Fusion 360 Alternatives for 3D Printing: 5 Free Options
Fusion 360 alternatives for 3D printing compared on free limits, STL and 3MF export and platforms: FreeCAD, Onshape, Shapr3D, SolveSpace and OpenSCAD.
•4 min read•3D & CAD
Verdict:FreeCAD is the closest free replacement for printing parts: no cap, STL and STEP export. Onshape's free plan is easy but public; Shapr3D's free export is low resolution.
Quick comparison
| Tool | Price | Platforms | Best for | Tested |
|---|---|---|---|---|
| FreeCAD | Free, open source | Windows, macOS, Linux | Parametric parts for printing, with STL and STEP export and no sign-up | Docs only |
| Onshape | Free for non-commercial use (documents are public); Standard $1,500 per user per year | Web browser | Browser-based CAD when public documents are acceptable | Docs only |
| Shapr3D | Free Basic plan (2 projects); Pro $299 per editor seat per year | macOS, iPadOS, Windows, visionOS | Touch and iPad modeling where low-resolution STL and 3MF export is enough | Docs only |
| SolveSpace | Free (GPLv3) | Desktop app | Small constraint-based parts with direct STL mesh export | Docs only |
| OpenSCAD | Free software | Windows, macOS, Linux | Parts defined in code and adjusted by changing numbers | Docs only |
Independent comparison. Paid placements are labelled separately; editorial links earn no affiliate commissions. Learn more.
Good fit if
- You print your own parts and want CAD without sign-up or a paywall
- You want parametric history so a part can be edited after a test print
- You are happy to slice in a separate program
Not ideal if
- You need CAM and simulation in the same app as your modeling
- You need private cloud documents without paying
- You want a one-click sculpting tool
For printing your own parts without Autodesk's hobbyist limits, start with FreeCAD. According to its site it is free, open source, needs no sign-up and reads and writes STL and STEP. Onshape is the easiest browser option but its free documents are public. Shapr3D runs on iPad and Mac but exports only low-resolution STL and 3MF for free. SolveSpace and OpenSCAD are lightweight options for small parts.
What matters when the goal is 3D printing
Fusion's free route comes with conditions. Autodesk publishes a personal-use offer on its hobbyist page. Read the current terms there before you rely on it for printed parts you sell.
Four criteria decide the swap:
- Export. The part must leave the app as STL, 3MF or STEP for your slicer.
- Free-tier limits. Public documents, project caps and low-resolution export all matter more than feature lists.
- Parametric history. You want to change a hole size after a test print without redrawing.
- Platform. Mac, Windows, Linux or browser.
Every tool below only models. A slicer is a separate step. PrusaSlicer's page describes it as free and open source with no account required, available for Windows, Mac and Linux, with one-click sending to Klipper and OctoPrint. Our free 3D printing software guide covers slicers in more depth.
FreeCAD
FreeCAD is a free, open-source 3D modeling application. According to the FreeCAD site, it has no sign-up and no paywall. It runs on Windows, Mac and Linux and reads and writes STL, STEP, OBJ and other formats.
It is parametric: the site says you can change a design by returning to its model history and adjusting parameters, and you can sketch geometry-constrained 2D shapes as the base for 3D objects. That covers the usual printing workflow of designing, test printing and adjusting dimensions.
FreeCAD is the pick for anyone who wants a free tool with no account. Budget time to learn a parametric workflow. More choices are in our open-source CAD software roundup.
Onshape
Onshape is a browser-based CAD service. According to Onshape's pricing page, the Free plan is for non-commercial use only, with unlimited public storage, and all Free documents are publicly accessible.
Private documents need a paid plan. Standard is $1,500 per user per year, and Professional is $2,500 per user per year and adds CAM. Check STL export in the app before committing, because the pricing page does not list export formats.
Onshape fits makers who work on several computers and are fine with their models being public. If you design anything you want to keep private or sell, it is not the right free tier.
Shapr3D
Shapr3D is a CAD app for Apple devices and Windows. Its pricing page lists a free Basic plan on macOS, iPadOS, Windows and visionOS, with up to 2 projects. It imports X_T, STEP, IGES, DWG and STL, but exports only low-resolution 3MF and STL on Basic.
Pro costs $299 per editor seat per year, excluding VAT. The page also says Shapr3D is free for students, teachers and faculty at accredited institutions, with a 365-day renewable licence.
Shapr3D suits someone modeling on an iPad or Mac who prints simple parts, since its page lists iPadOS and macOS. The low-resolution export is the catch: curved parts may look faceted. Test an STL of your own design before moving projects over.
SolveSpace
SolveSpace is a parametric 2D and 3D CAD tool. According to its site, it is free under GPLv3. For printing, it says it can export STL or another triangle mesh that most 3D printers accept. For machining software, it exports STEP or STL.
Check its download page for your operating system before installing. Treat it as a modeling tool, with a slicer as the next step.
OpenSCAD
OpenSCAD calls itself "The Programmers Solid 3D CAD Modeller" on its site, which lists Linux/UNIX, Windows and Mac OS X and describes it as free software. Check its documentation for STL export before relying on it.
Because parts are described in code, a dimension is a number you change and re-render. That suits printed parts that come in sizes, such as boxes, brackets and holders. If you do not want to write code, pick FreeCAD or SolveSpace instead.
Comparison
| Tool | Free tier | Export for printing | Platforms | Main catch |
|---|---|---|---|---|
| FreeCAD | Free, open source | STL, STEP, OBJ | Windows, macOS, Linux | Learning curve |
| Onshape | Free, non-commercial | Check in the app | Browser | Documents are public |
| Shapr3D | Basic plan, 2 projects | Low-resolution STL and 3MF | macOS, iPadOS, Windows, visionOS | Low-resolution export |
| SolveSpace | Free, GPLv3 | STL or other triangle mesh | Check download page | Modeling only |
| OpenSCAD | Free software | Check documentation | Windows, macOS, Linux | Code instead of sketching |
How to choose
A hobbyist printing functional parts for themselves. Use FreeCAD, with PrusaSlicer or another slicer after it. FreeCAD's site lists no sign-up and no paywall.
Someone who designs on an iPad or wants a gentle start. Try Shapr3D's Basic plan and print a test part to judge the low-resolution export. If you outgrow it, FreeCAD is the free fallback.
A person who sells printed parts or keeps designs private. Fusion's personal-use offer, whose terms you should check, and Onshape's public-documents rule both work against you. FreeCAD's site lists no sign-up or paywall, and our free CAD software page lists more.
Limits of this review
No tool was installed or tested, so print quality, learning curve and file repair behavior are not judged. Autodesk's personal-use terms were not read on a directly opened page, so they are not quoted. Onshape's and OpenSCAD's export formats were not found on their pages. Community opinion from Reddit was not collected.
FAQ
What is the best free Fusion 360 alternative for 3D printing?
FreeCAD is the closest match for printing parts. According to its site it is free, open source, needs no sign-up and reads and writes STL and STEP. Onshape's free plan is a browser alternative but makes your documents public, and Shapr3D's free plan exports only low-resolution STL and 3MF.
Is Fusion 360 still free for 3D printing hobbyists?
Autodesk publishes a personal-use offer for Fusion on its hobbyist page. Its limits are not quoted here, so read the current terms on that page before relying on it. If you sell printed parts, check those terms first, or choose a tool such as FreeCAD whose site lists no sign-up or paywall.
Can I use Onshape's free plan for 3D printing?
Yes for non-commercial use only. Onshape's pricing page says Free documents are publicly accessible, so private designs need Standard at $1,500 per user per year, while Professional is $2,500 per user per year and adds CAM. The pricing page does not list export formats, so confirm STL export in the app before relying on it.
Does Shapr3D's free plan export STL?
Yes, but at low resolution. Shapr3D's pricing page says the Basic plan exports low-resolution 3MF and STL only, with a limit of 2 projects. Pro is $299 per editor seat per year. Smooth curved prints may need the paid plan.
Do I still need a slicer?
Yes. These tools model the part; a slicer turns it into printer instructions. PrusaSlicer is free, open source and needs no account, per its page, and can send files to Klipper and OctoPrint. See our free 3D printing software guide for other slicers.
Is there a Fusion 360 alternative for Linux or in the browser?
FreeCAD's site lists Linux among its platforms, and OpenSCAD's site lists Linux/UNIX. Onshape is browser-based, so it runs wherever your browser does. Shapr3D lists macOS, iPadOS, Windows and visionOS only, so it is not an option on Linux. Check SolveSpace's download page for your system.
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Kevin Fan
Kevin Fan is a SaaS founder. He runs Free Instead Of, which tracks free and open-source alternatives to paid software and checks each price and free-plan limit against the vendor's own pages.
Methodology
The official pages of FreeCAD, Onshape, Shapr3D, SolveSpace, OpenSCAD and PrusaSlicer were opened on 2026-10-26 and the figures below come from them. Autodesk's own pages blocked direct access, so Fusion's personal-use terms are not stated here. One roundup article was reviewed for gaps. No Reddit threads were used, because Reddit pages were unavailable to our research tool.