Add Watermark to PDF

Stamp your documents

A watermark marks a document's status at a glance: DRAFT, CONFIDENTIAL, SAMPLE, or your company name across every page. When you watermark pdf files with GroPDF, you type the text once and it's stamped diagonally across all pages — a simple, visible deterrent against casual misuse or confusion about a document's status.

How to add a watermark

1. Drop your PDF onto the page. It never leaves your device.
2. Type your watermark text — CONFIDENTIAL, DRAFT, your name, whatever fits.
3. Tune the look: drag the opacity slider (lighter = subtler) and set the angle. Tick “Repeat across the page” for a tiled pattern.
4. Apply and download. The watermark is baked into every page.

Tips for a professional result

• Keep opacity low. Around 20–30% is visible without making the underlying text hard to read. Higher opacity suits “DO NOT COPY”-style warnings.
• Short text works best. One or two words at 45° reads cleanly; long sentences get cramped and distracting.
• Watermark before sharing, not before editing. Add it as the last step — if you later edit or compress the file, do that first.

Honest limitations

A text watermark is a deterrent, not security: anyone determined can cover or crop it out of a page image. It also can't be selectively applied — every page gets stamped. If you need real access control, wait for our upcoming Protect PDF tool, which will add password encryption.

Watermark vs. header text

A watermark sits behind or across the page content at an angle — impossible to miss. That's different from a header like “Confidential” typed at the top of the page, which readers easily overlook. Use watermarks when the status must be unmistakable (drafts under review, samples sent to prospects); use Edit PDF to add subtle header text when you just want a quiet label.

Removing a watermark later

There's no “unwatermark” button — once stamped, it's part of the page. Always keep the original file. If you think you'll need a clean version later, watermark a copy, not your only master.

Steps at a glance

1. Upload your PDF.
2. Type your watermark text (e.g. your name, company, or 'DRAFT').
3. Adjust size, opacity, rotation, and position; preview how it looks on the page.
4. Apply and download the watermarked PDF.

Why watermark PDFs with GroPDF?

Watermarks serve as both branding and protection — a visible 'CONFIDENTIAL' or your logo discourages casual copying and makes the document's status clear. GroPDF renders the watermark onto each page as permanent content with a live preview, so you see exactly how subtle or bold it looks before committing. The 50% default opacity is a sensible starting point: visible without obscuring the text beneath.

Common use cases

• Stamping 'DRAFT' on a proposal so nobody mistakes it for the final version.
• Adding your business name to invoices or quotes as branding.
• Marking documents 'CONFIDENTIAL' before sharing with a limited group.
• Adding a copyright notice across portfolio pages.

Things to know

The watermark is applied as page content — it deters casual reuse but a determined person can still crop or cover it (no watermark is truly tamper-proof). Very long text at large sizes may overlap page content; the preview helps you find the right balance. This is a text watermark; for image/logo watermarks, check the tool's logo mode if available.