Interactive assembly instructions from your CAD
Upload a STEP assembly, stage each step with arrows, notes and photos, and share a link that works on any phone. No app to install, for you or your readers.
How it works
Upload your STEP
From any CAD tool. CadStage reads every part on its servers: your file never needs a plugin.
Stage each step
Show, hide, move and turn parts, add arrows, notes and photos. The assembly order mode builds a first draft for you.
Share a link
Release the guide and send its address or a QR code. Readers turn the model with a finger, step by step.
Made for builders and the people who ship to them
Phones first
A reader opens the link and follows along, with nothing to install.
Releases you can trust
Readers see the release you published; your next edits wait until you release them.
Every language
Write the guide once, translate its texts, and readers get it in theirs.
Embed anywhere
Put a guide on your store or documentation page with one line of HTML.
Private when needed
Unlisted or password-protected guides for customers and teams (paid plans).
See what readers do
Views, the steps reached and how many finish: no cookies, nothing personal kept.
Your next build deserves better instructions
Free for public guides. Upgrade when your team grows.