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Private by design · 100% on-device

Watermark a PDF

Stamp a diagonal text watermark across every page. Choose the text, opacity, size, and angle, then download — no uploads, no sign-up, no watermark from us.

Drop a PDF to watermark

Stamp text like DRAFT or CONFIDENTIAL diagonally across every page.

  • No uploads
  • No sign-up
  • No watermark
  • Works offline

How it works

How to watermark a PDF

Three quick steps, all in your browser. Your file never leaves your device.

  1. 01

    Add your PDF

    Drop a PDF into the box above. It loads straight into your browser — nothing is uploaded to a server.

  2. 02

    Set your text

    Type the watermark text and adjust the size, opacity, and angle until it looks right.

  3. 03

    Stamp and download

    Click Add watermark and save the result. The only watermark on your file is the one you chose.

Features

Everything the watermark tool does

One focused tool for stamping text across a document — without a subscription or a single upload.

Any text you want

Stamp DRAFT, CONFIDENTIAL, a name, or a date — whatever the document needs.

Adjustable opacity

Slide from a faint background tint to a bold overlay so the mark never hides your content.

Custom angle and size

Rotate the text diagonally and size it to span the page, the classic watermark look.

Every page covered

The watermark is centered and applied across all pages in a single pass.

Private by design

The watermark is drawn in your browser's memory — your document is never uploaded.

Works offline

Once loaded, the tool keeps working with no network connection.

Privacy

Your PDF never leaves your device

Most online tools upload your file to a server to watermark it — and many stamp their own brand on top. PDFNEO works locally and adds only your text.

Watermark a PDF now

PDFNEO

  • Draws the watermark in your browser
  • No file is ever uploaded to a server
  • No account, email, or sign-up required
  • Adds only your text — never our brand

Typical cloud tools

  • Upload every document to a remote server
  • Often require an account to edit or save
  • May add their own watermark or limits
  • Leave copies of your files in the cloud

Use cases

When to watermark a PDF

A clear watermark signals status and ownership at a glance — here is where it helps.

  • Mark a document as DRAFT before review
  • Stamp CONFIDENTIAL on sensitive files
  • Add a company name across shared pages
  • Label a sample or proof copy
  • Mark a file as a copy, not the original
  • Brand a handout with an event or date

Keep going

Other PDF tools you might need

Keep working privately. Every PDFNEO tool runs in your browser with no uploads.

Protect PDF

Encrypt a PDF with a password so only people you trust can open it — all in your browser.

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Add Page Numbers

Stamp page numbers in the corner or center of each page, your way.

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Flatten PDF

Merge interactive form fields and their values into static page content.

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Organize PDF

Drag to reorder PDF pages, rotate or delete them, and select several at once, then rebuild.

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FAQ

Frequently asked questions

Everything about adding a text watermark to a PDF with PDFNEO.

How do I watermark a PDF for free?
Add your PDF above, type your text, adjust the look, then click Add watermark and download the file. It is free, with no sign-up and no watermark added by us.
Can I watermark a PDF without uploading it?
Yes. PDFNEO draws the watermark entirely in your browser's memory, so the document never leaves your device.
Can I change how strong the watermark looks?
Yes. Adjust the opacity, size, and angle so the watermark is as subtle or as bold as you need.
Does PDFNEO add its own watermark?
Never. The only mark on your file is the text you choose — there is no PDFNEO branding or trial stamp.
Can I watermark a PDF on my phone?
Yes. The tool works in any modern mobile browser — set your text, apply it, and save the file.

Ready to watermark your PDF?

Drop in a file, set your text, and stamp every page in seconds.

Watermark PDF