Add watermark

This tool draws a diagonal text watermark across each page of a PDF. It is intended for marking drafts, internal copies and documents you do not want reused without context.

Drag & drop files here

or Browse files

Max file size: 100 MB

Text or URL

Processed locally in your browser. Files are cleared when you leave the page.

Why use Add watermark?

PDF is the format people reach for when a document has to look identical everywhere — on a phone, on a colleague's laptop and on paper. Converting to or from PDF lets you keep that fixed layout for sharing and archiving while still being able to edit, split, merge or shrink the file when the job changes. Doing it in the browser means a contract, payslip or ID scan never has to be uploaded to a stranger's server just to change its format.

How to use Add watermark

1Upload the PDF.
2Type the watermark text, for example Confidential.
3Press Convert now.
4Download the watermarked document.

Features

Semi-transparent text is drawn over the existing content on every page.
Original page content stays intact underneath the mark.
No account or installation needed.

Supported formats

Input: PDF
Output: PDF

Your privacy

This tool runs entirely in your browser using JavaScript and WebAssembly. The file you select is read into your device's memory, converted there and offered back as a download — it is never uploaded to our servers. Closing or reloading the page clears it. If you are signed in, we store only the tool name, the number of files and their total size so you can see your own activity history; the file contents are never sent.

Read the full privacy policy

Tips for the best result

Check the page order in the file list before converting — pages are produced in the order shown.
Scanned pages photographed at an angle convert better if you crop them first; the tool preserves what it is given.
For very large PDFs, close other heavy browser tabs so the page has more memory to work with.
Open the finished PDF before sending it, especially for documents that have to print exactly.

Frequently asked questions

Can I use an image as the watermark?

Not currently. The tool supports text watermarks only.

Is the watermark permanent?

It is drawn into the page content, so it cannot be toggled off in a reader, though it is not a security feature and can be removed by editing software.