Minecraft helix generator

Diameter, height, turns and number of strands — the generator winds a block helix: a double DNA helix for a lab, a twisted column, a ribbon around a tower. 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

• DNA column
• Tight helix
• Triple ribbon

FAQ

How do I avoid gaps in the helix?

More turns over the same height make the line shallower and the blocks closer together; for a steep climb add height or reduce the turns.

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: Spiral staircase · Minecraft builder tools