Free · Private · No Watermark

Add a PDF Watermark

Add a custom diagonal text watermark to every PDF page. Control text, opacity, and size with secure local browser processing.

🔒 Local browser processing⚡ No signup💧 No watermark📱 Mobile friendly
💧

Choose a PDF file

or drag and drop a file here

Preparing…

Add Watermark to PDF Online: fast, private and easy

Protect drafts, label confidential files, or brand documents with a consistent watermark across every page. The work happens on your own device, so your files are not uploaded to NextLevel Mindset.

Private by designYour document stays inside this browser tab.
Professional outputDownload a clean file without a forced watermark.
Works everywhereResponsive on Windows, macOS, Linux, Android and iPhone.

How to use this tool

1Select your file

Choose a compatible file or drag it into the upload area.

2Choose settings

Preview pages and adjust the available options.

3Download

Process the document and save the finished result.

Frequently asked questions

Is add watermark to pdf online free?

Yes. There is no signup fee, forced watermark, or fixed daily limit.

Do you upload or store my files?

No. The tool reads and processes the file locally in your browser. Closing or refreshing the page clears the working file from the page.

Why might a very large file be slower?

Performance depends on your device memory and processor because all processing happens locally for privacy.

Explore more PDF tools

🔗 Merge PDFCombine multiple PDF files into one document in your browser.✂️ Split PDFSplit PDF pages online by custom ranges or extract individual pages.🗜️ Compress PDFReduce PDF file size online with adjustable image quality and resolution.🗂️ Organize PDF PagesReorder PDF pages using drag and drop, then download the organized file.🗑️ Remove Pages from PDFSelect and delete unwanted pages from a PDF online.📤 Extract PDF PagesSelect PDF pages visually and extract them into a new file.