DivX to 3GP Converter

DivX to 3GP Converter

DivX is a video codec — MPEG-4 Part 2 in its Advanced Simple Profile form (ISO/IEC 14496-2) — and the files people still have are almost always early-2000s AVI-era rips. 3GP is something different: the 3GPP file format, a stripped-down relative of MP4 standardized in 3GPP TS 26.244 and built for MMS and streaming to 3G-era handsets. This conversion exists for one honest reason — you are feeding a genuinely old device that lists .3gp and nothing newer. If your target is a phone, tablet, or computer from the last decade, DivX to MP4 is the better conversion: similar file sizes, far more detail retained, and native playback almost everywhere.

DivX Format at a Glance

3GP Format at a Glance

How to Convert DivX to 3GP

1. Upload Your DivX File: Drag and drop your .divx file onto the page, or click "Add Files" to browse. Batch is supported — queue several clips and each converts with the same settings.
2. Set the Quality Preset or File Compression Mode: The output is already fixed to 3GP. File Compression defaults to Quality Preset at "Very High (Recommended)"; step down to Medium, Low, or Lowest for a smaller file, or switch to "Specific file size" and enter a hard cap in kilobytes. Target file size (%), Constant Bitrate, Variable Bitrate, Constant Quality (CRF), and Constraint Quality are there too.
3. Downscale to a Handset Resolution (Optional): Under Video resolution, pick a small Preset Resolution (360p, 240p, or 144p), or choose Width x Height and enter 176 x 144 for QCIF or 352 x 288 for CIF — the frame sizes the 3GP era was built around. Under Trim, choose Time Range and set a start time and duration to export just a segment.
4. Convert and Download: Click Convert and save your 3GP file. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark.

What the 3GP Output Actually Contains

DivX and 3GP both touch MPEG-4 Part 2, which makes it tempting to assume the video stream could simply be re-wrapped into the new container. It cannot. DivX encodes at MPEG-4 Visual Advanced Simple Profile, while 3GPP's terminal requirements for MMS and streaming are written around MPEG-4 Visual Simple Profile and H.263 — the ASP coding tools a DivX encoder relies on, such as B-frames and quarter-pixel motion, are exactly what those handset decoders never implemented. So this page decodes and re-encodes the video rather than copying it across. These are the streams it can produce:

H.264 was added to 3GP by later revisions of the specification, so an H.264 3GP plays on 3G-era and newer handsets but not on the oldest ones. The original baseline — H.263 or MPEG-4 Simple Profile video with AMR narrowband audio — is the safest pairing when you do not know exactly what the target device supports. This page accepts .divx files; if your rip is a DivX-encoded .avi instead, the AVI to 3GP converter takes the same footage and produces the same result.

Frequently Asked Questions

Why is converting DivX to 3GP always a re-encode, and how much quality does that cost?

Because the profiles do not line up. Your DivX video is MPEG-4 Part 2 Advanced Simple Profile, and the 3GP profiles a handset understands are specified against MPEG-4 Visual Simple Profile, H.263, and — in later revisions — H.264. The stream therefore has to be decoded and encoded again rather than copied into the new container, which adds one generation of lossy compression on top of whatever the original rip already lost. Because 3GP exists to be small, you will usually downscale as well, so expect a visibly softer picture. That trade-off is the entire point of the format; if you do not specifically need 3GP, you keep far more detail by targeting MP4.

What video and audio codecs does the 3GP output use?

TS 26.244 lets a 3GP file carry H.263, MPEG-4 Visual, or H.264/AVC video (H.265/HEVC in later releases) alongside AMR narrowband, AMR wideband, Extended AMR-WB, MPEG-4 AAC, or Enhanced aacPlus audio. This page defaults to H.264 video with AMR Narrow Band audio — the pairing most 3G-era and newer handsets decode. Under Advanced Options you can set the Video Codec to H.263 or MPEG-4 for an older device, and the Audio Codec to AAC if the clip is music rather than speech. AMR-NB is a mono narrowband speech codec, so music routed through it sounds thin by design.

My old phone still won't play the converted 3GP file — what else could be wrong?

Three things beyond the codec. First, frame size: many handsets only decode up to QCIF (176 × 144) or CIF (352 × 288), so a 480p 3GP gets rejected even with the right codecs — set Width x Height explicitly rather than leaving the resolution alone. Second, the video codec itself: a decoder from before the H.264 era will not touch an H.264 stream, so try H.263 with AMR Narrow Band. Third, file branding: every 3GP declares a list of compatible brands (3gp4 through 3gp9, one per specification release) in its header, and an old reader is designed to skip a file that does not list a brand it recognizes — which is why a technically valid modern 3GP can still be refused outright by a very old phone.

How small will the 3GP file be, and can I get it under an MMS limit?

Size follows frame size, clip length, and bitrate far more than it follows the container. In our testing, resolution is the lever that actually matters: taking a 480p DivX clip down to QCIF (176 × 144) shrinks the output far more than moving the Quality Preset from Very High to Low at the same frame size. For an MMS-bound clip, combine all three — Trim to a Time Range of a few seconds, set Width x Height to 176 x 144, and drop the preset — or switch File Compression to "Specific file size" and enter a cap in kilobytes so the encoder tunes the bitrate to hit it. MMS size limits are set by the carrier and vary widely, so check your provider's limit if the message still will not send.

Should I convert my DivX file to 3GP or to MP4?

Pick 3GP only when a specific device or gateway demands it: an old feature phone, a 2000s car head unit, or an MMS pipeline that accepts nothing else. For everything else, DivX to MP4 is the better conversion — H.264 in MP4 is decoded in hardware on essentially every phone, browser, smart TV, and console made since around 2010, it is far more efficient than the MPEG-4 ASP codec inside your DivX file, and it does not push you down to a phone-era resolution. 3GP is a compatibility format for hardware that has been out of production for well over a decade.

What is the difference between 3GP and 3G2 for an old phone?

Both are built on the ISO base media file format and look nearly identical inside, but they come from different bodies for different networks: .3gp is 3GPP's format for GSM/UMTS handsets, while .3g2 comes from 3GPP2 for the older CDMA lineage and permits a slightly different set of audio codecs. If the phone you are targeting was sold on a CDMA carrier, use DivX to 3G2 instead — a handset expecting 3G2 can refuse a 3GP file even when the codecs inside it are identical.

Will subtitles or extra audio tracks from a .divx file survive the conversion?

No. The DivX Media Format container was designed to hold multiple audio tracks, chapters, and subtitles, whereas the 3GP profiles an old handset understands are built around a single video track plus a single audio track. The conversion keeps the video and one audio stream and drops the rest. If those extra tracks matter, send the file somewhere that keeps them — DivX to MKV targets Matroska, which Plex, Jellyfin, VLC, and MPV all read with multiple audio and soft subtitle tracks intact — and treat the 3GP as a separate, disposable copy for the phone.

Are my files private during conversion?

Yes. Files are uploaded over an encrypted (TLS) connection, processed on our servers, and deleted automatically a few hours after the job finishes — there is no sign-up, no watermark, and files are never shared or made public. There is no fixed per-file cap; because the conversion runs server-side, the practical limit is your upload size and connection speed, so full-length DivX rips are routine even though the 3GP that comes back out is a fraction of the size.