Compare PDF Drawings
See what changed between two revisions of a drawing. Lay the old sheet over the new one: what was removed shows in red, what was added shows in blue.
More PDF tools
- OCR PDF — Make a scanned PDF searchable and copyable.
- Merge — Combine several PDFs into one, in the order you choose.
- Split — Turn every page, or the pages you pick, into separate PDFs.
- PDF → Word — Get the text, tables and pictures of a PDF into an editable Word document.
- PDF → Excel — Turn tables and BoQs in a PDF into an Excel spreadsheet.
Questions
How do I compare two PDF drawings?
Choose the old revision and the new revision, pick the sheet in each, and the two are laid on top of each other. Removed items show in red, added items in blue, and unchanged items in grey.
Does it compare text or the drawing?
The drawing itself, as it looks on the page — lines, hatching, dimensions and text alike. It works on CAD drawings and on scans, as long as both sheets are at the same scale and position.
Can I save the comparison?
Yes. Download the overlay as an image to attach to an RFI, a variation or an email.
Are my files uploaded to a server?
No. Everything happens inside your browser on your own device. Your files are never uploaded, stored or seen by anyone.