Are my PDFs uploaded?

No — all PDF processing runs in your browser using PDF-lib and PDF.js. Files never leave your device.

Can I edit existing text in a PDF?

You can cover existing text with a Whiteout rectangle and add new text on top using the Text tool. True reflowing of existing PDF text requires server-side rendering which is not available in browser-only tools.

What is the maximum PDF size?

Up to 50MB per PDF file. All processing happens locally in your browser.

How many pages can a PDF have?

There is no page limit for compress, rotate, watermark, and merge operations. PDF to image conversion supports up to 50 pages due to browser memory constraints.

pdf-tools

Add Watermark to PDF

Add text or image watermarks to PDF pages online free. Customize position, opacity, and rotation. Browser-based. Free, no upload, instant results in your browse

✓ Free⚡ Instant🔒 Private

No. All PDF processing runs entirely in your browser using PDF-lib and PDF.js. Your files never leave your device.

Yes — completely free, no account, no watermark, no upload required.

Drop image here

or click to browse · Paste with Ctrl+V

PDF files only

Max 50 MB · Processed locally · Zero uploads

Settings

Watermark Text

Opacity30%

Rotation-45°

Text Color

Processing…

Change

smaller

Extracted Text

PreviewTap images to zoom

ORIGINAL

Original

RESULT

Result appears here

How to Use

Upload your PDF.

Enter your watermark text (e.g. CONFIDENTIAL, DRAFT).

Set opacity, rotation, and color.

Download watermarked PDF.

Quick Answer

Add Watermark to PDF: free, browser-based tool — Add text or image watermarks to PDF pages online free. Customize position, opacity, and rotation. Browser-based. Free, no upload, instant results in your browse No upload required, works instantly on any device.

Frequently Asked Questions

Currently only text watermarks are supported. For image watermarks, convert PDF to images first, add watermark, then convert back.