Linework
Stays on this device

Open a CAD drawing

View, measure and mark up DXF and DGN v7 drawings in your browser.

or drag a file anywhere onto this window

Your files never leave this device. Nothing is uploaded — the drawing is read inside this browser tab, and it keeps working offline.

No file handy? Try a sample

Opens DXF (ASCII, R12 to 2018) and DGN v7. DWG support is coming — export to DXF for now.

Help & keyboard shortcuts

Get around

Drag
Pan (Pan tool) — middle mouse or Space+drag always pans
Wheel / pinch
Zoom at the cursor
F
Fit the whole drawing
Z
Zoom to a box
+ −
Zoom in / out
H
Pan tool
L
Layers panel
B
Dark background / white paper

Measure

D
Distance between two points
G
Length along a path
A
Area of a shape
S
Snap on / off
Enter / double-click
Finish a length or area
Backspace
Remove the last point

Mark up

V
Select, drag to move, Delete to remove
P N W
Pen, line, arrow
R O C
Box, ellipse, revision cloud
T K
Text callout, highlighter
Ctrl+Z / Ctrl+Y
Undo / redo
Ctrl+S
Save markups (.markup.json)

Files

Ctrl+O
Open a drawing (or drop it on the window)
Ctrl+P
Print or save as PDF
Esc
Cancel / back to Pan
?
This help

Your drawings and markups stay on this device. Markups are saved as a small .markup.json file you keep next to the drawing; they are also kept in this browser until you clear them.