PDF Watermark — Stamp Text on Every Page in Your Browser
Add a text watermark to every page of a PDF in your browser—nothing is uploaded to a server. Steps: open a PDF, enter stamp text (e.g. DRAFT), set opacity and angle, optionally add a PNG/JPG logo, apply, then download. Example: a two-page sample loads with text DRAFT at center, −45° rotation, and enables Download for watermarked.pdf. Encrypted files fail with a clear error. Differs from Add Watermark (photos) and Rotate PDF (orientation).
How it works
Choose one PDF, enter stamp text, adjust opacity and rotation, pick a position, optionally attach a PNG/JPG logo, click Apply, then Download. Every page gets the same overlay. Libraries load on first use.
Rules you should expect
Text/image overlays, position and opacity rules, privacy, and failure cases for local PDF watermarking.
- Text: Helvetica stamp on every page via drawText; default sample uses DRAFT at center, 35% opacity, −45°.
- Image: optional PNG/JPG embeds with embedPng/embedJpg, scaled to ~35% of page width/height, same position/opacity/rotation.
- Positions: center or corners; opacity 0.1–1; rotation −180° to 180°. Output is a new PDF—original bytes are not sent to a server.
- Limits: encrypted or corrupt PDFs fail clearly; files over ~25 MB may be slow; watermark removal is not supported.
Example
Sample builds a two-page PDF, applies text DRAFT at center with 35% opacity and −45° rotation on every page, and enables Download for watermarked.pdf.
Good fits
- Legal/ops: mark contract drafts CONFIDENTIAL before external review.
- Students: stamp DRAFT on thesis chapters shared for feedback.
- Site owners: brand preview PDFs with a semi-transparent logo on every page.
Frequently asked questions
Is my PDF uploaded?
No. The PDF library runs in your tab (scripts may load from a CDN). Your PDF is not uploaded to our servers.
How is this different from the image Add Watermark tool?
Add Watermark overlays text or logos on photos in the browser. This tool stamps every page of a PDF document—use both when you need image edits vs document drafts.
Can I remove a watermark later?
No. Watermarks are burned into the page content when you download. Removing them needs the original file or heavy editing—not something this tool reverses.
What about encrypted PDFs?
Password-protected PDFs usually fail to open here. Remove the password with a tool you trust, then watermark.
Can I add a logo image?
Yes—pick a PNG or JPG. It scales to roughly one-third of the page and uses the same position, opacity, and rotation as the text stamp.
Related tools
Questions or feedback
Something unclear, broken, or missing? Draft a message below — we read every note about these tools.