No upload
PDF and image bytes stay in your browser during editing.
Watermark PDF
Add a PDF watermark locally.
Add visible watermark text to a PDF and export the marked copy from your browser.
Watermarks are visual marks, not access control or redaction. Do not use them to hide sensitive information.
Selected mode: Sign / Mark
Add PDFs
Drop files here or choose from your computer. Use multiple files for Merge; other modes work on the first readable PDF.
Add PDFs
Choose the file or files for the selected mode.
Adjust the order
Merge and Organize support reordering before export.
Export locally
The edited PDF is generated in this browser.
Sign / mark PDF
This adds visual marks only. It does not create a legal e-signature or a cryptographic digital signature.
Export
The edited PDF is generated in this browser. Advanced PDF features such as bookmarks, attachments, complex forms, or existing digital signatures may not be preserved after editing.
Add a readable PDF to enable export.
No export trap
Download is available after processing without an email gate.
Honest scope
No fake redaction, OCR, compression, or legal signature claims.
Trust check
How to verify no upload
Open your browser Network panel before choosing a PDF or image. Add a file, export it, and inspect the requests. The tool may send anonymous page/tool events, but it should not send PDF/image bytes, file names, page text, thumbnails, or local paths.
Newsletter signup only runs if you enter an email after export. The PDF download itself is not gated by signup.
How it works
How to watermark a PDF
Use this when a document needs a simple visible mark such as Draft, Sample, or Internal.
Steps
- -Choose one readable PDF.
- -Open Sign / Mark and enter the watermark text.
- -Export the watermarked PDF locally.
Good to know
- -The watermark is added visually to the exported copy.
- -The original PDF is not changed.
- -This does not protect, encrypt, redact, or lock the PDF.
FAQ
What this tool does and does not do
Does Private PDF Workbench upload my PDFs or images?+
No. The V1 tool reads and writes files in your browser. Entroparc does not receive PDF bytes, image bytes, file names, page text, thumbnails, or local file paths.
Is export free?+
Yes. You can download the edited PDF after local processing without creating an account or joining the newsletter.
Can it redact text or edit PDF text?+
No. Redaction, OCR, compression, password tools, and PDF text editing are intentionally excluded until they can be handled correctly.
Is the signature tool a legal e-signature?+
No. Sign / Mark adds a visual signature stamp only. It does not create a cryptographic or legal e-signature.
Which PDFs need extra checking after export?+
Check files with forms, bookmarks, attachments, existing digital signatures, unusual page boxes, or very complex document structures before relying on the result.
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