Watermark and sign a PDF without uploading it anywhere
Add a watermark, reorder pages, and drop a signature on any page — all processed privately in your browser.
CorePDF runs in your browser, so sensitive documents never leave your device. This guide covers watermarking and signing in one pass.
Step 1 — Open the PDF tool
From CorePDF, pick the operation you need — watermark, sign, merge, split, rotate, or compress. Your file is processed locally; nothing is uploaded to a server.
Step 2 — Add a watermark
Type your watermark text, then adjust opacity, tiling, and position. Keep opacity low enough to stay readable over content.
Step 3 — Place a signature and export
Draw, type, or upload a signature, then place and resize it on any page. Export the finished PDF and download it instantly.
FAQ
Are my files uploaded?+
No. CorePDF processes documents in your browser, so the file never leaves your device.
Will there be a watermark on my output?+
CorePath never adds its own watermark to your documents — only the watermark you choose to add.
Edit a PDF privately
Start free — no credit card required. Replace a stack of subscriptions with CorePath.