1 Start

Start from nothing, a file, or someone else’s model

Sign in with Google and you land on Home: your models, and what’s trending in the Community. Everything saves to your account about a second after you change it.

New model for an empty workplane, or Duplicate to try an idea on a copy.
Import an STL, 3MF (with its colours) or SVG up to 64 MB, like a model you downloaded from Thingiverse, Printables or MakerWorld.
Make my own copy of any model shared in the Community, and change it however you like.

The Home page Importing and exporting Tweak files from other sites

The twyk Home page: your models, and models trending in the Community

2 Build

Drop in shapes. Cut with holes. Merge.

Click a shape and it lands on the workplane. The library goes far past boxes and cylinders: ten categories, from gears and stars to symbols, parts, home and building pieces, plus text.

Search understands everyday words, so “donut” finds the torus.
Every shape stays editable: a gear can get more teeth, a star more points, long after you placed it.
Solid, Hole or Hollow: turn a shape into a hole, then Merge to cut it into the part.
Group parts to move them together, or Merge them into one solid.

Adding shapes Holes, Group and Merge Hollow shapes

The Shapes tab: the Basic category with box, cylinder, sphere, cone and more

The properties panel of a pen cup: Solid, Hole or Hollow, sizes and colours

A 60 by 40 by 18 mm block with two see-through hole cylinders placed in it — Your first model in five minutes: a plate with bolt holes. Follow the tutorial ›

The same block with two clean bolt holes cut through it — Your first model in five minutes: a plate with bolt holes. Follow the tutorial ›

3 Make it exact

Type the size. Get exactly that size.

Parts that fit first time aren’t luck. Drag the grips for a rough size, then type the real numbers.

Grips on every object: corners resize width and depth, the top grip sets the height, the arcs turn it.
Click a measurement on the model and type a new value, or use the properties panel.
Millimetres or inches, snapping from 0.1 to 10 mm, with plate presets for common printers.
The ruler shows the size, the distance to the nearest parts, or the margins inside what it sits on.
Align in nine ways on all three axes, mirror in place, or space parts evenly.

Moving and resizing The ruler Align and mirror

Four shapes lined up along their bottoms with the Align menu open, measured at 207.9 mm across

The Ruler menu: measure the size of the selection, the gaps to nearby parts, or margins

4 Shape it

Go far beyond blocks

The Tools tab is where models get interesting. Every tool shows a see-through preview that updates as you change its settings, and nothing changes until you press Apply. Esc leaves the model exactly as it was.

A sphere sculpted into a box, with the Sculpt menu and its blend setting

Melt two or more shapes into one smooth piece, like clay, with joins that flow instead of seams. Set how soft or sharp the blend is.

How it works ›

Formula presets to start from

Also in the Tools tab: Split an imported model into editable parts, Push face to add or remove material, Lay flat, and Align and mirror.

5 Check it prints

Know it will print before you waste filament

Built for the problems that actually ruin prints: parts that snap, parts that fuse, and parts you can’t see to fix.

A square flexi ring under the Flex test, with its result

Straight to your slicer, in colour

When it’s ready, the last few clicks:

Merge any holes into their solids.
Run Gaps on anything that moves, and Flex on anything that bends.
Lay flat: click a face and the part turns so that side is down.
Export 3MF to keep separate, named, coloured parts, or STL for one mesh that opens anywhere.
Open it in your slicer. It’s already in millimetres.