DivX to MP4 Converter

Convert DivX to MP4 Online

DivX video is encoded with the MPEG-4 Part 2 (Advanced Simple Profile) codec — the same early-2000s standard behind Xvid — which most phones, browsers, smart TVs, and modern editors no longer decode without a dedicated DivX player or codec pack. This is the flagship rescue path for old AVI-era rips: it re-encodes your DivX file to an MP4 with H.264 video and AAC audio, the combination that plays natively almost everywhere, so a clip stuck on legacy hardware works again on an iPhone, Android, the web, or in any current editor.

How to Convert DivX to MP4

1. Upload Your DivX File: Drag and drop your .divx file (or a DivX-encoded .avi) onto the page, or click "Add Files" to browse. Batch is supported — queue several rips and each converts with the same settings.
2. Pick a Quality Preset or File Compression Mode: The output is already set to MP4. Leave the Quality Preset on "Very High (Recommended)" for an H.264 file that mirrors the source, or open File Compression to choose "Specific file size" (hit an exact MB target), "Constant Bitrate", "Variable Bitrate", "Constant Quality" (CRF), or "Constraint Quality".
3. Resize, Trim, or Change Codec (Optional): Under Video resolution, keep original, pick a Preset Resolution, scale by Resolution Percentage, or enter a custom Width × Height. Under Trim, choose "Time Range" for a segment. Under "Show All Options" you can switch the Video Codec from H.264 to H.265 for a smaller file, or change the Audio Codec (AAC by default).
4. Convert and Download: Click Convert and save your MP4. No sign-up, no watermark.

DivX vs MP4: What the Conversion Changes

DivX and MP4 sit on different layers — one is mainly a codec, the other mainly a container — so the conversion is a genuine re-encode, not a rewrap. Here is what actually changes:

Which Output Setting Should You Use?

The default Quality Preset covers most conversions, but the File Compression modes let you trade size against quality precisely. Pick by what you're optimizing for:

Frequently Asked Questions

Will converting DivX to MP4 lose video quality?

It is a genuine re-encode — DivX (MPEG-4 Part 2 ASP) and H.264 are different codecs, so the video stream is re-encoded rather than copied across, and some loss is technically unavoidable. In practice it is negligible: H.264 is far more efficient than MPEG-4 Part 2, so at the default "Very High" preset (or Constant Quality around CRF 18-20) the output is visually hard to tell from the source. The bigger quality factor is the original rip itself — converting can't add back detail the source already lost.

My DivX file is actually an .avi — can I still convert it?

Yes. DivX is most commonly carried inside an AVI container, so an .avi that uses the DivX codec converts exactly the same way and produces an identical MP4. If your file's extension is .avi, the dedicated AVI to MP4 converter accepts the same DivX-encoded footage — it auto-detects the codec inside the container.

Why won't my DivX file play on my phone or in a browser?

Phones and browsers ship with native H.264 (and increasingly H.265) decoders but generally do not include an MPEG-4 Part 2 / DivX decoder. That is why a DivX clip needs a DivX-branded player or a codec pack on the desktop and often fails silently on mobile or in a browser tab. Re-encoding to H.264 MP4 removes that dependency, because H.264 is decoded in hardware on essentially every device made since around 2010.

Is DivX the same as MP4, or is it a codec inside a container?

They are different layers. DivX is primarily a video codec (MPEG-4 Part 2 ASP), historically stored in AVI files and later in the DivX Media Format that uses the .divx extension. MP4 is a container that here holds H.264 video and AAC audio. Converting moves your footage from the older DivX codec into the newer, far more widely supported H.264-in-MP4 combination.

Can I shrink the MP4 to fit an upload or email limit?

Yes. Open File Compression, switch to "Specific file size", and enter a target in MB — the encoder tunes the bitrate to hit it. Choosing H.265 as the Video Codec shrinks it further at comparable quality. If your goal is purely a smaller file rather than a format change, the Video Compressor targets a size or percentage directly and accepts DivX input. In our testing, a 700 MB DivX movie rip re-encoded to H.264 MP4 at CRF 20 landed around 450-550 MB with no visible quality drop.

How do I keep subtitles or multiple audio tracks from a DivX file?

The DivX Media Format container can hold several audio and subtitle tracks, and the way to preserve them is to convert into a container that also supports them. MKV is the best target: DivX to MKV re-wraps the streams into Matroska, which Plex, Jellyfin, VLC, and MPV all read with soft subtitles intact. A plain MP4 can carry multiple tracks too, but MKV is the more forgiving home for multi-language libraries.

Is DivX still under patent, or is it royalty-free now?

The underlying MPEG-4 Part 2 standard is now royalty-free everywhere: the last patent in the MPEG-4 Visual pool expired on July 19, 2026, so encoding and decoding DivX (or its open-source cousin Xvid) no longer requires a license. That does not change playback compatibility, though — patents expiring doesn't add a DivX decoder to your phone or browser. If a device won't open the file, the fix is still to convert it to H.264 MP4.

Is DivX the same as the old Circuit City DIVX rental discs?

No — they just share a name. The video codec is DivX from DivX, LLC (San Diego), which began in 1998 as "DivX ;-) 3.11" and shipped as the official DivX 4.0 codec in 2001. The all-caps "DIVX" that people sometimes remember was Circuit City's discontinued pay-per-view rental-disc system from the late 1990s, which is entirely unrelated to the video codec your .divx file uses.

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 — no sign-up, no watermark, and they are never shared or made public. There's no fixed per-file cap; because conversion runs server-side, the practical limit is your upload size and connection speed, so large DivX movie rips are routine.