Fixers
Fix what broke.
A photo and two measurements. A knob that fits.
3D design that knows printing.
Start simply, grow into real parametric CAD, and make things that move.
Start designing
Free in your browser. No sign-up to start.
One 3D app. Every maker.
Easy for toys. Precise for real engineering.
Toy makers
Toys that move.
Joints that print in place.
Builders
Parts that fit.
Holes, rounds, exact sizes.
Parents and kids
Learn by making.
Step-by-step videos, from a first part.
Engineers
Real CAD underneath.
Edit and reorder every step.
ExtrudeCutHoleRoundShellLoftSweepSpinPatternMirrorSTEP3MF
Sharers
Send a link. Get remixes.
Share with a free account. Anyone can open it.
Print it
It knows printing.
It catches the fail before your printer does: parts that collide as they move, walls too thin for your nozzle, a better way up.
Opens inBambu StudioOrcaSlicerCura
Check0.4 mm nozzle
- Lid hits Box as it opensClick to see that moment.
- Wall too thinUnder two nozzle widths won’t print.0.6 mm
- SupportPrint upside down · no support6.6 cm²
- WaterHolds water up to 48 mm.
- ScrewdriversOnly one under 85 mm reaches.
Learn it
Design it yourself. Step by step.
Short videos, from your first part to parts that move. Then design with AI.
Your first part
Holes and smooth edges
Soft shapes with Blob
Parts that move
Fix it
Broken this afternoon.
Fixed by dinner.
A photo and two measurements is all it needs.
Knob’s missing. Shaft 6.2 mm, flat 4.8 mm.
Drag a size. The knob follows.
Every measurement is a slider. Get it to fit, then print.
Adjust
Build it
Pencil in.
Precise part out.
Your sketch, or an old drawing from the files.
- 50 × 45 × 32
- Millimetres, as drawn
- 4 mm
- Plate, with gussets
- 2 × M3
- Countersunk holes
- 4 × Ø2.7
- Servo horn, on Ø16
Ask for it.
Then change it.
Say what’s wrong. It changes the model, not just the picture.
Prefer your own AI? Claude, ChatGPT and other MCP apps can build in Extrudle too. How
Make the holes 0.3 mm bigger.
Make it dance
Draw a line. It bends.
Shape a creature from soft blobs, draw a line along it, and joints follow its shape. They print in place.
Not just toys.
- A hinge on a box lid.
- A clip on a case.
- A slide in a drawer.
Post it
Every model gets its own video.
Printed layer by layer, then dancing on the beat.
- Printing
- Wiggling
- Shaken
- Swimming
- Dancing
Silk
Gold
Glow
Rainbow
Plans
Start free. Keep it free.
Free forever
£0
- Personal and hobby use
- Unlimited designing, with every tool
- Moving parts that print in one piece
- A check that it will print and fit
- Export STL, 3MF and STEP
- Remix designs from the Library
- Share links
- 10 projects in the cloud, unlimited on your computer
- A chat that shows you how to make it and checks your model
Maker
Everything free, plus:
- Sell what you make
- Your designs stay private
- No watermark on videos
- Unlimited projects, saved in the cloud
- Our AI builds it for you
- Unlimited use of your own AI (MCP)
Questions
Good to know.
Which plan should I get?
Free if you want a full design tool for personal and hobby use, and to learn to design things yourself, with a chat that shows you how. It's free forever.
Maker if you'd like the AI to build things for you, your designs kept private, videos without the watermark, to sell what you make, or to design with your own AI (Claude, ChatGPT and others) as much as you like. Pay monthly or yearly, or once for life: Lifetime is for the first 500 only.
What does the free chat do?
It shows you how to make things yourself: the plan, then each step and the buttons to click. Ask what's wrong with your model and it looks and says what to change. It doesn't build for you: on Maker, the AI does.
How quickly is the AI used, and can I buy more?
It depends on the design. What the AI built in charged to make these:
A shelf bracketabout £0.10
A remote caddyabout £0.10
A flexible T. rexabout £0.20
A flexible geckoabout £0.25
So £10 of AI makes about 100 designs like the bracket or 40 like the gecko. Changes you ask for afterwards and higher reasoning use more. Each reply shows what it cost.
When you need more, top up £5 at a time on Maker; top-ups are kept until spent.
How does the AI credit work?
Maker comes with AI to start, once per account. Renewing, or cancelling and rejoining, adds no more.
Move up while you're on Maker and you get the difference: from monthly to yearly, £15 more.
Your credit and top-ups can be spent only while you're on Maker.
Can I use my own AI?
On Maker, yes: connect Claude, ChatGPT, Claude Code or Cursor to your open Extrudle tab (Connect your AI… in the project menu). It builds in the app with the same tools as the AI built in, as much as you like, and your own AI's plan pays for its thinking.
ChatGPT needs Plus or above; Claude's free plan allows one connector, but its limits run out quickly. A plan of about £18 a month, such as Claude Pro or ChatGPT Plus, is plenty to start. Right now Claude Opus 5.5 and GPT-6.1 Sol work about equally well; medium reasoning suits most designs, higher for big designs with many parts.
Do I need an account?
Not to start: design, check and export without signing up. Saving, sharing and the AI need a free account, which keeps 10 projects online, on any device, and saves any number to your computer; Maker keeps as many online as you like.
What age is it for?
Anyone can design without an account. Accounts are for 13 and over; younger children use Extrudle with a parent.
Are my designs private?
On Maker, yes. On a free account we may feature designs you save. Designs saved while on Maker stay private even if you stop.
Can I sell what I make?
On Maker, yes, for designs you made yourself: prints, the files, or products made with them. Library designs and other people's aren't yours to sell. A free account is for personal use.
Which printers and files does it work with?
Any. Export 3MF, STL or STEP for your slicer (Bambu Studio, PrusaSlicer, Cura and the rest). Import STL, 3MF, OBJ, GLB and STEP models, and SVG or DXF drawings.
What does Lifetime include?
Everything in Maker, for good, with £50 of AI to start, for one payment. It's for the first 500 only.
What happens if I cancel?
Your plan runs to the end of what you've paid for, then you're on a free account. Your projects stay, and your AI credit and top-ups wait until you're back on Maker.
Can I get a refund?
Changed your mind? Full refund within 14 days, minus any AI you've used. After that, monthly and yearly plans run to the end of the period. Lifetime has no refund after 14 days. Unspent top-ups are refunded. The full rules are in the terms.