DRW File Documentation

Summary

A DRW file is a vector drawing, most often from the old Micrografx Designer program (which Corel acquired and continued as Corel DESIGNER). It stores shapes, paths and text that scale without losing quality. The catch is that .drw is a generic extension reused by several unrelated programs, each with its own internal layout, so there is no single DRW format and no reliable magic number. The first step is always to find out which program created your file.

Technical details

FeatureValue
Full nameMicrografx Designer / Corel DESIGNER Drawing (dominant meaning)
File extension.drw
MIME typeimage/x-drw (unofficial)
Format typeProprietary vector graphics drawing (legacy)
DeveloperMicrografx (later Corel Corporation)
IntroducedLate 1980s (Micrografx Designer for Windows)
Open standardNo
Magic numberNone reliable — varies by producing program
Also used byPro/ENGINEER (Creo) CAD drawing; AppleWorks / MacDraw; other apps
Contents (illustration)Paths, shapes, text, fills, colours; sometimes placed bitmaps
Faithful opener (Micrografx)Corel DESIGNER (CorelDRAW Technical Suite)
Opener (CAD variant)PTC Creo
Related extensions.cdr, .des, .ai, .eps, .dxf, .wmf
Identification tipCheck the source app, or use a detector such as TrID

What is a DRW file?

.drw, short simply for “drawing”, is a generic vector-graphics extension that several unrelated programs have used over the decades. That is the single most important fact about it: there is no one “DRW format”, and a .drw file made by one program will usually not open in another. Unlike a format such as PNG or FLAC, the extension does not identify a defined byte structure, so it has no reliable magic number and no shared specification.

The most established meaning is a Micrografx Designer drawing. Micrografx Designer was a popular Windows vector-illustration program from the late 1980s and 1990s used for technical illustration, diagrams and print graphics. Corel Corporation acquired Micrografx in 2001 and folded Designer into its own line as Corel DESIGNER, which can still open the old .drw files. These store vector artwork: paths, shapes, text, fills and colours, all resolution-independent so they scale without quality loss.

The multiple meanings behind one extension

The same three letters are claimed by very different applications, which is why identifying the source program matters before anything else.

  • Micrografx Designer / Corel DESIGNER — the dominant illustration meaning, a proprietary Windows vector format now handled by Corel DESIGNER.
  • Pro/ENGINEER (PTC Creo) — a completely separate 2D/3D engineering drawing file that only Creo and other PTC tools read. It has nothing to do with illustration vector graphics.
  • AppleWorks / ClarisWorks / MacDraw — vector drawings from the classic Macintosh apps, needing legacy Mac software or a conversion route.
  • Other design and CAD tools — various programs have saved their own unrelated vector data as .drw over the years.

Because these formats share only the extension and not the internals, opening a .drw is really a two-step problem: identify which program created it, then use that program or a matching importer. Where the file came from is the best clue. Illustration or diagram work points to Micrografx Designer or Corel DESIGNER; an engineering or CAD context points to Pro/ENGINEER (Creo); an old Mac document points to AppleWorks or MacDraw. A file-type detector such as TrID can help confirm the origin by inspecting the file’s actual byte patterns.

Why there is no single magic number

A file signature works only when every file of a type starts with the same bytes, which requires a shared format definition. .drw has none. The Micrografx and Corel DESIGNER drawings are proprietary binary with their own internal layout; a Pro/ENGINEER .drw uses PTC’s engineering-drawing structure; some other .drw files are tag-based or even text. There is no byte pattern common to all of them, so tools that identify files by signature cannot key on .drw alone and instead have to recognise each producing application’s format separately. That is also why a generic “DRW viewer” cannot reliably exist: it would have to implement several unrelated formats at once.

What a vector .drw holds

For the illustration variants, the drawing is made of vector objects rather than a grid of pixels. It stores paths, lines and curves; text as editable labels or artistic text (whose fonts may be missing when the file is opened on another machine); solid and gradient fills with stroke colours; and, depending on the producing application, a structure of layers or pages. Some drawings also embed placed raster images inside the vector artwork. The precise organisation of these elements is entirely program-specific, which is the whole reason cross-application opening tends to fail: another editor may recognise the geometry but not the app-specific styling, text handling or layer model.

Opening a .drw and getting a usable copy

For a Micrografx-lineage .drw, Corel DESIGNER (part of CorelDRAW Technical Suite) is the faithful opener, and a free trial exists. Some general vector editors, notably the free SVG-native Inkscape, can import simpler or older vector .drw files, though support is partial and fidelity depends on the source. For a Pro/ENGINEER-type CAD .drw, you need PTC Creo; a vector editor will not open it, and Creo will not open a Micrografx illustration.

Many .drw files are old enough that the original software is gone, so the most practical route for a non-specialist is to obtain an export from whoever still has the source application. The reliable targets are PDF (best for viewing and print, preserving vector quality without the original app), SVG (for reuse in modern vector editors), and EPS (for print and prepress). For a CAD-origin .drw, the correct interchange targets are DXF or DWG instead, exported from Creo; those carry the geometry, though app-specific styling may not survive. A flat raster export to JPG is the fallback when you only need to look at the drawing.

Frequently asked questions

Why won’t my DRW file open?

Almost always because the program you are using did not create it. A Micrografx .drw will not open in Creo, and a Creo CAD .drw will not open in a vector editor, because they are different formats that share only the extension. The original software may also be discontinued. Identify the source application, or ask the sender for an exported PDF, SVG or DXF.

Is DRW the same as CDR?

They are related but not the same. CDR is CorelDRAW’s native format, while .drw is the older Micrografx Designer format (now handled by Corel DESIGNER) and is also used by unrelated programs such as Pro/ENGINEER. They are distinct files with different internal structures.

How do I tell which program created my .drw?

Use the context and the bytes. Where the file came from is the strongest hint: illustration work suggests Micrografx/Corel DESIGNER, engineering work suggests Pro/ENGINEER (Creo), an old Mac document suggests AppleWorks or MacDraw. A file-type detector such as TrID inspects the file’s internal patterns and can often name the originating format.

References