Browser-based stack printing

Stack copies vertically.Print once, pull apart.

Print Stacker takes one STL and builds a stacked 3MF with every copy placed on the build plate and a thin gap between them — so you can batch-print identical parts in a single job.

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Built for makers

A focused workflow from STL upload to downloadable 3MF.

Runs in your browser

STL parsing, 3D preview, and 3MF packaging happen locally. Your files never leave the device.

Layer-aligned gaps

Gap spacing snaps to whole layer heights so each copy can be ironed before the next one starts.

Live preview

Rotate the stack, inspect gap layers in accent color, and check total height before you download.

Slicer-ready output

Export a Bambu Studio project with presets baked in, or a generic 3MF for any slicer.

Where it started

Print Stacker is a community tool inspired by an existing stacking workflow.

MultiStack

The original browser utility this project builds on.

MultiStack by mrj0ne5CTHS stacks MultiBoard tiles into a Bambu Studio project: one mesh, many instances, and a fixed 0.20 mm gap so copies pull apart after printing.

View MultiStack

What we added

Same core idea, opened up for any part.

Print Stacker generalizes the workflow: any STL, configurable gap layers (1–3), Bambu nozzle presets, a live 3D preview, and both Bambu Studio and generic 3MF exports.

MultiBuild (designed by Jonathan Odom) is the modular wall system MultiStack was built for. Print Stacker is not affiliated with or endorsed by MultiStack or MultiBuild.

Ready to stack?

Drop an STL, tune your stack, and download a slicer-ready 3MF in seconds. The full walkthrough lives in the guide.

Open the guide