Is Add Watermark to PDF free?

Yes, Add Watermark to PDF on PDF Merge Toolkit is completely free. No subscription, no sign-up, and no watermarks on your output.

Are my files safe when using Add Watermark to PDF?

Yes. All files are transferred over 256-bit SSL encryption and are permanently deleted from our servers within 30 seconds of processing. We never read or store your document contents.

Do I need to create an account?

No account or sign-up is required. Simply visit the page, upload your file, and download the result.

What is the maximum file size?

The maximum file size is 20 MB per upload. For larger files, try compressing your PDF first using our free Compress PDF tool.

🔒 We never store your data ✦ ⚡ Lightning fast conversions ✦ ✅ 100% Free — No sign-up required ✦ 🌐 Works entirely in your browser ✦ 🚫 No watermarks on any output ✦ 📄 48+ PDF tools in one place ✦ 🔒 We never store your data ✦ ⚡ Lightning fast conversions ✦ ✅ 100% Free — No sign-up required ✦ 🌐 Works entirely in your browser ✦ 🚫 No watermarks on any output ✦ 📄 48+ PDF tools in one place ✦

All Tools

Add Watermark to PDF Online Free

Stamp custom text on every page — no sign-up, no watermark on output

Drag & drop your PDF here

Watermark Text *

0 / 100

Font

Size

Opacity 30%

Color

#CCCCCC

Rotation

Position on Page

Light color & low opacity = subtle look.

Max file size: 20 MB. One PDF only. Output is a watermarked .pdf.

Tool Guide

Why use Add Watermark to PDF Online?

Upload your PDF, type your watermark text, and customise the font, size, colour, angle, and opacity. Click Add Watermark and your branded PDF is ready to download. Completely free — no watermark is added to your watermark.

Custom text on every page
Control font, size, colour, angle, and opacity
Diagonal or horizontal watermark placement
Instant preview — free online

Upload

Select or drag your file

Process

One click — done instantly

Download

Save your result file