PixConvert

Add Watermark to PDF

Stamp custom text watermarks onto PDF pages with full control over size, opacity, color, and position. Runs entirely in your browser.

Why Use PixConvert PDF Watermark

Professional PDF watermarking without uploading your files to any server.

Custom Watermark Text

Type any watermark text — CONFIDENTIAL, DRAFT, your company name, or any custom label.

Full Style Control

Adjust font size (24–72pt), opacity (10–100%), color (red, gray, blue, black), and position to match your document style.

100% Private

All watermarking happens locally using pdf-lib in your browser. Your PDF never leaves your device.

Diagonal Rotation

Apply diagonal watermarks at 45° for the classic document protection look, or choose from centered and corner positions.

Selective Pages

Apply watermarks to all pages, just the first page, or a custom selection like pages 1, 3, 5-7.

No File Size Limits

Watermark PDFs of any size. Your device's memory is the only limit — no server-side caps.

When to Watermark a PDF

Watermarks communicate document status and ownership at a glance.

Document Protection

Mark sensitive documents with CONFIDENTIAL or PROPRIETARY to signal restricted distribution.

  • Mark confidential reports
  • Protect legal documents
  • Label internal memos

Draft & Review Workflows

Stamp DRAFT or REVIEW on documents to distinguish working versions from final outputs.

  • Mark proposal drafts
  • Flag documents for review
  • Differentiate document versions

Branding & Copyright

Add your company name or copyright notice to PDFs before sharing with clients or publishing.

  • Brand client deliverables
  • Add copyright to published PDFs
  • Watermark portfolio work

How to Add a Watermark to a PDF

1

Upload your PDF by dragging it into the dropzone or clicking to browse. The editor shows the total page count.

2

Customize your watermark: enter text, choose font size, opacity, color, position, and which pages to apply it to.

3

Click Apply Watermark and download your watermarked PDF instantly. Everything runs in your browser — no uploads.

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Frequently Asked Questions

PDF watermarking explained.

Is my PDF uploaded to a server?

No. All watermarking happens locally using pdf-lib in your browser. Your PDF never leaves your device.

Can I remove the watermark later?

The watermark is embedded directly into the PDF page content. It cannot be removed without specialized PDF editing tools.

What fonts are used for the watermark?

Watermarks use Helvetica Bold (a standard PDF font included in all PDF viewers). No external fonts are required.

Will the watermark cover the existing content?

The watermark is overlaid with your chosen opacity. At 30% opacity (the default) it is clearly visible but does not obscure the underlying content.

Is there a file size limit?

There is no server-imposed limit. Very large PDFs may take longer to process depending on your device's memory and CPU speed.