Signvoy

Free Tool

Stamp custom text on every page of your PDF. Control the text, size, opacity, rotation, and color — then download with the watermark permanently embedded.

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How it works

Add a watermark in three steps

  1. 1

    Upload your PDF

    Drag and drop your PDF onto the tool or click to browse. The file loads in your browser — never sent to any server.

  2. 2

    Set the watermark

    Type your watermark text (e.g. 'CONFIDENTIAL' or 'DRAFT'). Adjust font size, opacity, rotation angle, and color using the controls.

  3. 3

    Download the watermarked PDF

    Click 'Download watermarked PDF'. The watermark is drawn on every page using pdf-lib and your browser downloads the result immediately.

Why use Signvoy

Full control, instant results

Fully customizable

Set any text, font size, opacity (5–60%), rotation angle (0–90°), and color. The live preview shows you roughly how it will look before downloading.

Every page, instantly

The watermark is applied to all pages at once using pdf-lib in your browser — no queue, no per-page upload, no waiting.

Private by design

Your PDF never leaves your device. All processing is local — close the tab and everything is gone.

Need to send a document for others to sign?

This free tool covers self-serve, one-step document work. Signvoy's full platform adds everything a business needs: send to multiple signers, enforce a signing order, get a tamper-evident audit trail, automate reminders, and attach a certificate of completion to every finished document.

  • Multi-party signing
  • Tamper-evident audit trail
  • Certificate of completion
  • Reusable signing templates
  • Sequential & parallel routing
  • Automatic reminders
  • REST API & webhooks
  • Conditional field logic
Get started free →See all features

FAQ

Common questions

Can I watermark only specific pages?
The current tool applies the watermark to all pages. If you need page-specific watermarks, use the Add Text to PDF tool to place text manually on individual pages.
Is the watermark removable?
The watermark is drawn directly into the PDF page content as a text element — it is not a removable annotation. However, it is not cryptographically secure; a determined person with editing software could attempt to remove it.
Can I use an image as a watermark?
Currently only text watermarks are supported. Image watermarks (e.g. a logo) are planned for a future update.
What opacity should I use?
For a typical 'CONFIDENTIAL' or 'DRAFT' stamp, 15–25% opacity works well — visible enough to notice but not so heavy it obscures the content. Use 40–60% for a bolder mark.

Want to learn more? Read the full guide: How to Add a Watermark to a PDF Online Free →

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