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Compression Spring Generator (OwlCAD)

A printable coil spring from wire size, diameter, length and coil count, always one solid body

Compression Spring Generator (OwlCAD) is a free browser tool for printing a small spring for a button, latch or toy. The customizers and the editor are free; only OwlCAD's AI features need the Pro subscription. Exports STL and 3MF; no account needed. Last checked 16 October 2026.

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At a glance

Price: The customizers and the editor are free; only OwlCAD's AI features need the Pro subscription
Runs on: Browser
Exports: STL, 3MF
Multicolor: No, single color
Account: Not needed
Open source: No
Skill level: Beginner: fill in a form
Best for: Printing a small spring for a button, latch or toy
Selling prints: Allowed OwlCAD's terms include commercial use on every plan, the free tier included: you may sell prints, sell or license the files and use them in a product, with no royalty and no attribution required.
How we checked: Opened the generator Customizer opened in a browser with no account: the default spring rendered in 3D with all settings; pricing and terms read
Checked by: Mike Janssen
Last checked: 16 October 2026

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Sources: Compression spring customizer, OwlCAD pricing, OwlCAD terms (checked 16 October 2026)

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About this generator

The Compression Spring Generator is one of the free customizers in OwlCAD, a browser-based parametric CAD tool. It makes a helical compression spring as one swept solid, so it always comes out as a single connected body rather than a stack of rings.

You set the wire diameter (0.2 to 12 mm), the outside diameter (2 to 200 mm), the free length (2 to 300 mm) and the number of coils (2 to 60). The gap between the coils, which decides whether it prints, is worked out and reported; ask for a length too short for that many coils and it is raised to the shortest one that works, with a note. Ends can be open, closed or closed and ground flat, the hand left or right, and the wire round or square.

It runs in the browser with no account and costs nothing; only OwlCAD's AI features are paid. It is one of 35 free OwlCAD customizers, and you can open the result in the full editor if you want to change more. Its terms give you full commercial rights to what you make, the free plan included.