Features

A complete papercraft pipeline, in one browser tab.

Load a mesh, size it to the real world, refine the seams, and export files a print shop or cutting machine can use straight away.

3D to Flat · studio · longsword.stl · US Letter

Finished size

650 mm

Parts

Joins

Tab width

6 mm

Parts+2

3D model

Sheet 1 / 1 · US Letter

Drag to rotate · drag pieces to arrange · click a part CutMountainValley 6 parts · 61 joins

Geometry

Multi-format loading: OBJ, STL, 3MF, binary FBX, GLB and glTF are read directly in the browser. ZIP bundles keep related model, material and texture files together.
Planar panel detection: Coplanar triangles are merged into single panels, so a cube unfolds as six squares instead of twelve triangles.
Even chunking: Large surfaces are segmented into compact, similarly sized regions rather than one sprawling patch.
Automatic part splitting: Models too big for a sheet are cut into labeled sub-assemblies (A, B, C) at natural necks.

Target dimensions: Type a finished height, width or depth in millimeters or inches; the rest follows proportionally.
Scale bar: A log-scale slider from 20 mm to 2 m with live width × height × depth readouts.
Fit on page: One click scales the build until the largest piece fits inside your margins.
Small-piece warnings: Anything that would print too small to cut cleanly is flagged before you export.
Detail control: A minimum-detail setting merges fine detail away, so dense sculpts behave like low poly models.

Linked 3D and 2D views: Select a face in either view and its twin highlights in the other.
Exploded model view: A separation slider pulls the pieces apart live so you can read the part breakdown.
Cut, join, rotate, drag: Pepakura-style tools with compatible-edge highlighting when the join tool is armed.
Overlap detection: Self-overlapping or off-page pieces are outlined with a plain-language fix suggestion.

Glue tabs: Automatic tab placement with adjustable width, per-tab flip and delete.
Fold styles: Mountain and valley folds drawn with independent color, weight and dash style.
Numbered joins: Matching IDs on both halves of every seam, numbered in assembly order.
Full-color printing: Textures and material colors from GLB, glTF, 3MF or a zipped OBJ are printed onto the sheets under the line work, so pieces come off the printer already painted.
Per-material color control: Swap any material for a flat color of your choice, or turn printed color off for plain outlines.

Tiled to US Letter, A4, A3 or Tabloid with registration marks, a true-scale ruler, a color legend and a step-by-step assembly guide.

Vector cut, fold and tab layers ready for Cricut, Silhouette, laser cutters and drag knives.

LWPOLYLINE and TEXT entities for CAD, CNC and shop-floor software.

Flattening runs in your browser, with no upload and no server round-trip.

Pro members can save up to 25 projects to their account, keeping the model, settings and edits together.

The same model and settings always produce the same layout.