Free Tool
Add a custom text watermark to every page of a PDF — control opacity, size, and rotation, then download instantly.
How to Add a Watermark to a PDF Online for Free
To watermark a PDF, add the file above, type your watermark text, and adjust its opacity, size, and rotation. The stamp is applied to every page in your browser and downloads with no upload and no account.
How it works
Add a watermark in three steps
- 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
Set the watermark
Type your watermark text (e.g. 'CONFIDENTIAL' or 'DRAFT'). Adjust font size, opacity, rotation angle, and color using the controls.
- 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
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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