About a PDF Watermark

A PDF watermark is a semi-transparent text overlay placed on every page of a document. It is commonly used to indicate ownership, mark documents as drafts or confidential, or discourage unauthorized copying. This tool lets you add customizable text watermarks directly in your browser without installing any software. You can adjust the position, size, rotation angle, opacity, and color to match your exact needs.

User Guide

Drag and drop a PDF file or click the upload area to select one
Enter the text you want as a watermark
Click a position on the 9-point grid to place the watermark
Use the sliders to adjust font size, rotation, and opacity
Pick a color from the presets or use the custom color picker
Check the live preview, then click "Download" to save

Core Features

Free-form text input for any watermark message
9-position grid (top/middle/bottom combined with left/center/right)
Font size adjustable from 12pt to 120pt
Rotation from -90 degrees to +90 degrees
Opacity control from 5% to 100% for fine-tuning visibility
Preset color buttons plus a custom color picker
Live preview that updates as you adjust settings
Watermark applied uniformly across all pages

When This Comes in Handy

Marking sensitive documents with "CONFIDENTIAL" or "INTERNAL USE ONLY"
Labeling draft versions with "DRAFT" or "FOR REVIEW"
Adding company name or author name for copyright protection
Stamping sample materials with "SAMPLE" or "SPECIMEN"
Branding proposals or invoices with your organization name
Indicating document status such as "APPROVED" or "PENDING"

Common Questions

Q: Does adding a watermark modify the original file?

No. The original file stays untouched. A new PDF with the watermark is created separately for download.

Q: Can the watermark be removed later?

Watermarks added by this tool are drawn directly onto the PDF content, so they cannot be easily removed with standard tools. Keep a copy of the original file.

Q: Is the same watermark applied to every page?

Yes, the current version applies identical watermark settings to all pages in the document.

Q: Can I add an image watermark?

Currently only text watermarks are supported. For logo or image watermarks, use a dedicated tool.

Q: What opacity level works best?

Typically 20% to 40% provides a good balance. Too low and the content beneath becomes hard to read. Too high and the watermark may be barely visible.

Q: Are files uploaded to a server?

No. All processing happens in your browser. Files are never transmitted to any external server, making it safe for confidential documents.

Q: Can I position the watermark freely?

You can choose from 9 positions (combinations of top/middle/bottom and left/center/right). Precise coordinate input is not available.

Q: Is there a file size limit?

Since there is no server upload, there is no strict limit. Very large files may process more slowly depending on your browser memory.

Q: Can I use non-English text?

The built-in font is Helvetica, which supports standard Latin characters. Non-Latin text may display differently across PDF viewers.

Q: Does it work on mobile devices?

Yes, it works in mobile browsers. All controls including sliders and position selection are fully functional on touch screens.

Add PDF Watermark

About PDF Watermark