Start with what you have
Specs, drawings, STEP, IGES, Parasolid, or native SLDPRT — PartProof reads what you already have.
PartProof Verified CAD Automation
Build CAD.
Prove it.
Turn specs, drawings, and STEP imports into editable SOLIDWORKS features you can defend in design review. Runs locally. Every change is traced.
Free during beta · Runs locally as a SOLIDWORKS add-in · No account, no cloud upload
How it works
From engineering intent to verified CAD evidence.
Not another black-box CAD AI. Every feature PartProof adds is a normal SOLIDWORKS feature you can edit, roll back, or delete — with a trace of how it got there.
Get real CAD features
Extrudes, revolves, cuts, holes, fillets — the same primitives you would build by hand in SOLIDWORKS. Edit, roll back, or delete like any normal feature.
Validate against your tolerances
Every feature is checked against your model dimensions, tolerances, and GD&T callouts before it is handed back.
Hand review a proof trace
Every run leaves a proof trace: what changed, what was checked, what passed.
FAQ
Questions engineers ask first.
What is PartProof?
PartProof is a SOLIDWORKS add-in that turns specs, drawings, and STEP imports into editable CAD features — and validates every feature it adds against your dimensions, tolerances, and GD&T callouts. Every run leaves a proof trace you can hand to design review.
Is the beta free?
Yes. PartProof itself is completely free during the beta — no license, no credit card, no usage limits, no expiry. Download the build from GitHub releases and use Discord for setup help, bug reports, and workflow requests.
Do I need a Codex or Claude Code subscription?
Yes. PartProof is the proof and validation layer — it talks to your own Codex CLI or Claude Code subscription for the AI side. You control the model, the cost, and the conversation. PartProof never bills you for AI tokens, never holds your credentials, and you can switch between Codex and Claude per session.
Where does my CAD data go?
Nowhere. PartProof installs as a local SOLIDWORKS add-in and runs on your machine. No account, no cloud upload, no telemetry of your geometry. You keep your IP.
Beta access
Run the free beta on a real model. See if PartProof earns a spot in your workflow.
The beta is free for engineers who want CAD automation they can actually defend in design review — with the validation evidence to back it up. Practical feedback shapes the next release.
100% free during the beta. No license, no credit card, no usage limits.
Installs as a SOLIDWORKS task-pane add-in. Requires SOLIDWORKS 2024 SP0+ on Windows 10/11.
Runs locally — no account, no cloud upload, your geometry never leaves your machine.