Runs entirely in your browser
Add watermark to PDF
Stamp a custom text watermark onto PDF pages on your device — nothing is uploaded to a server. Drop one or more PDF files, style your watermark, and download the result.
Drag & drop PDF files here
or use the button below · multiple files supported · .pdf only
MAX 50MB PER FILE · PASSWORD-PROTECTED PDFs ARE NOT SUPPORTED, REMOVE THE PASSWORD FIRST
What Is Add Watermark to PDF?
Watermarking a PDF stamps text — like "CONFIDENTIAL," "DRAFT," or a company name — across the pages, either as a single mark or repeated diagonally over the whole document. It's a common way to label a document's status or discourage unauthorized copying, without altering the underlying content.
This tool reads your PDF directly in your browser, draws the watermark text you choose onto the pages you select, and rebuilds the file — all without uploading anything to a server.
Why Use Our Watermark PDF Tool?
Most online watermarking tools ask you to upload your file to a remote server, wait in a queue, and trust that it's deleted afterward. This tool takes a different approach: reading the PDF and stamping the watermark both happen inside your own browser tab using JavaScript libraries. Your document never leaves your device.
- No account or sign-up: open the page and start watermarking immediately.
- No file uploads: nothing is transmitted to a server for processing.
- No paid API: watermarking runs on free, open client-side libraries.
- No hidden limits: watermark as many PDFs as you like.
Key Features of Our Watermark PDF Tool
Custom text watermark
Type any text — a status label, company name, or confidentiality notice — to stamp onto your pages.
Tiled or single placement
Repeat the watermark diagonally across the whole page, or place a single stamp in a corner or the center.
Color, size, and opacity control
Pick the exact color, font size, and transparency so the watermark is as bold or as subtle as you need.
Adjustable rotation
Angle the watermark text from -180° to 180° to match the classic diagonal stamp look or keep it flat.
Custom page range
Watermark every page by default, or enter a range like 1-3,5 to stamp only the pages that need it.
Live watermark preview
See the watermark reflected in each file's thumbnail before you convert, so you can confirm it looks right.
Batch processing
Queue up several PDFs and watermark them all in one pass with the same settings.
Automatic ZIP bundling
Watermarking more than one file at once automatically packages the results into a single .zip download.
Benefits of Using Add Watermark to PDF
- Mark document status: label drafts, copies, or confidential material at a glance.
- Stay private: in-browser processing means your documents never touch a third-party server.
- Discourage misuse: a visible watermark makes unauthorized redistribution obvious.
- Save time: stamp a whole document in seconds instead of editing each page by hand.
- No software to install: everything runs in the browser you already have open.
How to Use Add Watermark to PDF?
- Add your PDF. Drag and drop one or more PDF files onto the drop area, or click "Browse files" to select them.
- Enter your watermark text. Type the label you want stamped onto the pages.
- Style it. Choose a position, color, opacity, font size, and rotation, plus an optional page range.
- Check the preview. Each file's thumbnail updates to show the watermark as configured.
- Click "Add Watermark." Each file is rebuilt with the watermark stamped on, entirely on your device.
- Download your results. Use the download button in the summary window that appears — a single PDF, or a .zip if you watermarked more than one.
Supported File Formats
| Format | Direction | Notes |
|---|---|---|
| PDF (.pdf) | Input | Standard, unencrypted PDF files. |
| PDF (.pdf) | Output | Your original PDF with the watermark stamped onto the selected pages. |
| ZIP (.zip) | Output | Automatically offered whenever more than one file is watermarked at once. |
Why Choose Our Online PDF Tool?
There's no shortage of PDF watermarking tools online, but many route your file through a server, require a paid plan, or limit how many files you can process per day. This tool is built around a simpler premise: watermark entirely on your device using free, open libraries — no paid conversion API involved — and stay free to use without a login.
Privacy and Security
Because watermarking happens client-side, your PDF is read directly into your browser's memory, stamped there, and written back out as a new file — at no point is the file content sent to a server operated by this site or anyone else.
Common Use Cases
- Marking drafts so reviewers can tell a work-in-progress from a final version.
- Labeling confidential documents before sharing them internally or externally.
- Branding shared PDFs with a company name or logo text.
- Protecting sample content like previews, proofs, or portfolios from casual reuse.
Frequently Asked Questions
Is this watermark tool really free?
Yes. There's no sign-up, no per-file fee, and no extra watermark added beyond the one you configure.
Are my files uploaded to a server?
No. Reading the PDF and rebuilding the watermarked version both run inside your browser using JavaScript. Your document is never transmitted anywhere for processing.
Can I remove a watermark added by this tool?
Watermarks added this way become part of the page content, similar to other watermarking tools, so they can't be removed by this tool afterward. Keep a copy of your original file if you may need an unmarked version later.
Can I watermark just some pages instead of the whole document?
Yes. Enter a page range such as "1-3,5" in the page range field before converting. Leave it blank to watermark every page in the document.
Can it watermark password-protected PDFs?
No. Files that require a password to open are not supported — remove the password with a PDF unlock tool first, then watermark the result.
How do I make the watermark less noticeable?
Lower the opacity slider — a value around 10-20% keeps the watermark visible without overwhelming the page content.
Is there a limit to how many files I can watermark?
No daily limit is enforced. The practical limits are your device's memory and the 50MB-per-file size cap, which keeps in-browser processing responsive.
Conclusion
Labeling a document shouldn't require design software or uploading it to an unknown server. This tool aims to make watermarking fast, private, and free — reading and rebuilding your document entirely on your own device, from a single file to a full batch.