About this watermark pdf
Stamp a diagonal text watermark, such as "DRAFT" or "CONFIDENTIAL", across every page of a PDF, right in your browser. Enter the watermark text, choose its size and opacity, and this tool draws it once per page at a 45-degree angle, centered on the page, before saving a new PDF. Lower opacity keeps the original content readable underneath the stamp. Use this workspace to prepare a result you can review before putting it to use. All processing takes place on your device, without an account or an upload of your inputs. Check the examples to understand the expected output, read the limitations for the supported scope, and reset the form when you want to start a separate task.
How the watermark pdf works
Draws your watermark text once per page, rotated 45 degrees and centered, at the font size and opacity you choose, then saves a new PDF.
Watermark PDF examples
"DRAFT"; 60pt; 25% opacity
Every page shows a faint diagonal "DRAFT" stamp
"CONFIDENTIAL"; 36pt; 15% opacity
A subtle diagonal watermark on every page
Limitations & privacy
One nonempty PDF up to 20 MB and 200 pages. Watermark text supports standard Latin characters only, up to 60 characters, and is drawn identically on every page — it cannot vary per page or follow existing page rotation. Encrypted PDFs are unsupported, and rewriting invalidates digital signatures.
Inputs and results stay in this browser. Only tool identifiers are stored for your recently used tools. You can clear that history from the directory.
Watermark PDF: frequently asked questions
How does the watermark pdf work?
Draws your watermark text once per page, rotated 45 degrees and centered, at the font size and opacity you choose, then saves a new PDF.
What can I inspect in the watermark pdf result?
The watermark on each page helps you check the result before using it. One nonempty PDF up to 20 MB and 200 pages. Watermark text supports standard Latin characters only, up to 60 characters, and is drawn identically on every page — it cannot vary per page or follow existing page rotation. Encrypted PDFs are unsupported, and rewriting invalidates digital signatures.
Does the watermark pdf upload my input?
Processing happens in your browser. No tool input or output is uploaded to a server. Use Reset to clear the current workspace before starting a separate task.
Updated September 20, 2026