Linework
Stays on this device

Open a CAD drawing

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

or drag files or a folder 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), DWG (R13 to 2018), DGN v7 and PDF (one page at a time).

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
Arrow keys
Pan (in Edit, with a selection: nudge it)
H
Pan tool
L
Layers panel (DGN: name levels with the pen, or import a names file)
Ctrl+F
Find text (Enter / Shift+Enter or F3: next / previous); in Edit also replace
J
Trace a wire: click it to light up its net (ends at cells and pins, labels, length); Esc clears
I
Element info: type, level, colour, weight, text, size, DGN element and offset
B
Dark background / white paper
Page Up Page Down
PDF: previous / next page

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)

Edit the drawing

E
Edit mode: select drawing items (or click the Edit tab)
Click / Shift+click
Select / add or remove
Ctrl+A
Select everything on the visible layers
Drag a box
Left→right: items fully inside · right→left: anything touched
Drag
Move (snaps; Shift keeps it straight)
Arrow keys
Nudge 1 px (Shift: 10 px)
Double-click
Edit text in place, or show points to reshape
Right-click a point
Delete it · right-click or double-click a side to add one
N P R O T
Line, polyline (C closes), rectangle, circle, text · Esc back to Select
Layer, Colour, Weight
For new items; with a selection they show and change the selection
Type a number
While drawing a line: exact length (a circle: radius), then Enter
Key-ins
Type XY=x,y · DL=dx,dy · DI=distance,angle in a draw tool for exact points; with a selection they move it (or copy it), AA=angle rotates it · Esc cancels
More ▾
Mirror, scale, array, move / copy / rotate by a value, select same level / colour / weight / type, match attributes
Delete
Delete the selection
Ctrl+C / Ctrl+V
Copy / paste, also between drawings and tabs (click places; Ctrl+Shift+V: in place)
Ctrl+D / Ctrl+drag
Duplicate (click places) / drag a copy (Alt+drag on a Mac)
Right-click
Menu: edit, copy, duplicate, rotate, delete, paste here / in place
Ctrl+S
Save the drawing (in Edit) · Ctrl+Shift+S save as DXF / DGN

Touch

One finger
Pan (Pan tool), draw or drag with the other tools
Two fingers
Pan and pinch to zoom, in every tool
Tap / drag
In Edit: select / move; drag on empty space for a box
Long-press
In Edit: menu (edit, copy, duplicate, rotate, delete, paste)
Finish / Cancel
The bar at the bottom ends a polyline, length, area or paste

Files

Ctrl+O
Open a drawing (or drop it on the window)
Ctrl+Shift+O
Open a folder as a sheet set (or choose or drop several drawings): a list of sheets with their titles, Find in all sheets, sheet references (“SHEET 4”, “SEE DWG …”) become links
Page Up / Page Down
Previous / next sheet of the set (each keeps its view and hidden layers)
Ctrl+P
Print or save as PDF, to scale (1:50, 1"=20') on Letter to ANSI D or A4 to A1
Open
Recent drawings: one click reopens them (names only are kept; Clear list forgets them)
Edit › Save
Saves over the file you opened when the browser allows it (asks once, keeps a backup copy if it may); otherwise downloads a copy
Unsaved edits
Kept in this browser until saved: reopen the drawing after a crash or a closed tab to get them back
View › Compare
Another revision over this one: only here red, only there green, the rest dimmed
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.

Save the drawing

Format

    New layer

    Colour