Add a Text Watermark to PDF
Add a text watermark to every PDF page online — diagonal DRAFT or CONFIDENTIAL stamps, custom color, size, opacity and position.
How to add text / watermark
Type the text — DRAFT, CONFIDENTIAL, a client name — choose diagonal or one of nine positions, set size, color and opacity, and it's stamped identically on every page. A large diagonal at 15–25% opacity is the standard look: unmistakable across the page, still perfectly readable underneath.
- Drop your file into the box above, or click it to browse. You can also paste from the clipboard.
- Adjust the options to taste — the defaults are sensible for most cases.
- Press Process and watch the progress bar; everything runs on your device.
- Download your result — individually, or as a ZIP when there are several files.
Like every tool on ImageCompressorKits, this runs 100% in your browser: your file is never uploaded to any server, which makes it safe to use even with private documents — and it keeps working if you go offline after the page loads.
Frequently asked questions
Can the watermark be removed?
It's drawn into the page content, so casual viewers and printers can't toggle it off. Determined editing tools can attempt removal — treat it as strong labeling, not encryption.
Can I watermark only some pages?
This stamps all pages for consistency. To watermark a subset, Split the PDF, watermark that part, and Merge it back — all three steps are lossless.
Is this tool really free?
Yes — completely free, with no signup, no watermark, and no file limits beyond what your device's memory can handle.
Are my files private?
Yes. Processing happens locally in your browser via JavaScript; nothing is transmitted or stored. See our privacy policy for the full picture.