Minecraft hanging chain generator

Span and sag — the generator computes the catenary a real chain hangs along and lays it out in blocks: the cables of a suspension bridge, a string of lanterns between posts, an anchor chain. In 3D at once, export to .litematic and .schem.

How it works

1. Set the dimensions with the sliders — the shape is recalculated instantly and shown in 3D.
2. Pick a block (some tools take two: main and secondary).
3. Turn on Layers to see the shape slice by slice — handy for building by hand.
4. Download .litematic for Litematica or .schem for WorldEdit.

Examples

• Chain 33/9
• Long bridge 64/12
• Taut 30/3

FAQ

How is a catenary different from an arc?

A chain does not hang along a circle: it is steeper at the ends and flatter in the middle. The generator uses that exact curve, so the bridge looks real.

How do I build this without mods?

Open the schematic in the viewer, turn on Layers and place blocks layer by layer on the grid. With Litematica or WorldEdit the schematic is pasted in one go.

Why does the shape look stepped?

Blocks are whole, so every curve turns into steps — the game does the same. An odd size gives a clean centre block, an even size gives two.

Is it free, no sign-up?

Yes. Everything is computed in the browser; the file is built locally and never uploaded.

See also: Curved path · Minecraft builder tools