Articles on: Integrations & automation

The Fusion 360 integration: send designs straight to SimplyPrint

The SimplyPrint add-in for Autodesk Fusion 360 lets you export the active design and upload it to your SimplyPrint account in one click. Pick STL or 3MF, choose what to export, dial in the mesh quality, press Send, and the file lands in SimplyPrint ready to slice and print.

Prefer to see it in action? Walk through the add-in in our interactive demo.

What you can do

Export .STL, .OBJ, or .3MF files directly to SimplyPrint
Choose whether to start a print on one or multiple 3D printers
Or queue the print
Or save the file to your SimplyPrint cloud storage

Install

The add-in is currently being submitted to the Autodesk App Store. Until that listing goes live, install it with the Windows installer (recommended) or sideload it manually using the zip - the steps for both are below.

Option 1 - Windows installer (recommended)

Download SimplyPrintFusionExport-Installer.exe from here.
Run the installer. Click through the 3 screens (welcome, install location, finish) - it drops the add-in into Fusion's AddIns folder for you.
Open Fusion 360, or restart it if it was already running.
Press Shift+S to open the Scripts and Add-Ins dialog, then switch to the Add-Ins tab.
Select SimplyPrintExport in the list, click Run, and tick Run on Startup so it loads automatically in future sessions.

Option 2 - Manual install (Windows, macOS)

Download SimplyPrintFusionExport.zip from here.
Extract the zip somewhere you'll keep around. Your Documents folder is a safe choice - don't leave it on your desktop or in Downloads where it might get cleaned up later. You'll end up with a folder called SimplyPrintFusionExport containing the add-in files.
Open Fusion 360 and press Shift+S to open the Scripts and Add-Ins dialog. Switch to the Add-Ins tab.
Click the green + button next to My Add-Ins, navigate to the extracted SimplyPrintFusionExport folder, and click Open (or Select on macOS).
Select SimplyPrintExport in the list, click Run, and tick Run on Startup.

If you ever move the SimplyPrintFusionExport folder, Fusion will lose track of the add-in. Remove and re-add it using the + button at the new location.

Once active, the SimplyPrint button appears on the UTILITIES panel and next to Fusion's built-in 3D Print button on the MAKE panel.

How to send a design to SimplyPrint

Open the design you want to print in Fusion 360.
Click the SimplyPrint button on the UTILITIES panel. The export dialog opens on the right.
The first time you use the add-in, click Log in under SimplyPrint account. Your browser opens SimplyPrint's sign-in page - approve the request and return to Fusion. You stay signed in for future exports.
Configure the export options (see below), then click Send.
SimplyPrint opens in your browser with the file pre-loaded. From there you can save it to your cloud storage, slice it, queue it, or start a print on one or more printers.

Export options explained

Format

Option	When to use
STL	Universal mesh format. Pick this if you're not sure - every slicer reads it.
3MF	Newer format that preserves units, colour, and per-body metadata. Better for multi-body or multi-material prints.

Scope

Option	What it exports
Entire design	Every body in the active design.
Selected bodies	Only the bodies you pick in the canvas. A picker appears below the dropdown.
Selected components	Only the components you pick in the canvas.

Visible only

When checked, hidden bodies are skipped even if they fall inside your scope. Use this to quickly hide construction geometry without unselecting it.

One file per body

When checked, each body exports as its own file (and each gets its own card in SimplyPrint). Off by default - everything bundles into a single STL or 3MF.

Mesh quality

Controls how finely Fusion tessellates the design into triangles. Higher quality means smoother curves and larger files.

Preset	What you get
Low	Fast export, larger triangles. Good for quick test prints.
Medium	Balanced - the recommended default for most prints.
High	Fine detail, larger file. Best for show-piece prints with curved surfaces.
Custom	Exposes surface deviation, normal deviation, aspect ratio, and max edge length sliders for full control.

Logging out or switching accounts

Open the SimplyPrint dialog in Fusion, expand the SimplyPrint account group, and click Log out. Your stored token is cleared and you can sign in with a different account next time. Signing out in Fusion doesn't affect any other SimplyPrint plugins you may have installed (Blender, SketchUp, etc.) - each handles its own session.

Uninstall

In Fusion, press Shift+S to open the Scripts and Add-Ins dialog. Open the Add-Ins tab, select SimplyPrintExport, and click Stop. Untick Run on Startup so it doesn't reload next launch.
If you used the Windows installer, run SimplyPrintExport in Add or remove programs and uninstall it from there.
If you installed manually, delete the SimplyPrintFusionExport folder you extracted earlier.
Optionally delete ~/.simplyprint/oauth_fusion.json and ~/.simplyprint/fusion/ to remove the stored token and preferences.

Troubleshooting

Sign-in window opens but never returns. Your browser may be blocking the localhost redirect. Try a different browser, or paste the printed authorize URL into the browser manually.
"Could not start callback server." Another process is using the local port the add-in needs. Close any other Fusion sessions or restart your computer.
The Send button doesn't do anything. Check the Status field at the bottom of the dialog - upload errors show up there. The most common cause is being signed out, so confirm you see Signed in as ... at the top.
The SimplyPrint button is missing from the toolbar. Press Shift+S, open the Add-Ins tab, select SimplyPrintExport, and click Run. If it's not in the list, Fusion can't find the add-in folder - re-add it using the green + button (manual install) or rerun the installer.

Updated on: 26/06/2026

Was this article helpful?

Thank you!