# KulmanLab CAD

> Free, browser-based CAD editor for DXF files. No registration, no ads, no data collection.

KulmanLab CAD is a lightweight web CAD application that runs entirely in the browser. It allows engineers, CNC enthusiasts, and designers to open, draw, edit, and export DXF files without installing any software.

## App

https://kulmanlab.com/

## Documentation

Full command reference: https://kulmanlab.com/docs/

## Source code

https://github.com/volodymyr4509/kulmanlab

## Features

- Open and save DXF files (import/export as DXF or JSON)
- Draw 2D entities: lines, circles, arcs, ellipses, polylines, splines (CV and fit), text
- Annotate: linear, aligned, continue, radius, diameter, and angular dimensions; multileader arrows
- Edit: move, copy, rotate, scale, mirror, delete, trim, extend, offset, fillet, chamfer, undo/redo
- Grip-based editing (drag endpoints, midpoints, centers)
- Layer management: make current, match, isolate, unfreeze
- Paper layouts and viewports: create, copy, resize, lock, set scale
- Page Manager: set paper size, orientation, and drawing scale per layout
- Match Properties: copy color, layer, and style between entities
- Measure distance and angle between points
- Print to PNG/PDF with area selection
- Runs offline in any modern browser — zero registration, zero ads, fully client-side

## Who is it for

- Mechanical and civil engineers who need a quick DXF viewer/editor
- CNC operators preparing cutting paths
- Makers and hobbyists working with laser cutters or CNC routers
- Anyone who needs to open or edit a DXF file without paying for AutoCAD

## Commands

### Shapes
- Line — draw a straight line segment
- Polyline — draw a multi-segment open path
- Rectangle — draw an axis-aligned rectangle
- Circle — draw a circle by center and radius
- Arc — draw an arc through three points
- Ellipse — draw an ellipse by center and two axes
- Text — place a text label on the canvas
- Spline CV — draw a spline by placing control vertices
- Spline Fit — draw a spline that passes through clicked points

### Edit
- Move — move selected entities to a new position
- Copy — copy selected entities to a new position
- Rotate — rotate selected entities around a base point
- Mirror — mirror selected entities across a line
- Scale — scale selected entities around a base point
- Delete — remove selected entities
- Trim — trim a line at its intersections
- Extend — extend a line to the nearest boundary
- Offset — create a parallel copy at a given distance
- Fillet — round a corner with a tangent arc
- Chamfer — cut a diagonal corner between two lines
- Undo / Redo

### Markup (annotations)
- Leader — draw a multileader annotation with arrowhead and text
- Leader+ / Leader− — add or remove arms from an existing multileader
- Dimension Linear — horizontal or vertical dimension
- Dimension Aligned — dimension aligned to two points
- Dimension Continue — chain a new dimension from the last one
- Dimension Radius — radius dimension to a circle or arc
- Dimension Diameter — diameter dimension to a circle
- Dimension Angular — angular dimension to two lines, arc, or circle

### Layers
- LayerMakeCurrent — set the current layer to match a clicked entity
- LayerMatch — reassign selected entities to another entity's layer
- LayerIsolate — freeze all layers except those of selected entities
- LayerUnfreezeAll — unfreeze all layers in one step

### Layouts & Viewports
- ViewportRectangle — create a viewport in a paper layout by picking two corners
- ViewportCopy — duplicate a viewport to a new position
- PageManager — edit paper size, orientation, and scale for the active layout

### Navigate
- Pan — click and drag to move the viewport
- Zoom In / Zoom Out — zoom the canvas
- Fit — fit all entities into view

### Measure
- Distance — measure the distance between two points
- Angle — measure the angle between three points

### Style
- Match Properties — copy color, layer, and other properties from one entity to others

### File
- Import — open a DXF or JSON drawing file
- New File — start a fresh blank drawing
- Files — browse and restore recent drawings
- Print — export a drawing area as image or PDF
- Export — download the drawing as DXF or JSON
- WipeStorage — clear all drawings from browser storage