Free Online PDF Watermark Tool

Add Watermark to PDF Online

This free online PDF watermark tool lets you add text watermarks or image watermarks to one or more PDF files in your browser. You can upload one or more PDFs, choose the watermark type, adjust opacity, rotation, position, layout mode, and page range, then export new watermarked PDF files.

Everything runs locally in the browser without uploading your PDF to a server. It works well for contracts, proposals, invoices, internal documents, design drafts, training materials, and other PDF files that need clear ownership, confidentiality, branding, or usage markings.

If you are searching for terms like “add watermark to PDF online,” “add text watermark to PDF,” “add logo watermark to PDF,” “batch watermark PDF files,” or “tile watermark across PDF pages,” this tool is designed for exactly those workflows.

What this PDF watermark tool is useful for

  • add CONFIDENTIAL, DRAFT, SAMPLE, or INTERNAL text watermarks to PDF files
  • add a company logo watermark to contracts, quotes, and reports
  • place watermarks on selected PDF pages instead of the whole document
  • mark downloadable PDFs with a transparent diagonal watermark
  • label outgoing files with preview-only, internal-use, sample, or restricted-sharing marks
  • apply consistent branding or copyright markings to business PDFs

Supported watermark options

  • Text watermark: custom text, color, font size, opacity, rotation, and 9-position placement, including Chinese and English text
  • Image watermark: JPG, PNG, or WebP image watermark with size ratio, opacity, rotation, and position controls
  • Single watermark: place one watermark in a chosen area such as top left, center, or bottom right
  • Full-page tiling: repeat multiple watermarks across the entire page
  • Batch processing: upload multiple PDF files and export each result with the same watermark settings
  • Page range selection: all pages or selected pages like 1,3,5-8

How to add a watermark to PDF online

  1. Upload one PDF or multiple PDF files
  2. Choose text watermark or image watermark
  3. If you use a text watermark, enter the text and adjust font size, color, opacity, and rotation
  4. If you use an image watermark, upload a logo, stamp, or brand graphic and adjust scale, opacity, and rotation
  5. Choose whether to place a single watermark or tile the watermark across the page
  6. Choose all pages or enter a custom page range
  7. Export the result and download the watermarked PDF files

This makes it easy to add a confidential watermark to PDF files, create branded PDF copies, or batch mark documents before sharing them externally.

  • Opacity: usually 10% to 25% works well without making the document hard to read
  • Rotation: -30 to -45 degrees is common for diagonal confidential or draft watermarks
  • Font size: use larger text for strong visibility and smaller text for subtle ownership marking
  • Image scale: company logos usually work best at a moderate size rather than covering the whole page
  • Single watermark position: center, header area, and bottom-right corner are common choices
  • Tiled layout: best for confidential, draft, sample, preview, or internal-use documents

How to write a custom page range

If you do not want to watermark every page, use the custom page range option.

  • Single page: 3
  • Separate pages: 1,4,7
  • Continuous range: 2-6
  • Mixed selection: 1,3,5-8

Page numbers start at 1. Make sure the page numbers stay within the total page count of the uploaded PDF.

Batch watermark multiple PDF files

This tool supports batch PDF watermarking. You can upload multiple PDF files, configure the watermark once, and export each processed file with the same settings.

That is useful when you need to:

  • add the same confidential watermark to many contracts
  • apply a DRAFT watermark to several proposals or bids
  • brand multiple internal training PDFs
  • add the same company logo watermark to a set of reports, manuals, or presentations

If your goal is to watermark many PDFs quickly, batch processing saves a lot of repetitive work.

Common use cases

  • add a confidential watermark to PDF
  • add a logo watermark to PDF
  • apply a draft watermark to proposals and bids
  • mark internal training PDFs
  • create sample or preview PDF versions
  • add copyright or ownership markings to manuals and design files
  • add distribution warnings before sending documents to clients or partners

Why image watermarks can be useful

An image watermark is a better choice when:

  • you want to use a company logo
  • you already have a transparent stamp or watermark graphic
  • you want the watermark to match your brand style
  • you need a visual mark instead of plain text

If you only need a quick “Confidential” or “Draft” label, text watermarking is faster. If branding matters more, image watermarking is usually the better option.

Privacy and security

PDF reading, watermark generation, image processing, and export all happen locally in your browser without sending files to a server.

Things to keep in mind

  • A watermark is visible page content, not a file permission system
  • If the document requires stronger control, combine watermarking with access control and document management rules
  • For image watermarks, use a clear PNG, JPG, or WebP file
  • If the watermark covers too much text, reduce opacity or choose a smaller size

Who this tool is for

  • sales and business teams who need to watermark contracts, quotes, and proposals
  • operations and admin teams who need internal-use or archive markings
  • design and product teams who need branding or copyright overlays on PDFs
  • companies that need to batch watermark many PDF files before distribution

If your main goal is to add a text watermark to PDF, add a logo watermark to PDF, batch watermark PDF files, or tile a watermark across each page, this tool is built around those exact use cases.