10 Free AutoCAD Alternatives — and When Each One Fits
If you are looking for a free alternative to AutoCAD, the first question to answer is not "which program is best" but what you actually do with AutoCAD. Drafting 2D plans and details is a completely different world from modelling a mechanical part in 3D, and no single free tool wins at both.
Here are ten real alternatives — all free, all checked, and for each one an explicit note on what it does not do. And at the end: an honest answer to whether you can really give AutoCAD up.
If you draft in 2D
1. LibreCAD
Classic 2D drafting with layers, blocks, dimensions and hatching, built around the DXF format. Light, opens fast, and feels familiar if you come from AutoCAD. What is missing: no 3D, and no full support for recent DWG versions — meaning day-to-day file exchange with an office running AutoCAD will require converting to DXF.
2. QCAD Community Edition
The tool LibreCAD was derived from, with a tidier interface and a large parts library. The community edition is open and entirely free. What is missing: DWG import and export are reserved for the commercial edition. If DWG is part of the daily work, that is a real limitation rather than a technical footnote.
LibreCAD
LibreCAD Project
Lightweight 2D drafting with layers, blocks and dimensions, built around the DXF format.
Get it from the vendor
QCAD Community Edition
RibbonSoft
Mature 2D drafting. The Community Edition is free; DWG and the parts library browser are reserved for the paid version.
Get it from the vendorIf you model in 3D
3. FreeCAD
The most serious alternative on the list. Parametric modelling with a history tree, separate workbenches for solid modelling, drafting, finite-element analysis and BIM, and export to STEP, IGES, DXF and STL. The same file serves both design and checking. What is missing: a steep learning curve, and large assemblies are still less smooth than in a commercial tool.
4. SolveSpace
A small, fast modeller whose whole strength is its constraint engine. It opens in a second and is excellent for simple mechanical parts, mechanisms and dimension checking. What is missing: it is not built for large assemblies or complex projects.
5. BRL-CAD
A veteran solid modelling system developed for the US Army, based on constructive solid geometry with a built-in ray-tracing engine. Strong in analysis — penetration, masses, volumes. What is missing: the interface resembles nothing modern, and the learning curve is very steep.
FreeCAD
FreeCAD Project
Open-source parametric 3D modeller with workbenches for solid modelling, FEM, drafting and BIM.
Get it from the vendor
SolveSpace
SolveSpace Project
Lightweight parametric modeller with a strong constraint solver, for mechanical parts and mechanisms.
Get it from the vendor
BRL-CAD
BRL-CAD Project
CSG solid modelling with built-in ray tracing, aimed at analysis rather than drafting.
Get it from the vendorIf you would rather write than draw
6. OpenSCAD
Modelling in code: you define solids and combine them with boolean operations. Every dimension becomes a real parameter, so one file produces an entire family of parts. Very common in 3D printing and in custom fixing components. What is missing: no mouse sketching. None at all.
7. JSCAD
The same idea, in the browser and in JavaScript. No installation and no account — you open it, write, and see the result. Excellent for demonstration, for teaching and for a quick part to print.
OpenSCAD
OpenSCAD
Code-based 3D modelling where every dimension is a real parameter. Popular in 3D printing.
Get it from the vendor
JSCAD
JSCAD Project
Build 3D models by writing code, in the browser or from the command line.
Get it from the vendorIf you want to work in the browser
8. Onshape — the free plan
A full parametric CAD system running in the browser, with version control and branching in the style of source-control systems. Particularly convenient for team work. The catch: on the free plan every document is public and visible to anyone. Excellent for learning and open projects, unsuitable for client design work.
9. JS.Sketcher
A parametric modeller in the browser with constraint-based sketching, in the style of desktop software. A project still in development — impressive, but not as stable as a mature tool.
Onshape (free plan)
PTC
Parametric CAD in the browser with version control. On the free plan every document is public.
Get it from the vendor
JS.Sketcher
xibyte
A parametric 2D and 3D CAD sketcher that runs in the browser.
Get it from the vendorIf what you need is a floor plan
10. Sweet Home 3D
Many people open AutoCAD only to draw an apartment or office plan for illustration. There is a dedicated tool for that: you draw walls in plan and watch the space build itself in 3D at the same time, with a library of furniture, doors and windows and dimensioned plan output. Far faster than general-purpose CAD.
And what about the AutoCAD student licence?
Autodesk offers the full AutoCAD to students and academic staff at no charge, and it really is the same software. But three conditions matter: the licence is time-limited and needs renewal, it is for non-commercial educational use only — paid work under it is a breach even though the software runs fine — and it requires proof of eligibility. A licence that expires in the middle of a project is a real problem, which is why this is not a long-term strategy.
So can you give AutoCAD up?
An honest answer: it depends who you work with.
If you work alone, or inside an organisation that sets its own formats — yes, absolutely. FreeCAD and LibreCAD will do the job, and you will save a few thousand a year.
If you exchange DWG files several times a day with a structural engineer, an architect and consultants — the DWG compatibility gap will cost you more time than it saves you money. In that case the free alternatives are worth having as complements: 3D modelling, calculation, checking — not as a full replacement.
And from here: all the free software in the directory, or search by field, licence and platform.