OOpenCAD
● 100% Free & Open Source

The open source CAD editor for engineers

Professional 2D drafting in your browser. Import DXF files, draw with 39 tools, export to PDF — no installation, no license fees. Forever free.

Try the Editor →★ Star on GitHub
31K+
Lines of code
39
Drawing & editing tools
24
Entity types
188
Tests passing
Why OpenCAD

Professional drafting,
zero barriers

Everything you need for 2D engineering drawings — right in your browser.

✎

Design & draft

Create precise 2D drawings with 39 professional tools. LINE, CIRCLE, ARC, POLYLINE, HATCH, DIMENSION, SPLINE, ELLIPSE — plus TRIM, EXTEND, OFFSET, FILLET, CHAMFER, and ARRAY for editing.

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DXF native

Import and export real AutoCAD DXF files with full roundtrip support. 24 entity types preserved. Your existing drawings work out of the box.

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Export anywhere

Vector PDF export for printing. DWG export via ODA File Converter for AutoCAD compatibility. DXF save with Ctrl+S. Your files, your format.

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Full layer system

Organize drawings with professional layer management. Control visibility, lock states, colors, and linetypes. Isolate layers, show/hide all — just like AutoCAD.

Products

CivilAL product suite

Smart tools designed for civil engineers. Each module works standalone or integrated with OpenCAD.

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CivilAL

CivilAL Progress Billing

Automate progress payment schedules tied to construction milestones. Track completed work, generate invoice-ready reports, and manage contractor payments with full audit trails.

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CivilAL

CivilAL Quantity Surveying

Extract quantities directly from drawings. Automated take-offs for concrete, steel, formwork, and earthwork. Link measurements to BOQ items and update in real time as designs change.

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CivilAL

CivilAL Earned Value

Monitor project progress against planned budgets. Calculate earned value percentages, track schedule and cost performance indices, and forecast completion with variance analysis.

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CivilAL

CivilAL Cost Analysis

Break down unit costs for every work item. Maintain material, labor, and equipment price databases. Generate detailed cost estimates and compare bid proposals with market benchmarks.

Pricing

Stop paying $1,975/year
for 2D drafting

OpenCAD gives you professional 2D CAD tools for free. No strings attached.

AutoCAD

Autodesk Inc.
$140 /month
~$1,975/year billed annually
  • ✓ Full 2D & 3D CAD
  • ✓ DWG/DXF native
  • ✓ Industry toolsets
  • ✗ Open source
  • ✗ Self-hostable
RECOMMENDED

OpenCAD

Open source · MIT License
Free / forever
$0 — no credit card, no trial limit
  • ✓ Professional 2D CAD
  • ✓ DXF native, DWG export
  • ✓ Browser-based, zero install
  • ✓ 100% open source (MIT)
  • ✓ Self-hostable