How to add the watermark
Use the editor above. After you pick a PDF, the preview shows the first page with your current settings. Download writes the same settings onto every page. If you need CONFIDENTIAL, DRAFT, SAMPLE, or DO NOT COPY, pick the preset; otherwise type custom text up to 50 characters.
Single mark vs tiled mark
A single centered watermark is enough for most internal drafts. Turn on repeat when you are sending a copy to someone who might crop a page or photograph one paragraph. Tiling places the phrase on a grid so a cropped snippet still shows the mark.
What this does not do
A watermark is not encryption and it is not a digital signature. Anyone can still copy the file. It also cannot watermark Word, Excel, or PowerPoint directly: export those files to PDF first, then mark the PDF. If the PDF is digitally signed, adding a watermark will invalidate the signature. See the signed-PDF guide before you proceed.
Tips
- Red at 20–30% opacity is the usual confidential look; gray is better for drafts.
- If the preview looks right, the download will match it on every page.
Frequently asked questions
Can I add a watermark without Adobe Acrobat?
Yes. This tool runs in Chrome, Edge, Firefox, and Safari. Acrobat Pro is not required.
Will the original file be changed?
No. You download a new PDF. The file you selected is not overwritten.
If you need platform-specific steps for Acrobat, Mac Preview, or a phone, open the matching how-to guide from the related pages below.
Add watermark nowRelated pages
How to add a watermark to a PDF
How to add a watermark to a PDF: free browser tool, Acrobat Pro, Word export, and Mac Preview. Steps, limits, and when to use each method. No upload here.
Free PDF watermark tool
Free PDF watermark tool. No account, no page cap, no file upload. Add text watermarks in your browser. Files never leave your device. Download instantly.
Add a confidential watermark to a PDF
Add a CONFIDENTIAL watermark to a PDF online. Free, no account, no upload. Red diagonal text on every page. Built for contracts and internal files.
Add a draft watermark to a PDF
Add a DRAFT watermark to a PDF online. Free, no account, no file upload. Marks every page so reviewers do not treat an unfinished file as final.
Watermark a PDF online
Watermark a PDF online with no install and no upload. Works in Chrome, Edge, Firefox, and Safari on Windows, Mac, and Linux. Files stay in this browser.
Watermark a PDF in your browser
Add a text watermark to a PDF online. Free, no account, no file upload. Files stay in your browser. Set text, opacity, and position on every page.
Batch watermark PDF files
Batch watermark PDF files online. Free, no account, no upload. Apply the same text to several PDFs in your browser and download each marked file.
Add a “do not copy” watermark to a PDF
Add a DO NOT COPY watermark to a PDF online. Free, no account, no upload. Tiled text on every page as a visual deterrent for review copies you share.
Add a sample watermark to a PDF
Add a SAMPLE watermark to a PDF online. Free, no account, no file upload. Label client previews, exam copies, and portfolio pages on every page.
Add a stamp to a PDF
Add a text stamp to a PDF online. Free, no account, no upload. PAID, APPROVED, RECEIVED, or custom wording on every page as selectable vector text.