Browser CAD viewer for STEP, IGES, SolidWorks, Inventor, CATIA, DWG and mesh files, plus a Claude connector that inspects dimensions, volume and area and converts to STL, GLB or STEP. Pricing, the evidence and the alternatives, checked Oct 2026.
Closed source. No public repository.
New & indie Early tool, few public reviews yet. Badge drops once it builds a track record.
Browser CAD viewer for STEP, IGES, SolidWorks, Inventor, CATIA, DWG and mesh files, plus a Claude connector that inspects dimensions, volume and area and converts to STL, GLB or STEP.
Best for
Engineers, makers and buyers who need to open, measure or convert a CAD file without installing desktop CAD, or check one from a Claude chat.
Red flags
Free for now: viewing and measuring need no account, but converting needs sign-in, and a paid Conversion Pack ($5 for 50 conversions) is planned, so free limits may change; brand-new site (domain from Sep 2026) with an anonymous team and few public reviews; vignette ads on desktop pages; guest files are deleted after about 1 hour; ChatGPT version not public yet.
Price
$0 with these limitsView and measure without an account (95 MiB per file); conversions free for now with sign-inUpgrade: No paid plan yet; planned Conversion Pack $5 one-time for 50 conversions (not on sale yet)
Opening line: “Use CADProps to inspect a CAD file. Call inspect_cad and give me an upload link, then tell me the dimensions, volume and units.”
CADProps Connector: Browser CAD viewer for STEP, IGES, SolidWorks, Inventor, CATIA, DWG and mesh files, plus a Claude connector that inspects dimensions, volume and area and converts to STL, GLB or STEP. Best for engineers, makers and buyers who need to open, measure or convert a CAD file without installing desktop CAD, or check one from a Claude chat. Watch out for: free for now: viewing and measuring need no account, but converting needs sign-in, and a paid Conversion Pack ($5 for 50 conversions) is planned, so free limits may change; brand-new site (domain from Sep 2026) with an anonymous team and few public reviews; vignette ads on desktop pages; guest files are deleted after about 1 hour; ChatGPT version not public yet. Price: No paid plan yet; planned Conversion Pack $5 one-time for 50 conversions (not on sale yet) (free tier, checked Oct 2026).
Note: The web app opens 55+ CAD, mesh and 2D formats (76 extensions) up to 95 MiB per file and reads exact B-Rep geometry where it can, with mesh results marked approximate. The Claude connector is a remote MCP server (https://www.cadprops.com/api/v1/mcp, no sign-in) with inspect, convert and open-in-workspace tools; files go up through a one-time browser upload link. Everything is free within service limits today; signed-in accounts get 200 MB of saved files. The planned Conversion Pack is $5 for 50 successful conversions, valid 12 months, no auto-renewal. Says uploaded files are never used for AI training. Interface in 10 languages. Contact support@cadprops.com.
Free tier
Free
Job in a stack
Convert files, CAD viewer and Claude connector
Cheapest paid plan
Planned $5 Conversion Pack (50 conversions), not on sale yet
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Questions people ask
Is CADProps Connector free?
Free tier. Cheapest paid plan: No paid plan yet; planned Conversion Pack $5 one-time for 50 conversions (not on sale yet) (checked Oct 2026).
What is CADProps Connector best for?
Engineers, makers and buyers who need to open, measure or convert a CAD file without installing desktop CAD, or check one from a Claude chat.
What are the downsides of CADProps Connector?
Free for now: viewing and measuring need no account, but converting needs sign-in, and a paid Conversion Pack ($5 for 50 conversions) is planned, so free limits may change; brand-new site (domain from Sep 2026) with an anonymous team and few public reviews; vignette ads on desktop pages; guest files are deleted after about 1 hour; ChatGPT version not public yet.
What are the best CADProps Connector alternatives?