Marking a document's status, clearly
Labeling a document as a draft, a sample, or confidential before sharing it is a small step that avoids real confusion later. This tool stamps a text watermark diagonally across every page of a PDF, directly in your browser, with the original file never uploaded anywhere.
Using it
- Upload the PDF you want to mark.
- Type the watermark text and adjust its opacity and angle.
- Download the watermarked file.
Advantages and limitations
Advantages
- Applied consistently across every page automatically
- Adjustable opacity and angle
Limitations
- Text watermarks only — no logo or image watermark
- Not a security measure, as covered below
What a watermark actually does — and doesn't
Worth being clear about this: a text watermark is a visual signal, not a technical protection. It makes a document's status obvious at a glance and makes unauthorized copies easier to trace back to a source, but it doesn't lock the file, prevent copying, or stop someone from editing the underlying content. If genuine access control or encryption is what you actually need, a watermark isn't the tool for that — it's for clear labeling, not security.
Common uses
- Marking a document clearly as "DRAFT" before it's finalized.
- Labeling a preview or sample before sending it out.
- Stamping "CONFIDENTIAL" across internal documents.
Pairs well with
Once watermarked, use PDF Merger to combine it with other files, or PDF Compressor to shrink it before sending.
Frequently asked questions
+Is this watermarker really free, with no sign up?
Yes. There's no account and no limit on how many PDFs you can watermark.
+Do you upload my PDF to a server?
No. The watermark is stamped onto each page directly inside your browser using pdf-lib — nothing is uploaded.
+Does a watermark actually stop someone from copying my document?
Not really — a text watermark is a visual deterrent and a way to clearly mark a document's status (draft, confidential, sample), not a technical protection. It doesn't prevent copying, editing, or redistribution; it just makes unauthorized use more obviously improper and easier to trace back to a source. For genuine access control, this isn't the right tool.
+Can I control the watermark's opacity and angle?
Yes — adjust the transparency and rotation so it's visible without overwhelming the underlying content.
+Does the watermark appear on every page?
Yes, applied consistently across the entire document.