The engineer that checks its own work.
Describe an engine part, a gear or a bracket. Say what it must do once. NitoCAD builds it, checks every version against that, and answers PASS, FAIL or UNKNOWN. Never a guess.
- 01Requirements stay attached and are re-checked on every version
- 02PASS, FAIL or UNKNOWN. UNKNOWN is never shown as a pass
- 03A failed build is refunded, not charged
- 04Mechanical, automotive, aerospace, civil, buildings, circuits
Whole engines, not just parts.
Pick one and it opens in the live model above, with the cutaway to look inside.
Say what it must do. It keeps checking.
Say “fits in 100 × 80 × 60 mm” or “under 200 g” once. Every new version is measured against it, so an edit that quietly breaks an earlier requirement is caught when it is built, not when the part arrives.
UNKNOWN means NitoCAD could not measure it. It is never reported as a pass.
Try it now
Describe a part and get a free 3D preview right here. Sign in to open CAD Studio, where you build, change and export the full files.
Set it. Prove it. Take it.
From a sentence to a file you can send to the shop.
Describe the part and what it must do
Dimensions stay exactly as you wrote them. Or attach a STEP file, a DXF or a sketch.
Verified before it is delivered
NitoCAD checks the solid is valid, then your requirements, then CNC, sheet metal, molding and 3D printing. If a build fails, you are not charged.
Files the shop can use
STEP, STL, IGES, DXF, PDF, GLB, 3MF or URDF. Optionally anchor the design on BOT Chain as a record of what you made.
One engineer. Six disciplines.
Each one is honest about where it stops.
Mechanical
Engine parts, gears, shafts, brackets, enclosures and assemblies. Fits and tolerances, manufacturability, overlap and mass checks.
Limit Checks use typical shop guidelines, not your shop’s limits.
Automotive
Wheel hubs, brake rotors, control arms, steering knuckles, pistons and flywheels.
Limit A recognised bolt pattern is not a fitment claim.
Aerospace
Airfoils, stability, engine cycle, mass and CG, with a signed review trail.
Limit Ends at “ready for engineering review”. Never certification.
Civil
Survey surfaces, alignments, earthworks, drainage and retaining wall stability.
Limit Screening level. The limits are yours to set.
Buildings
Layouts, structure, schedules, drawing sets and rule checks.
Limit Conceptual rules only. Never reports a full code pass.
Circuits
Place and route a board, then export a KiCad project and Gerbers.
Limit A light design-rule check. Run a full one before you order boards.
Why engineers use it
Say what the part must do. NitoCAD keeps it true as you change it.
Your numbers stay yours
Every value you type is kept exactly as written. If NitoCAD sees a problem with a dimension, it flags it and leaves the value alone.
Unknown stays unknown
When NitoCAD cannot measure something or an input is missing, it says so. It never fills the gap and calls it a pass.
No charge for a failed build
Preview every part free. If a generation fails, it does not count against your plan.
- 01Free STL preview, no wallet required
- 02STEP, IGES, DXF and PDF in every plan
- 03Callable by AI agents over MCP on BOT Chain
- 04On-chain design provenance
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Unlimited chats and projects, Standard and Expert AI, and an allowance that resets every week.
See ProEverything in Pro, our most capable Expert model and a much larger weekly allowance.
See MaxSubscriptions are billed in US dollars by card. You can also add AI usage with BOT inside CAD Studio. Failed builds do not count against your plan. Full pricing