Add a watermark to a PDF without uploading it
Marking a document as a draft, confidential, or belonging to a particular business is a common reason to stamp a watermark across a PDF before sharing it. This tool does that directly inside your browser — your document is never sent to a server, and you can adjust the text, size, and visibility before applying it.
How it works
- Choose your PDF. Drag it in or tap to select it from your device.
- Set the watermark text. Type whatever text you want stamped across every page.
- Adjust size and opacity. Fine-tune how bold or subtle the watermark appears.
- Apply and download. Save the watermarked version of your PDF.
Common uses
- Marking a document as "DRAFT" before it's finalized.
- Stamping "CONFIDENTIAL" across sensitive internal paperwork.
- Adding a company name or logo text across shared materials.
- Labeling a sample or preview document before a final version is delivered.
Choosing the right opacity
A lower opacity (around 10–20%) keeps the underlying document fully readable while still making the watermark clearly visible — a common choice for professional documents. A higher opacity makes the watermark bolder and harder to miss, which can be useful for drafts or internal-only materials where making the status obvious matters more than a clean look.
Your document never leaves your device
Because the watermark is applied locally, this tool never sees or stores the document you use here. See our Privacy Policy for full details on how QuickZeta handles data.
No quality loss to the original document
The watermark is added as an additional layer on top of each page — the original text, images, and formatting underneath are left completely untouched. This means the rest of the document keeps its original quality and remains fully readable, with only the watermark text layered visibly on top at whatever opacity you choose — the file remains a genuine, working PDF afterward, not a flattened image.
Frequently asked questions
+Is this PDF watermark tool really free, with no sign up?
Yes. There's no account and no limit on how many PDFs you can watermark.
+Do you upload my PDF to a server?
No. The watermark is stamped directly inside your browser — your file is never sent anywhere.
+Can I customize the watermark text?
Yes — type whatever text you'd like, whether that's "CONFIDENTIAL," "DRAFT," a company name, or anything else.
+Can I control how visible the watermark is?
Yes — the opacity slider controls how faint or bold the watermark appears, and the font size slider controls how large it renders across the page.
+Does the watermark cover important content?
The watermark is stamped diagonally across the center of each page at an adjustable opacity, so it's visible as a watermark without necessarily blocking the underlying text — lowering the opacity further makes it subtler if needed.
+Will this work with a password-protected PDF?
Not currently — the PDF needs to be unlocked first. If a file fails to load, that's usually why.