Free tools for CAD and engineering work.
Compare reports, review P&ID configuration and prepare PDFs. Choose a task below, or explore the ACC Bridge extension and Component Studio.
The five file tools process selected files in your browser, without uploading their contents. No account is needed for those tools. ACC Bridge and Component Studio have their own requirements, explained on their pages.
Excel Compare
Compare spreadsheet revisions
Match Excel or CSV records by key, find changed, added and removed rows, and download the differences.
Browser tool · Local file processing
P&ID Class Audit
Understand your project configuration
Explore Plant 3D P&ID classes, properties and inheritance. Compare saved project configurations and export findings.
Browser tool · Local file processing
PDF Annotator
Put tag data on your P&ID PDF
Match spreadsheet tags to searchable PDF text, add highlights and popup notes, and review unmatched tags.
Browser tool · Local file processing
P&ID Linker
Connect a component list and drawing
Create a PDF with links from list rows to P&ID tags and back, using your spreadsheet and searchable drawing.
Browser tool · Local file processing
PDF Organizer
Prepare the PDF you need
Merge, split, rotate and reorder PDF pages on your device, then download a new file.
Browser tool · Local file processing
ACC Bridge
Keep selected model properties in view
Use the free Chrome extension with ACC Model Coordination, ACC Docs and Autodesk Viewer. Navigation into Plant 3D requires a valid RKCadTools licence.
Free browser extension
Build Plant 3D components in Component Studio.
Explore the browser-based component editor and its model library. A free RKCadTools account is required for Python export. Your existing account can also be used on this website; register your company in My Account when you want to purchase Plant 3D plugin licences.
Working with Excel inside Plant 3D?
Use RKCadTools Data Manager to export project data, edit allowed properties in Excel and review imported changes before accepting them.
Excel import and export for AutoCAD Plant 3D → Download the free 15-day trial →