IsoForge · Drawing to 3D

⌬ Drawing → 3D Wizard

1Upload

2Calibrate

3Detect

4Review

5Fittings

6Build

Source— Scale— Segs— Nodes—

Step 1 · Upload Drawing

Drop a PNG, JPG, or PDF of your isometric drawing. Higher resolution gives better detection.

Drag & drop drawing here

PNG · JPG · PDF · or click to browse

Step 2 · Calibrate

Both calibrations are required to ensure accurate 3D conversion.

① Scale (mm per pixel) required

Pick two points whose real distance you know, then enter that distance in mm.

A — not picked —

B — not picked —

px Pixel distance: —

Real distance between A and B (mm)

② Axis Angles required

Pick 2 points along each axis (X, Y, Z) of a pipe whose direction you know.

X1 — not picked —

X2 — not picked —

Y1 — not picked —

Y2 — not picked —

Z1 — not picked —

Z2 — not picked —

Step 3 · Detect & Edit Segments

Auto-detect runs first; then use the manual tools to clean up or add missing segments.

Auto-detect

Detection parameters

Threshold (binarize) 128 Min line length (px) 40 Iso angle tolerance (°) 5 Endpoint cluster radius (px) 12

Manual edit

Selection

Click a segment or node on the canvas to begin.

Cleanup

Step 4 · Review Segments

Dimensions are auto-filled from the scale. Click any row or segment in the canvas to edit. Delete spurious detections.

Step 5 · Fittings & Metadata

Default fittings are inferred from connectivity. Set the line tag and pipe size before building.

Line tag

Pipe size (mm)

Line color

Fittings per node

Step 6 · Build & Review

A wireframe preview is rendered automatically. Review the topology in the viewport, then click Confirm & Save below.

Generated model JSON

Step 1 of 6 · Enter / Esc

3D Model

Transform the model in space and add annotations on nodes.

3D Transform (rotate · move · scale)

X Pos Rot° Y Pos Rot° Z Pos Rot°

Quick rotations

Custom Labels (annotations on nodes)

No custom labels yet.

Export

Choose a format to download. The model and any baked transforms are exported as-is.

JSON

IsoForge native model — re-importable, ideal for archival or programmatic processing.

.jsonUTF-8

PCF — Piping Component File

Hexagon ISOGEN / Autodesk Plant 3D compatible. Default ANSI SKEYs.

.pcfCAD

STL — 3D Mesh (Binary)

Triangle mesh suitable for 3D printing, mesh-based CAD, or digital twin tooling.

.stlbinarymesh

OBJ — Wavefront Mesh

Plain-text mesh with line tags as group names. Imports into Blender, Rhino, AutoCAD, etc.

.objtext

PNG Snapshot

Render of the current viewport. Toggle below to save with a transparent background.

.pngimage

Transparent background

Convert Your Isometric to 3D

Drop a PNG, JPG, or PDF of an isometric piping drawing — IsoForge auto-detects pipes, lets you confirm dimensions, and builds an interactive 3D model.

1Upload 2Calibrate 3Detect 4Review 5Fittings 6Build

Lines

No model loaded

— · — · —

Preset	Use for	Threshold	Min len
Default	General-purpose iso drawings	128	40 px
Clean CAD	Plant 3D / ISOGEN / SmartPlant exports	140	60 px
Scanned	Photocopied or scanned drawings	110	30 px
Hand-drawn	Sketches or low-quality scans	90	25 px

`Enter`	Advance to next wizard step
`Esc`	Cancel current edit mode / step back
`Del` / `Backspace`	Delete selected segment or node
`+` / `−`	Zoom canvas
`0`	Reset zoom & pan
`Mouse wheel`	Zoom around cursor
`Shift + drag`	Pan the canvas