousins — both sit on the ISO base media file format (ISO/IEC 14496-12), and 3G2 can carry the same H.264 video MP4 uses. The difference is intent. 3G2 was tuned for the storage and bandwidth limits of CDMA phones, so it leans toward small resolutions and codecs old handsets can decode. MP4 makes none of those compromises and plays nearly everywhere. The only reason to choose 3G2 today is a device or system that won't accept anything else.
.3g2 clips..3g2 extension and rejects modern formats.<video autoplay loop muted playsinline> — 3G2 won't play natively in a browser.It keeps its motion. We read every frame of the animated GIF and encode them in order as a true 3G2 video, so a looping GIF becomes a playable clip of the same length — not a single held frame. The per-frame "Image Duration" and merge controls you may see on other image-to-video tools are hidden for GIF input precisely because the GIF already carries its own frame timing, and we use that timing directly. A single static GIF simply produces a short still clip.
No. GIF has no audio stream at all, so there is nothing to carry over — the resulting 3G2 is silent by nature, not muted. The 3G2 container itself can hold audio (AMR and AAC, plus CDMA-specific codecs like EVRC and QCELP), but with a GIF source there is no track to encode. If you need narration or music, add an audio track afterwards in a video editor.
They are sibling formats from different standards bodies for different mobile networks. 3GP (.3gp) is defined by 3GPP for GSM/UMTS phones; 3G2 (.3g2) is defined by 3GPP2 for CDMA2000 phones. Both are structurally based on the same ISO base media file format (ISO/IEC 14496-12) that underpins MP4, and both carry H.263, MPEG-4 Part 2, and H.264 video. The practical difference is the target device's network and the CDMA-specific audio codecs (EVRC, QCELP/13K, SMV, VMR-WB) that 3G2 adds. If your handset is GSM-era, convert to GIF to 3GP instead.
Because 3G2 was built for the small screens and slow networks of CDMA phones, so the format and the devices that expect it lean toward low resolutions. If your target device or player only accepts small frames, downscaling is the point. If you'd rather keep the GIF's original dimensions, set Resolution to "Keep original" here, or convert to MP4 instead — MP4 has no such small-screen expectation and preserves full resolution comfortably.
For most people, no. The CDMA2000 networks 3G2 was built for have largely been retired — Verizon shut off its 3G CDMA network on December 31, 2022, and other CDMA carriers have done the same. 3G2 stays useful only for an old CDMA-era handset, a legacy player, or software that specifically requires a .3g2 file. For anything browser- or phone-bound today, convert to GIF to MP4; H.264 MP4 has roughly 96%+ browser support and plays inline on current iOS and Android.
No — the output can match the source but never exceed it. The GIF you upload is already limited to 256 colors per frame and whatever resolution and frame rate it was saved at. The 3G2's H.264 stream can hold far more color than that, so it won't add banding, but it can't invent detail the GIF never captured. Upscaling the resolution just enlarges existing pixels; it doesn't recover lost color or sharpness. The 256-color GIF source is your real quality ceiling. In our testing, a short 480p animated GIF converted to a downscaled 3G2 clip only a few hundred kilobytes in size — far smaller than the GIF, because 3G2 adds the inter-frame compression GIF completely lacks.
Yes. Use 3G2 to MP4 to re-wrap a 3G2 clip into a modern, web-friendly MP4. Note that re-encoding from an already-downscaled 3G2 can't recover resolution or quality lost in the first pass — so if you still have the original GIF, converting that straight to MP4 gives a cleaner result than a GIF-to-3G2-to-MP4 round trip.