Watermark PDF
Stamp text or a logo across pages.
Stamp text or a logo across pages.
How to use Watermark PDF
- Upload your PDF and type the watermark text
- Set the font size, opacity, and diagonal or banded position
- Download the stamped PDF applied across every page
About Watermark PDF
Watermark PDF stamps custom text across every page of a document, so whether you want to mark a file DRAFT, CONFIDENTIAL, a company name, or a client's name, you can do it in a few clicks. Upload the PDF, type the words you want, and the tool lays them over the existing pages without disturbing the original text, images, or layout underneath.
From there you control how the mark looks. Set the font size and drag the opacity slider anywhere from 0 to 100% — a faint, low-opacity stamp sits quietly in the background, while a bolder, larger one reads as an overlay you can't miss. Choose where it lands, too: a diagonal watermark angled 45° through the center of the page, or a horizontal band along the top or bottom. Whatever you pick is applied to every page automatically, so a 50-page file takes the same effort as a single sheet.
It's built with pdf-lib and runs entirely in your browser. That means it's completely free, with no account, no sign-up, no usage limits, and no watermark of ours added to your work. It also means your file never leaves your device — the PDF is opened, stamped, and saved locally, so nothing is uploaded to a server or seen by anyone but you.
Frequently asked questions
- How do I add a watermark to my PDF?
- Upload your PDF, type the watermark text, then adjust the font size, opacity, and position. Click Add watermark and download the finished file. The text is applied to every page automatically.
- How do I make a watermark appear on every page of a PDF?
- Type your text once and it's stamped on every page in the file automatically — you don't place it page by page. A one-page memo and a fifty-page report take the same single click, and the position, size, and opacity you set apply throughout.
- Can I remove or delete a watermark from a PDF?
- No — this tool adds a text watermark, it doesn't take one out. Removing an existing watermark is a different job that depends on how the mark was embedded, and it usually can't be done cleanly without a dedicated PDF editor or redaction tool. This tool only handles stamping your own watermark on.
- Can I use my company name or a logo as the watermark?
- You can type any text you want — a company name, a client's name, DRAFT, CONFIDENTIAL, a date, or anything else. It's a text watermark, so image or logo files aren't placed; if you need a wordmark, type the name and set the font size to suit.
- Where can the watermark be placed on the page?
- You can choose a diagonal watermark angled 45° through the center of the page, or a horizontal watermark along the top or bottom. The chosen position is applied to every page in the PDF.
- Can I control how faint or bold the watermark looks?
- Yes. Use the opacity slider (0 to 100%) to make the mark subtle or prominent, and set any font size you like. Lower opacity works well for a background stamp; higher opacity and a larger size create a bold overlay.
- Will the watermark cover up my text or make the PDF unreadable?
- It doesn't have to. A diagonal center mark at moderate opacity stays see-through, so the page underneath is still readable. If it feels too heavy, lower the opacity or move it to the top or bottom band instead of the center.
- Does it change the rest of my PDF content?
- No. The tool only draws your text on top of the existing pages using pdf-lib. The original text, images, and layout are preserved — the watermark is simply added over each page.
- Is my PDF uploaded to a server?
- No. The tool runs entirely in your browser using JavaScript, so your PDF is opened, stamped, and saved locally on your own device. Nothing is ever uploaded, stored, or seen by us.
- Is the Watermark PDF tool free?
- Yes, it's 100% free with no account, no sign-up, and no usage limits. You can watermark as many PDFs as you like, and we never add a watermark of our own.