Free Online DXF Viewer

A view-only tool can show you a problem but cannot fix it. CAD Editor is a 2D CAD editor, so when you spot a wrong line or a missing label, you fix it on the spot instead of going back to the person who sent the file.

• Lines, polylines, arcs, circles, ellipses, hatches and text.
• Layers you can turn on and off, and set for each object.
• Angle snaps at 30, 45, 60 and 90 degrees, object snaps, ortho and polar tracking.
• Architectural units, so lengths read in feet and inches.
• The keyboard commands CAD users already know, plus undo and redo.

When you are done, choose File, Export, Export to DXF to download the new file. You do not need a second program to make the change.

A DXF that looks fine can still waste a sheet of material. Five checks catch most problems:

1. Measure the overall size with the distance tool on the Tools tab and compare it with your material.
2. Check the units. Open File, Drawing Units to see the units and precision the drawing uses. A part drawn in inches and cut in millimeters comes out 25.4 times too small.
3. Turn layers off one at a time to find construction lines, notes and dimensions that should not be cut.
4. Look for doubled lines. Two lines on top of each other make the laser cut the same path twice. Zoom in on corners and joints.
5. Check that shapes close. A small gap at a corner can stop cutting software from finding a closed outline.

Fix what you find, then export a fresh DXF and send that file to your cutting software.

Most people who search for a DXF viewer choose between an online viewer and a free desktop program such as LibreCAD. Here is how they differ:

LibreCAD is a good free choice on a computer you can install software on. CAD Editor fits when you want to open the file now, on any device, without installing anything.