Can I add watermark to pdf online free without uploading my file?

Add a custom text watermark to every page of your PDF. Choose font, size, opacity, color, and position. No upload. OnDevicePDF runs locally in your browser, so your file is not uploaded to a server.

Which tool should I use to add watermark to pdf online free?

Use Watermark PDF. It is built for this workflow and keeps processing on-device in your browser.

Can I add confidential stamp to pdf without uploading my file?

Stamp your PDF with CONFIDENTIAL, DRAFT, APPROVED, or any custom text. Diagonal or horizontal placement with adjustable opacity. OnDevicePDF runs locally in your browser, so your file is not uploaded to a server.

Which tool should I use to add confidential stamp to pdf?

Use Watermark PDF. It is built for this workflow and keeps processing on-device in your browser.

Can I add page numbers to pdf without uploading my file?

Stamp sequential page numbers onto your PDF. Position them at the footer, header, or any corner of every page. OnDevicePDF runs locally in your browser, so your file is not uploaded to a server.

Which tool should I use to add page numbers to pdf?

Use Watermark PDF. It is built for this workflow and keeps processing on-device in your browser.

Is Watermark PDF free to use?

Watermark PDF is free to use on OnDevicePDF with no sign-up required.

💧 Watermark PDF

Add watermarks, page numbers, and custom text to your PDFs.

PDF or drop files here

How to use

Drop one PDF.
Enable Page Numbers and/or Watermark. Pick position, margin, and (optionally) ranges (e.g., 1-3,5 or presets).
Tune style: number format (1 / 01 / 001 / i / I), start number, prefix/suffix; watermark opacity/size/rotation/color.
Use accurate preview (choose any page) to confirm placement and rotation before download.
Click “Add Watermark”. Privacy: everything runs in your browser - files never leave your device.

Privacy: most tools run in your browser. Advanced PDF Editor operations may use secure temporary backend processing.

About Watermark PDF Tool

Our free watermark PDF tool allows you to add custom watermarks, page numbers, and text stamps to your PDF documents entirely in your browser. Unlike online services that upload your files to remote servers, this tool processes everything locally on your device, ensuring complete privacy and security. Whether you need to protect intellectual property, brand documents, or simply add page numbers for easy reference, our tool offers professional-grade watermarking with full customization options.

The tool supports both visible watermarks (text, logos, copyright notices) and functional additions like page numbers with multiple formatting styles. With precise positioning controls, opacity adjustments, rotation options, and custom text styling, you can create exactly the watermarked PDFs you need without any software installation or subscription fees.

Why Watermark Your PDFs?

🛡️ Copyright Protection: Add © notices, "CONFIDENTIAL", or "DRAFT" stamps to protect intellectual property and prevent unauthorized use of your documents.
🏪 Branding: Include company logos, website URLs, or brand names on proposals, contracts, and marketing materials to reinforce your professional identity.
📝 Document Tracking: Add version numbers, dates, or unique identifiers to track document revisions and distribution.
📊 Page Numbers: Improve navigation in reports, manuals, and legal documents with automatically generated page numbers in multiple formats (1, 01, 001, i, I).
🔒 Privacy First: Unlike cloud-based services, your files never leave your device, which is perfect for sensitive legal, financial, or medical documents.

Common Use Cases

📚 Educational Materials

Add page numbers to textbooks, study guides, and course materials for easy reference during lectures and exams.

💼 Business Documents

Watermark proposals, invoices, and contracts with your company logo and "CONFIDENTIAL" stamps.

📝 Legal Filings

Add sequential page numbers and "DRAFT" watermarks to legal briefs and court documents before final submission.

📧 Email Attachments

Mark PDFs with your contact information or website URL when sending portfolios or marketing materials.

Frequently Asked Questions

Can I watermark multiple PDFs at once?

Currently, the tool processes one PDF at a time for privacy and performance. However, you can use our Merge PDF tool first to combine multiple files, then apply watermarks to the merged document.

Are my files uploaded to your servers?

No! Everything runs 100% in your browser using modern web technologies (PDF-lib and Canvas API). Your files never leave your device, making this tool perfect for confidential documents. You can even use it offline once the page loads.

Can I add image watermarks or logos?

The current version supports text-based watermarks with full customization (opacity, rotation, color, size). For image-based logos, consider using our PDF Editor tool which supports importing images onto PDF pages.

What page number formats are supported?

You can choose from: decimal (1, 2, 3), zero-padded (01, 001), lowercase Roman numerals (i, ii, iii), or uppercase Roman numerals (I, II, III). You can also add custom prefixes/suffixes like "Page 1 of 10" or "P-01".

🔗 Related Tools

Enhance your PDF workflow with these complementary tools:

🔒 Password Protect PDF 🧩 Merge PDF 🗜️ Compress PDF

Local-only processingNo uploads for most toolsOffline-capable

Processing Mode: Local-Only On Device

This tool processes files in your browser on your device. No backend upload is required for the core workflow.

How to use Watermark PDF

1. Upload your PDF
Click or drag your PDF into the Watermark PDF tool. The document loads locally in your browser.
2. Enter your watermark text
Type the watermark text you want - for example CONFIDENTIAL, DRAFT, your company name, or any custom label.
3. Customize the appearance
Adjust the font size, color, opacity, rotation angle, and position (center, header, footer, or corner) to get the exact look you need.
4. Download the watermarked PDF
Click Apply Watermark and then Download. Every page of your PDF will have the watermark embedded permanently.

FAQ

Can I customize the watermark appearance?

Yes. You can set the watermark text, font size, color, opacity, rotation angle, and position on the page.

Can I add a CONFIDENTIAL or DRAFT stamp to a PDF?

Yes. Type any watermark text including CONFIDENTIAL, DRAFT, APPROVED, or your company name. Adjust the opacity to make it subtle or bold.

Can I use this tool to add page numbers to a PDF?

Yes. Use the watermark tool to add a page number stamp. For automated sequential numbering on each page, position and configure accordingly.

Continue your workflow

Users who used this tool also worked with:

🔒

Protect PDF

Add password protection.

✏️

Rename PDF Files

Change filename & metadata.

🖼️

Image to PDF

Combine images into a PDF.

🗜️

Compress PDF

Reduce file size.

How to use

Drop one PDF.

Enable Page Numbers and/or Watermark. Pick position, margin, and (optionally) ranges (e.g., 1-3,5 or presets).

Tune style: number format (1 / 01 / 001 / i / I), start number, prefix/suffix; watermark opacity/size/rotation/color.

Use accurate preview (choose any page) to confirm placement and rotation before download.

Click “Add Watermark”. Privacy: everything runs in your browser - files never leave your device.

Privacy: most tools run in your browser. Advanced PDF Editor operations may use secure temporary backend processing.

About Watermark PDF Tool

Why Watermark Your PDFs?

🛡️ Copyright Protection: Add © notices, "CONFIDENTIAL", or "DRAFT" stamps to protect intellectual property and prevent unauthorized use of your documents.

🏪 Branding: Include company logos, website URLs, or brand names on proposals, contracts, and marketing materials to reinforce your professional identity.

📝 Document Tracking: Add version numbers, dates, or unique identifiers to track document revisions and distribution.

📊 Page Numbers: Improve navigation in reports, manuals, and legal documents with automatically generated page numbers in multiple formats (1, 01, 001, i, I).

🔒 Privacy First: Unlike cloud-based services, your files never leave your device, which is perfect for sensitive legal, financial, or medical documents.

How to use Watermark PDF

1. Upload your PDF

Click or drag your PDF into the Watermark PDF tool. The document loads locally in your browser.

2. Enter your watermark text

Type the watermark text you want - for example CONFIDENTIAL, DRAFT, your company name, or any custom label.

3. Customize the appearance

Adjust the font size, color, opacity, rotation angle, and position (center, header, footer, or corner) to get the exact look you need.

4. Download the watermarked PDF

Click Apply Watermark and then Download. Every page of your PDF will have the watermark embedded permanently.

FAQ

Can I customize the watermark appearance?

Yes. You can set the watermark text, font size, color, opacity, rotation angle, and position on the page.

Can I add a CONFIDENTIAL or DRAFT stamp to a PDF?

Yes. Type any watermark text including CONFIDENTIAL, DRAFT, APPROVED, or your company name. Adjust the opacity to make it subtle or bold.

Can I use this tool to add page numbers to a PDF?

Yes. Use the watermark tool to add a page number stamp. For automated sequential numbering on each page, position and configure accordingly.