How it works
Complete the job in three clear steps
- Choose one PDF and watermark text from your device.
- Set the page and output options, then create a watermarked PDF.
- Inspect the downloaded result before replacing or deleting the original document.
Private Lucaden PDF tool
Add Watermark to PDF
Place diagonal text watermarks on all or selected PDF pages with opacity and color controls.
Free to use Your PDF is processed on this device and is not uploaded to Lucaden.
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Important
Check the result before relying on it
Keep an untouched copy of important source files. Browser processing depends on available device memory, and you should inspect every downloaded result before deleting the original.
Practical details
What this Lucaden tool does
Lucaden embeds a standard font and draws centered diagonal text above the existing page content. Page selection and opacity make it suitable for draft, confidential, sample, and review markings.
The document stays in browser memory during processing. Lucaden creates a new output file and never modifies the source on your device.
Included capabilities
- Custom watermark text
- Page selection
- Opacity and color controls
- Adaptive text sizing
Useful for
- Mark confidential drafts
- Label samples
- Add review status
- Identify internal copies
Questions
About this tool
Can a watermark be removed later?
A determined editor may be able to remove overlay content. Do not rely on a visual watermark as access control.
Will it cover the document?
Choose a light opacity and preview the downloaded result before distribution.
Open-source foundations
Built transparently
Lucaden documents its standards sources, architectural references, and permissive runtime dependencies while keeping this workspace consistent with the Lucaden interface.