DXF Builder

A TypeScript engine for generating AutoCAD DXF files.

DXF Builder is a zero-dependency, 16KB (gzipped) TypeScript library for generating AutoCAD DXF files in both browser and Node.js environments. It provides a direct bridge between modern web applications and industry-standard CAD workflows, allowing developers to construct geometry, define layers, and attach metadata through a strict fluent API.

The engine runs entirely in memory with no server-side dependencies. Applications stream coordinates, text definitions, and block geometry into a document builder, and DXF Builder validates and serializes the result into AC1027-compliant output. Every generated file is ready for direct import into AutoCAD, CNC workflows, and fabrication pipelines.

Capabilities

Primitives Lines, points, circles, arcs, and ellipses.

Polylines Heavy and lightweight polylines with arc bulges.

Curves NURBS clamped open and closed B-splines.

Fills & Masks Solid polygons, wipeouts, and multi-boundary patterned hatches.

Text Aligned single-line markers and width-wrapped multiline blocks.

Tables Native AutoCAD table definitions and cellular styling.

Dimensions & Leaders Linear, angular, radial metrics, and complex MLeader styling.

Blocks Nested geometry definitions, instances, and ATTDEF/ATTRIB attributes.

Images Raster image dictionaries, definitions, and reactors.

Layouts Model space, paper space, and viewport configurations.

Data Structures Dictionaries, XRecords, and attached XDATA payloads.

Document Setup Layers, custom linetypes, limits, units, and dimension styles.

Stack

Language

TypeScript

Strict mode throughout the entire codebase.

Target

AutoCAD DXF

Generates AC1027-compliant geometry and drawing data.

Architecture

Fluent Builder

Chainable APIs for document and entity construction.

Build

Vite

Bundled for both browser and Node.js environments.

Dependencies

Zero

Written entirely from scratch without external CAD, geometry, or math libraries. The entire engine is just 16KB minified and gzipped.

Testing

Vitest

Unit and integration testing.

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