Opening a DWG file without AutoCAD
You have no licence but you need to read the drawing. The options, what each is good for, and where each falls short.
DWG is Autodesk's own file format, so the first obstacle for a contractor, a client or a project manager holding a drawing is the licence. In most cases, though, what is needed is not drawing but reading: checking a dimension, looking at a detail, printing one part of a sheet.
The options
| Route | Good for | Where it stops |
|---|---|---|
| Free desktop viewers | Frequent use, works offline | Needs installing, version support varies, often blocked on managed machines |
| AutoCAD web / mobile | Natural if you already have an Autodesk account | Requires an account and a subscription for most of it |
| Online viewers | Fastest for a one-off look | Most convert to an image; scale, layers and text are lost |
| Asking the sender for a PDF | Needs no tool at all | You wait, and the PDF you get may have no usable scale |
What to watch for in an online viewer
Most tools that come up under "online DWG viewer" render the file to a picture on their server and show you the picture. That is fine for a look, but three things go with it:
- Scale. You cannot measure on an image, and any measurement you take does not correspond to the real distance.
- Layers. On a busy project, being unable to switch off services and furniture makes the plan unreadable.
- Text. Labels baked into an image cannot be searched or copied, and non-Latin characters are frequently mangled.
How we do it
DWGtoPDF does not render the drawing to a picture. It reads the file, extracts the geometry and draws it in your browser on your GPU. That means you can toggle layers, measure between two points, leave notes on the plan, and export a vector PDF at the scale you choose — with nothing installed.
And if you do need to draw?
To be clear: this is not a CAD editor. If you need to move a wall, insert a block or edit the drawing and save it back, you need real CAD software. If the job is to read, measure, share and print, a browser is more than enough.
Try it with your own drawing
Drop a DWG or DXF and take away a true-scale vector PDF. Nothing to install.
Related reading
How to convert a DWG file to PDF properly
Turning a drawing into a PDF is easy. Doing it without losing the scale, the colours and the hatches is not. Step by step.
DWG vs DXF: what differs and which one to send
Both are drawing files, but they are not the same thing. One is binary, the other readable text — and that difference sometimes saves a project.
1:50, 1:100 — how to export a PDF at true scale
A scaled export is one you can measure with a ruler. What scale means, which to use when, and why it sometimes comes out wrong.