Free PDF Watermark Tool
Free PDF watermark tool. Add a custom text watermark to any PDF instantly — processed in your browser, nothing uploaded.
Free PDF Tool
Add Watermark.
Text Watermark. Free. Instant.
Add a custom text watermark to any PDF instantly. Processed entirely in your browser using pdf-lib — nothing uploaded.
No sign-up100% freeFiles never uploadedWorks on iPhone
PDF Watermark Tool
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Drop your file here
or click to browse
PDF only · Max 100MB · Never uploaded
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Processing...0%
Something went wrong. Please try a different file.
✅
Done!
Your file is ready
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100% private
Processed in your browser only
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Instant
No waiting, no queue, no server
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Auto deleted
Wiped from memory on download
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Works everywhere
iPhone, Android, any browser
Related Tools
More from Kaeltripton — UK Finance Guides
Free PDF Watermark Tool — Add Text Watermark
Add a diagonal text watermark to every page of your PDF — custom text, opacity and font size. Processed using pdf-lib in your browser with nothing uploaded.
Frequently asked questions
Is this free?+
Yes — 100% free, no sign-up.
Can I customise the watermark?+
Yes — set the text, opacity and font size.
Does it work on iPhone?+
Yes — all modern browsers.
