Stamp a repeating label like DRAFT or CONFIDENTIAL across every page, with adjustable position, opacity and size.
Center, diagonal or corner positions
Adjustable opacity and font size
100% private — runs on your device
Upload a PDF
Type your watermark and pick options
Click Apply and download
Can I add an image watermark?
Watermark PDF adds text watermarks; place an image with Quick Sign instead.
Is it private?
Yes — watermarking runs in your browser.
Open the tool and get started — your file stays on your device.
The private, fast PDF toolkit for people who won't upload a signed contract to someone else's server. No upload. Free to start.
Most tools — merge, split, compress, rotate, add text and page numbers, watermark, OCR, quick sign, image to/from PDF, password protect and remove password — run entirely in your browser, so files are processed locally and never sent to our servers. There is nothing to store, leak, or retain for those tools. A few clearly-labeled tools are different by design: PDF to DOCX and Chat with PDF send your document's content to a secure AI service, and Request Signatures (Inkwell Sign, our hosted e-signature tool) stores your document so the recipient can sign from a private link. We tell you plainly when a tool isn't fully on-device.
Built for privacy-conscious individuals, students, and small teams who'd rather not hand a signed contract or tax statement to someone else's server. Not built for enterprise document-management workflows or large-scale e-signature platforms.
Free: merge up to 3 files once/day. Standard: $5/month or $48/year (about $4/month billed annually) — 5x daily usage across tools plus cloud import. Pro: $15/month or $149/year (about $12.42/month billed annually) — unlimited usage across all tools, plus sending PDFs for e-signature. Cancel anytime. Payments are processed securely via Stripe.
Start free — merge a PDF · See pricing · Browse all tools