Next.js · Web
FoldNets
Pick a 3D shape and watch its paper net unfold beside it — ready to print, cut and fold.
The shape and its net side by side. Change a dimension and both update together, with glue tabs, fold lines and matching edge numbers already on the net.
Who it is for
For K–8 teachers doing geometry with real paper. It recreates a much-loved DOS-era classroom program, runs entirely in the browser, and needs no account.
How it works
02
Shapes combine into builds. This house is a box with a prism roof, and each part has its own net and its own dimensions.
foldnets.com
03
Curved shapes too. The rocket’s body unrolls into a rectangle with its two round ends, numbered so students know which edge meets which.
foldnets.com
On a phone
On a phone the 3D preview stacks above the net, and the shape library scrolls across the top.
Good to know
- Designs save in the browser and share as a link that holds the whole design. There is no server and no account.
How it is built
Next.js, with Three.js for the 3D view and jsPDF for the print-ready sheets.
Next.js · Three.js · jsPDF
What it costs
Free
$0
No accounts, no sign-up, no server. Designs save to your browser and share as a link that encodes the whole thing in the URL.
- Every shape, preset and export
- Class-set printing
- Save and share without an account