FreeCAD gives you parametric, open-source CAD without a license fee, but the learning curve is real. Under-constrained sketches can behave unpredictably, edits early in a long feature history can cause naming problems, and moving between workbenches takes time to learn. Existing FreeCAD users may prefer to keep that investment. Someone trying to print a simple part this weekend has easier options.
The plan and workflow limits differ. Onshape requires public projects on its free hobbyist plan, Fusion Personal narrows commercial and advanced use, and simpler tools trade depth for a smaller feature set. Check those boundaries before moving a long-lived project.
CAD workflows split across six tools
Onshape’s free hobbyist plan is the closest browser-based match for parametric CAD, as long as public project files are acceptable. Autodesk Fusion 360 Personal keeps projects private and adds desktop CAD and CAM, but its license limits revenue, active documents, and some advanced features. The open-source options are narrower: SolveSpace for small constrained parts offline, OpenSCAD for geometry written as code, and LibreCAD for 2D drafting only. Tinkercad skips the sketch-and-feature workflow entirely for simple 3D-printing parts built from primitive shapes.
Cloud CAD and direct modeling cover different gaps
FreeCAD is a natural starting point for open-source parametric CAD. It runs on Windows, macOS, and Linux, and FreeCAD 1.0 addressed several long-standing workflow problems. Other tools remain useful for browser collaboration, direct modeling, scripted geometry, or 2D drafting.
The interface and workflow are unfamiliar even to engineers coming from commercial CAD. Workbenches (Part Design, Sketcher, Draft, Arch, etc.) act as separate tools that share a document, and switching between them takes more work than in Fusion 360 or Onshape. The default views, mouse navigation, and shortcuts feel different from every other CAD tool, which raises the cost of switching teams or working on a borrowed machine.
FreeCAD 1.0 reduced the Topological Naming Problem, where editing an early feature can break references in later features, but did not eliminate it. Anyone moving from commercial CAD should expect some models to need repaired references after upstream edits.
Assembly and collaboration differ from browser-based tools. FreeCAD does not include native cloud sync, hosted version history, or real-time co-editing, so a team needs separate file storage and version control.
FreeCAD can be excessive for a one-off STL made from basic shapes.
Six alternatives to FreeCAD
1. Onshape (free hobbyist plan): best free parametric CAD overall
Onshape runs full parametric CAD in the browser, with sketches, a feature tree, assemblies, and version history on the free hobbyist plan. Every free document is public.
What you get without paying:
- Full parametric sketching, feature-based modeling, and assembly design
- Browser-based: no install, runs on Chromebooks and lower-end machines
- Built-in version history, branching, and merging similar to Git
- Real-time multi-user collaboration on a single document
- Drawings, exploded views, and standard mechanical drafting
- Mobile and tablet apps for viewing and basic editing
- Imports STEP, IGES, X_T, SLDPRT and most major CAD formats
- Exports STL, STEP, IGES, DXF, DWG, and more
The main limitation:
- All documents are public. Onshape states this on its free-plan page, so do not use the plan for proprietary or confidential designs.
- The free plan is licensed for non-commercial use. Selling parts designed on it violates the license even though nothing in the software stops it.
- There is no offline mode, which rules the plan out on a slow or unreliable connection.
- Some advanced FeatureScript and PCB integration features are paid-only.
It suits hobbyists, students, open-source hardware projects, and Chromebook users who accept public documents and a non-commercial license. The public-document rule excludes private client work, gifts, competition entries, and unreleased product ideas.
Try Onshape free (opens in a new tab)
2. Autodesk Fusion 360 (Personal Use license): best free desktop CAD with private projects
Autodesk offers its commercial CAD/CAM/CAE platform free to hobbyists and home-based makers through the Personal Use license, as a desktop app for Windows and Mac with cloud sync.
Free Personal Use plan includes:
- Full parametric solid and surface modeling
- Assemblies, drawings, and basic simulation
- Native CAM toolpaths for hobby CNC and 3D printing
- Cloud-synced files with Autodesk’s cloud storage
- Imports and exports STEP, IGES, F3D, STL, DXF, and SAT
- Active learning resources, official tutorials, and a large user community
Where Autodesk has tightened the free plan:
- Active document limit. Autodesk’s personal-use overview lists ten active and editable documents; other stored documents remain read-only until reactivated.
- No commercial use. The Personal license has revenue and business-use restrictions, so verify Autodesk’s current personal-use terms before using Fusion for anything that earns money.
- Some export formats and advanced features (generative design, advanced simulation, 5-axis CAM, specific drawing exports) are paid-only.
- Cloud-only file storage; no true offline mode for collaboration features.
It suits eligible hobbyists who want CAD and CAM in one tool for personal CNC, 3D-printing, or laser-cutting projects, since the built-in CAM workflow removes a separate export-and-import step for milling. The active-document limit is the main drawback; more than ten projects require regular activation changes.
Autodesk can change Personal-plan features and eligibility. Keep exchange-format exports of important projects so a later plan change does not leave the only usable copy in one vendor format.
Try Fusion 360 Personal Use (opens in a new tab)
3. Tinkercad: best for simple models built from primitive shapes
Tinkercad, also from Autodesk, builds models in the browser by adding, subtracting, and grouping primitive shapes.
Included free:
- Browser-based, no install, runs on any modern device including iPad
- Primitive-shape modeling with hole/solid grouping
- Built-in shape generators (gears, threads, text, springs)
- Direct STL, OBJ, and GLB export for 3D printing or game use
- Codeblocks mode (visual scripting) for parametric designs
- Built-in tutorials, classroom features, and shared libraries
- Free Tinkercad accounts permit personal and educational use
What it cannot do:
- No real parametric feature tree: edits are local to the shape, not a re-evaluatable history
- No fillets, chamfers, or sweeps in the same sense as parametric CAD
- No assemblies, drawings, or technical documentation
- No advanced curve or surface tools
- Complex parts become difficult to revise because groups do not form a parametric feature history
It fits replacement parts such as a drawer pull or knob, simple enclosures, name plates, brackets, jigs, classroom work, and anything that can be expressed as a stack of primitive shapes. Move to a parametric tool when changing one dimension should update dependent geometry, because Tinkercad does not provide that feature-history workflow.
Try Tinkercad free (opens in a new tab)
4. SolveSpace: best lightweight free open-source parametric CAD
SolveSpace does less than FreeCAD on purpose. The open-source tool handles parametric 2D and 3D CAD for constrained mechanical parts and assemblies.
What it covers:
- Parametric 2D sketching with constraint-based solving
- Extrude, revolve, helical sweep, and Boolean operations for 3D modeling
- Constraint-based assembly modeling
- DXF, SVG, PDF, STL, and STEP export
- Runs on Windows, macOS, and Linux
- Free and open source under the GPL, with no commercial-use restriction
- A compact desktop application without a bundled cloud service
Where it falls short:
- Feature set is narrow compared to FreeCAD or Fusion 360: no surface modeling, no advanced filleting, no native drawings module
- The interface is utilitarian: closer to early-2000s engineering software in feel
- Smaller community and fewer tutorials than FreeCAD or Fusion
It gives up FreeCAD’s range of workbenches and the cloud collaboration in Fusion or Onshape. In exchange, engineers and makers get lightweight parametric CAD with a small installer and no cloud dependency or commercial account, suited to small mechanical parts, jigs, and brackets more than complex surfacing.
Try SolveSpace free (opens in a new tab)
5. OpenSCAD: best free CAD for users who would rather code than sketch
OpenSCAD compiles a text script into a 3D model instead of an interactive drawing, so every dimension can be a variable.
The open-source tool includes:
- Full programmatic 3D modeling: every dimension is a variable
- Boolean operations (union, difference, intersection)
- Imports DXF, SVG, and STL; exports STL, OFF, AMF, and 3MF
- Cross-platform: Windows, macOS, Linux
- GPL-licensed: no commercial-use restriction
- Community libraries such as BOSL2, MCAD, and NopSCADlib
The main limitation:
- No interactive sketching. Every shape is described in code; nothing is drawn with the mouse.
- Complex models can take longer to render
- Steep learning curve for non-programmers
- No native assembly or drawing tools
- Not a good choice for anyone whose mental model of CAD is “draw shapes in space”
Because the design is text, source control diffs stay readable, and one script can generate an enclosure or gear in several sizes from exposed parameters. That suits programmers and engineers, while an interactive modeler is a better fit for drawing a one-off part directly.
Try OpenSCAD free (opens in a new tab)
6. LibreCAD: best free 2D drafting tool
LibreCAD drops 3D entirely and concentrates on drafting: floor plans, mechanical drawings, schematics, and technical illustration.
The open-source app includes:
- Full 2D drafting tools: lines, arcs, splines, dimensions, hatching, layers
- DXF support and limited DWG interoperability
- Cross-platform: Windows, macOS, Linux
- Free and open source under the GPL
- Mature and stable: has been in active development for over a decade
What it does not do:
- No 3D modeling at all: strictly 2D
- Interface is utilitarian and dated
- DWG support uses third-party libraries; very recent AutoCAD DWG versions sometimes need conversion
- No parametric blocks in the SolidWorks/Onshape sense
It fits floor plans, workshop layouts, and DXF files exchanged with a CNC vendor, whenever the project does not need a 3D model.
Try LibreCAD free (opens in a new tab)
Compare modeling style, platform, and privacy
| Tool | Parametric | Private projects | Commercial use allowed | Offline | Best for |
|---|---|---|---|---|---|
| Onshape Free | Full | ❌ Public only | ❌ Hobbyist license | ❌ Browser only | Hobbyists who want pro CAD |
| Fusion 360 Personal | Full | ✅ Yes | ⚠️ Under revenue threshold | ⚠️ Cloud-tethered | Home makers needing CAD + CAM |
| Tinkercad | ❌ Primitive-based | ✅ Yes | Check current terms | ❌ Browser only | Beginners and quick prints |
| SolveSpace | Full (lightweight) | ✅ Yes | ✅ GPL: no restriction | ✅ Yes | Small mechanical parts |
| OpenSCAD | Full (script-based) | ✅ Yes | ✅ GPL: no restriction | ✅ Yes | Programmers and parametric variants |
| LibreCAD | 2D only | ✅ Yes | ✅ GPL: no restriction | ✅ Yes | 2D drafting and floor plans |
| FreeCAD (reference) | Full | ✅ Yes | ✅ LGPL: no restriction | ✅ Yes | Users who want everything in one tool |
How to choose the right free CAD tool
Project constraints narrow this list faster than rankings do. A few practical filters:
Project privacy. Onshape’s free plan requires public documents. Choose another tool for a gift, client project, competition entry, or any design that must stay private.
Commercial use. Fusion 360’s Personal license caps revenue. Onshape’s free plan does not allow commercial use. Tinkercad’s terms allow personal commercial use of designs you create. SolveSpace, OpenSCAD, LibreCAD, and FreeCAD use GPL or LGPL licenses without a commercial-use restriction. An unrestricted license avoids a later migration if the project begins earning money.
Offline use. Onshape and Tinkercad require an internet connection. Fusion is cloud-tethered for collaboration features. SolveSpace, OpenSCAD, LibreCAD, and FreeCAD run offline.
Part complexity. Tinkercad fits a simple printable object built from primitive shapes. Mechanical parts with constraints, fillets, and assemblies point to Onshape, Fusion, SolveSpace, or FreeCAD. OpenSCAD fits one scripted design produced in many sizes.
Vendor policy risk. Fusion 360 Personal has been narrowed multiple times over the past five years. FreeCAD, SolveSpace, OpenSCAD, and LibreCAD do not depend on a commercial vendor continuing the same free license terms.
Where switching CAD tools costs time
Tinkercad’s grouping is destructive: once you group a hole into a solid, you cannot easily edit the hole’s depth without ungrouping and rebuilding upstream changes. If you need to iterate dimensions, use a parametric tool from the start.
Onshape’s public-documents rule is easy to forget when the editor looks like paid CAD. Anything you do not want to share publicly belongs in Fusion 360 Personal, FreeCAD, or SolveSpace instead of Onshape Free.
Past ten active projects in the Autodesk cloud, Fusion 360 Personal users spend small chunks of time activating and deactivating files instead of designing. Plan to archive completed projects as STEP files outside the cloud, or accept that more than ten in-flight projects means it is time to evaluate Onshape or FreeCAD.
OpenSCAD suits parametric variants and version-controlled designs, but it is slow going when the job is to draw a bracket once and print it.
STEP files transfer geometry between these tools, but feature history almost never survives the trip. A part started in Fusion and moved to FreeCAD needs its feature tree rebuilt, so pick the tool in which you can finish the project.
Switching from FreeCAD to a browser-based CAD
FreeCAD and Onshape share concepts such as sketches, constraints, features, parts, and assemblies. Their interfaces and file models differ, but that common vocabulary helps when rebuilding a project.
A practical migration order: open an existing FreeCAD project, export each part as STEP, import the STEP into Onshape, and then rebuild the feature tree by referencing the FreeCAD model as a visual guide. Do not try to import the FreeCAD file directly: Onshape does not read FCStd, and even if it did, the feature history would not transfer cleanly. Treat the migration as a rebuild informed by the original geometry, not a conversion.
For users moving from Fusion 360 to FreeCAD, often because of license uncertainty, the same principle applies: STEP preserves geometry, but the feature tree needs a manual rebuild. Estimate the work from a representative project before moving the rest of the library. Once rebuilt in FreeCAD, the design no longer depends on the Fusion 360 project format.
Commercial work is where the free CAD plans end
Onshape Free and Fusion Personal both exclude commercial use, so the first paid plan is also the first license that lets a design earn money. Onshape and Autodesk list these US subscription prices, checked in September 2026:
| Tool | Paid plan | Price | Commercial license covers |
|---|---|---|---|
| Onshape | Standard | $1,500 per user a year | Private documents, commercial use, direct support; Professional, at $2,500, adds release management, PDM, simulation, rendering, and CAM |
| Autodesk Fusion | Fusion | $680 a year, or $57 a month billed annually | Commercial use without the ten-active-document limit, PCB design, drawing automation, team collaboration |
| Tinkercad | None | Free | Autodesk keeps it free in the browser |
| FreeCAD, SolveSpace, OpenSCAD, LibreCAD | None | Free | Open-source licenses that allow commercial work |
The price gap is wide: a year of Onshape Standard costs more than two years of Fusion, while the open-source tools stay free for paid client work.
When FreeCAD remains the better choice
FreeCAD remains the right answer when you already know its workbench system or need several engineering modules under one LGPL license. It covers parametric modeling, technical drawings, sheet metal, architecture, FEA, CAM, and rendering in one application. A project that depends on Assembly4, A2plus, the Path workbench, or the FEM workbench has no direct free replacement in this list.
For users in those situations, the right move is usually to keep using FreeCAD and supplement it with a faster tool for one-off tasks: Tinkercad for quick prints, LibreCAD for 2D-only jobs, OpenSCAD for parametric variants.
Public cloud CAD, private desktop CAD, or open source
Privacy makes the first cut. Files that can be public point to Onshape, while private files point to Fusion 360 Personal, if its current license fits, or to an open-source desktop tool. Whichever you choose, export important work as STEP files periodically so a later license or tool change does not trap the project.
None of the open-source options replaces FreeCAD’s full breadth, but SolveSpace, OpenSCAD, and LibreCAD are each quicker for the narrower tasks they cover.
Use Tinkercad for a first printable part when speed matters more than a parametric feature history.
Labels and logos for a part are vector work, compared in the free Illustrator alternatives guide. Documentation images and render backdrops come from the free Photoshop alternatives and the free stock photo sites.
