The free 3D Print Orientation Optimizer
Automatically test dozens of orientations of your STL and rank them for least support, fastest print, best surface quality or most stable.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
A T-shaped bracket: lying on its back needs 4.2 cm³ of support, standing on its stem 0.4 cm³ but taller by 60 mm; the optimiser lists both with height, bed area and support so you pick for your goal.Open the 3D Print Orientation Optimizer
Illustration. Open the tool for the real thing.
See it in action
Sample input: File = sample.stl. Pressed Analyse orientations.
What is the 3D Print Orientation Optimizer?
Orientation decides how much support a print needs, how long it takes, how rough its surfaces are and how strong it is. This tool tests every large flat face of your model (laid on the bed), the six axis directions and a 40-point sphere sample. For each candidate it measures build height (a time proxy), bed-contact area (stability and adhesion), overhang area and support volume (overhangs cast to the bed) and visible stair-step area (near-horizontal curved surfaces whose layer lines show).
Pick the goal that matters — least support, fastest print, best surface or most stable — and the candidates are ranked with that weighting. Preview any orientation in 3D with overhangs coloured, and download the oriented STL ready for your slicer. A note on strength is included: FDM parts are weakest between layers, so orient load-bearing parts with the load along, not across, the layers.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Flat faces, axis directions and a sphere sample are all scored.
Least support, fastest, best surface and most stable weightings.
See exactly where support would go in each ranked orientation.
Ready-to-slice file in the chosen orientation.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
How it compares
A plain look at this tool next to the usual alternative.
| This 3d tool | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
How is the ranking computed?
Each metric is normalised and combined with goal-specific weights (support, height, surface roughness, bed contact).
Does it consider strength?
Only indirectly via stability; layer-direction strength depends on loads, which the tool cannot know.
Can it handle big models?
Yes, though models above ~500k triangles take a few seconds per analysis.
Is my model uploaded?
No — everything is calculated in your browser.
How do I use the 3D Print Orientation Optimizer?
1. Drop in your model. 2. Choose your goal and overhang angle. 3. Press Analyse orientations. 4. Preview the top results and download the best STL.
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Try the 3D Print Orientation Optimizer now
Find the best print orientation for less support, speed, strength or surface. Free to use.
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