Watermark your PDFs
with text or images.
or drop your files here
Max file size 100 MB
- No signup needed
- Private & encrypted
- 256-bit SSL
- AES-256 encrypted
- SOC 2 Type II
Watermark in 3 easy steps
Upload your PDF
Upload the document you want to watermark. Your file is processed securely in your browser.
Add your watermark
Type your text or upload a logo, then adjust the opacity, rotation, and position until it looks right.
Download your file
Apply the watermark to every page and download your protected PDF in seconds.
One place for every PDF task
Every tool you need to edit, convert, sign, and manage your PDF documents.
From plain page to protected document
Add a text or image watermark and stamp it across every page in seconds.
The watermark tool people
actually trust
Text or image, on one page or all of them. Everything you need to watermark PDFs online.
Text watermarks
Any words you need
Stamp any text across your pages, like DRAFT, CONFIDENTIAL, or your company name, in the font and color you choose.
Image and logo watermarks
Upload your own brand
Upload a logo or signature image and place it as a watermark to brand and protect your documents.
Full customization
Opacity, rotation, position
Fine-tune opacity, rotation, size, and placement so your watermark looks exactly how you want it.
Apply to every page
Whole document at once
Add your watermark to a single page or stamp it across the entire document in one click.
Works on any device
Desktop, tablet, or phone
Watermark PDFs from any device with a browser. No software to download or install.
Private and secure
Your files stay yours
Your files are encrypted during transfer and never shared. We follow GDPR best practices.
Trusted every day,
by people like you
See what people are saying about watermarking PDFs with lumr.
TrustScore 4.6 · Based on 3,247 reviews
“I stamp our logo on every proposal before it goes out. It takes seconds and keeps everything on brand.”
Sarah M.
Marketing Manager
“Adding a DRAFT watermark to client previews used to mean opening heavy software. Now I just upload and done.”
James K.
Freelance Designer
“Marking documents as CONFIDENTIAL across every page is effortless. Exactly the tool we needed.”
Ana L.
Legal Assistant
We answer
your questions
Everything you need to know about adding watermarks to PDFs online.
Yes. You can add a text watermark with your own words, like CONFIDENTIAL or your company name, or upload a logo or signature image to use as a watermark. You control the opacity, rotation, size, and position of each.
This tool adds watermarks rather than removing them. To take out an existing watermark, use our PDF editor, where you can delete or edit elements on a page directly.
Absolutely. Your files are encrypted with AES during transfer and processed securely. We follow GDPR best practices and never share your documents with third parties.
You can upload PDF files up to 100 MB. For most documents this is more than enough. If you need to work with larger files, consider compressing them first with our Compress PDF tool.
Security you can trust
Independently audited and compliant with the security and privacy standards your documents demand.
- SOC 2 Type II
- GDPR
- ISO 27001
- HIPAA
- eIDAS
- PCI DSS
Ready to watermark your PDF?
Join millions of users who trust lumr for fast, secure PDF tools. No fees, no hassle.
- Ready in 3 seconds
- 256-bit SSL secure
- Works on any device