Upload a multi-page PDF. StampPDF analyzes each page individually — detects rotation, maps content zones, finds open space — and places your stamp where it actually belongs.
Used for exhibits, NDAs, approvals, and plan sets.
Files processed in memory, then deleted. Nothing stored.
Places your stamp at the same coordinates on every page. Works when every page is the same orientation and size. Breaks when they're not.
Rotation is detected per page. Content zones are mapped. Your stamp is placed in open space or an identified signature box — sized correctly for that page.
Any PDF, any page size. Contracts, plan sets, reports, permit packages.
Each page scanned individually. Rotation detected. Content zones mapped. Open space identified.
Auto-placed in the best open area or signature box. Click to reposition if needed.
Original content, layers, and metadata preserved. Ready to submit.
StampPDF doesn't overlay an image at fixed coordinates. It reads each page and decides where your stamp should go.
Detects 0°, 90°, 180°, and 270° rotation automatically. Stamps always appear upright in the displayed orientation.
Finds signature boxes and approval blocks in title blocks using render-based occupancy analysis.
Rasterizes each page, builds an occupancy mask, and finds the optimal empty rectangle for placement.
The entire document stamped at once. Mixed orientations, different layouts, different page sizes — one pass.
Stamps scale relative to page dimensions. Larger on D-size drawings, proportional on letter-size.
Define stamp coordinates for recurring formats. Set it once, reuse on every future file with the same layout.
Stamp PE seals across multi-sheet permit sets where jurisdictions require a seal on every page. Handles landscape engineering sheets with title block detection.
When you receive a PDF set and need to add your seal after the fact. No CAD source file, no xref option — just a PDF that needs stamps on every sheet.
Stamp NDAs, contracts, and exhibits without manually placing labels on every page. Handles multi-page documents automatically.
Add "APPROVED," "CONFIDENTIAL," or company seals to reports, proposals, and invoices in bulk.
We know you're working with client documents.
Files are processed in memory and deleted the moment your stamped PDF is generated.
We don't see your documents. No logging, no retention, no access after processing.
Upload, stamp, download. No signup, no email, no tracking.
Nothing is cached. If you need to re-stamp, you upload a fresh copy.
I started by watching engineers spend 15–20 minutes placing seals on multi-page PDFs — fixing rotation, adjusting placement, repeating the same steps over and over.
Then I started seeing the same thing in other workflows — contracts, exhibits, internal docs. Different files, same problem: placing something on every page shouldn't take that long.
StampPDF was built to automate that completely — upload a file and it just works.
If you have questions, feedback, or want to tell me I'm solving the wrong problem — I'd like to hear it.
Free during beta. No account required.