About DIVX Files
DivX Video
DivX is a video codec and container format based on MPEG-4 ASP that gained popularity in the early 2000s for compressing DVD-quality video to CD-size files. DivX-certified devices and players still support the format worldwide.
Family
Video Files
Extension
.divx
MIME Type
video/x-divx
Can Use As
HOW DIVX
CAME TO BE.
DivX began as a hacker project in 1999. Jérôme Rota — known online as "Gej" — reverse-engineered Microsoft’s MPEG-4 v3 codec and patched the binary so it could encode and decode video inside standard AVI containers instead of the restrictive ASF Microsoft required. The resulting "DivX ;-) 3.11 Alpha" spread virally on hacker sites and became the default codec of the 2000s DVD piracy scene: a 2-hour movie could be ripped to DVD quality in a 700 MB AVI that fit on a CD-R.
Rota and the early community eventually founded DivX Networks and went legitimate, releasing DivX 4 (2001) and later DivX 5 with the legal blessing of patent holders. A competing open-source fork, XviD ("DivX" reversed), kept the scene going with patent-free code. DivX today is a legitimate company selling transcoder products; the codec itself is mostly a historical curiosity, since H.264 and H.265 surpassed it by a wide margin.
CURIOSITIES &
TRIVIA.
DivX 3.11 Alpha (1999) was a patched Microsoft MPEG-4 v3 DLL — the single most consequential piece of video piracy in history.
The smiley in "DivX ;-)" was a nod to the fact that the codec was a hack of Microsoft's work.
XviD (DivX spelled backwards) is the open-source, patent-free fork that kept the same file format but cleaner code.
A 700 MB DivX-encoded AVI could hold a 2-hour movie at VHS-to-DVD quality — the CD-R file size sweet spot for early piracy.
DivX Certified DVD players were a brief but real consumer category in the mid-2000s — they played burned AVIs off discs.
STRENGTHS &
LIMITATIONS.
Strengths
- Massively efficient for the early-2000s era — 700 MB for a full movie was revolutionary.
- Universal desktop playback via Windows Media Player + DivX codec pack.
- Spawned a hardware ecosystem — DivX-certified DVD players.
- Open-source fork XviD keeps the format alive.
Limitations
- Patent-encumbered (MPEG-4 Part 2 patents).
- Obsolete — H.264 and HEVC compress 2-3× better.
- Quality degrades noticeably on fast-motion scenes.
- Tied to the aging AVI container and its 4 GB file size limit.
Typical Sizes & Weights
90-min movie (700 MB DivX target)
~700 MB
45-min TV episode (DivX rip)
350-500 MB
Technical Specifications
- MIME type
- video/x-divx
- Extensions
- .avi (container), .divx (branded)
- Codec
- MPEG-4 Part 2 Advanced Simple Profile
- Typical container
- AVI
- Open-source fork
- XviD (patent-free)
CONVERT FROM
DIVX
Common Use Cases
DVD backup, compressed video sharing, DivX-certified devices
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Frequently Asked Questions about DIVX
Frequently Asked Questions
DIVX (DivX Video) is a video container format that bundles one or more video streams, audio tracks, and optional subtitles into a single file. The container format determines how metadata is organised and which codecs can live inside; the visual quality itself depends on the codec (H.264, H.265, VP9, AV1) rather than the DIVX wrapper. It is part of the video files family.
VLC, MPV and PotPlayer play nearly every DIVX file on desktop. Browser support varies: modern Chromium, Firefox and Safari play common containers via the HTML5 <video> tag, but niche DIVX variants may fail. If a device refuses your DIVX, convert to MP4 with our DIVX to MP4 converter for universal playback.
Upload your DIVX to KaijuConverter and pick MP4, MOV, MKV, WebM, or any other target. Our pipeline uses FFmpeg under the hood and stream-copies when codecs are compatible (no quality loss) or transcodes at high-quality defaults otherwise. Conversion runs server-side; both files delete within two hours.
Only when the target requires re-encoding. If the codecs inside DIVX match what the target container supports, FFmpeg stream-copies the streams and the output is bit-identical to the source. Transcoding uses transparent quality defaults (CRF 20–23 H.264) and produces output indistinguishable from the original at normal viewing distance.