What is the DIR file format?
.DIR is a project file associated with Adobe Director, a multimedia authoring tool originally developed by Macromedia. .dir files can contain animations, video clips, or website elements. Each .dir file stores references to project resources, Lingo script code, and the animation timeline. Since February 2017, Adobe Director has been discontinued, and the format is not fully backward-compatible across major versions - Director 4 movies use the MV93 internal codec tag, while later releases use distinct identifiers.
Internally, .dir uses a RIFX container (a big-endian variant of RIFF) with typed chunks covering the score, cast members, bitmaps, audio, and scripts. The protected distribution variant is .dxr; the browser-deliverable Shockwave web format is .dcr.
The Shockwave Player browser plug-in - which allowed Director content to run in web browsers - was officially discontinued in December 2019. Adobe was forced to abandon the plug-in ecosystem due to legacy bugs and security holes that affected end-users, the same pressures that ended Adobe Flash Player on December 31, 2020. This means .dir files and Director-based interactive content are no longer officially supported on any current platform. Director 12 does not run on macOS Catalina or later, and has no supported path on modern Windows versions.
Security & safety
RISK: MEDIUMDirector files can contain Lingo scripts with file system access, shell commands and network calls. Malicious .dir files are theoretically possible but rare in the wild (the format is obsolete). Main concern today: running EOL software (Director itself is unpatched since 2017) to open unknown .dir files carries OS-level risk.
Format details
in a nutshell- Directory listing file (various systems) - Some CLI tools and legacy systems save directory listings as .dir text files; completely unrelated to Director.
- Mac OS resource fork / folder descriptor (legacy) - On very old Mac systems .dir indicated a folder descriptor; obsolete.
Programs that open DIR files
Windows1 app
Adobe Director 12 (legacy)
Paid File > Open; requires Director 12 installed (EOL 2017, Windows 10 compatibility mode may work). Last retail version. 
macOS1 app
Adobe Director 12 (legacy, Intel Mac only)
Paid Runs on macOS up to 10.14 Mojave (32-bit app); does NOT run on macOS 10.15 Catalina or later. Technical details
deep spec| Container format | RIFX (big-endian variant of RIFF - Resource Interchange File Format) |
| Byte order | Big-endian (RIFX); little-endian variant begins with XFIR |
| Internal version tag | FourCC in bytes 8-11: MV93 = Director 4, MV95 = Director 5, MV1000 = Director 10 |
| Scripting language | Lingo (Director proprietary); later versions also support JavaScript syntax |
| Compression | None at container level; individual bitmap and audio chunks may use internal compression |
| Copy protection | Read-only distribution variant: .dxr (encrypted/compiled movie); .cxt for protected cast libraries |
| Typical file size | 500 KB - 100 MB depending on embedded media |
| Stage dimensions | Up to 8,192 × 8,192 px (Director 12); 640 × 480 px historically common |
| Embedded bitmap color depth | 1-32 bpp |
| Embedded audio | 8,000-44,100 Hz, 8/16-bit, mono or stereo |
| MIME type | application/x-director |
| Memory map capacity | Up to 65,535 chunks indexed in the mmap chunk |
| Platform support | Windows; macOS Classic and OS X through 10.14 (Mojave); no support on macOS 10.15 Catalina or later |
| Superseded by | HTML5/CSS/JavaScript (web interactivity); Unity (games); Adobe Animate (animation) |
| Released | 1985 (MacroMind VideoWorks, precursor to Director) |
| Latest version | Adobe Director 12 / MX 2004 (Director 10); Adobe stopped sales 2017 |
| Specification | nosamu.medium.com |
DIR conversions
Community Q&A
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