How does Watermark PDF handle my PDF?

Watermark PDF uses pdf-lib and PDF.js entirely in your browser — the PDF is loaded, transformed, and offered for download without ever being uploaded. Your document stays on your device.

Are my PDFs private and secure with Watermark PDF?

Yes — completely private. No upload, no server-side storage, no logs. Legal docs, medical records, invoices, and confidential contracts are safe to process here.

What's the file-size limit for Watermark PDF?

Watermark PDF handles most everyday PDFs (up to ~50 MB) comfortably. Very large PDFs (200+ MB scanned documents) may run slowly because the whole file lives in browser memory. There is no server cap.

Does Watermark PDF preserve text quality and searchability?

Yes. Text-based PDFs stay text-based (searchable, selectable, copy-able) after merging, splitting, rotating, or adding page numbers. Scanned/image PDFs remain images — OCR would be needed to make them searchable.

Can Watermark PDF open password-protected PDFs?

Watermark PDF can open PDFs with an owner password (permissions restriction) but not with a user password (open password). If a PDF asks for a password to open in your regular reader, unlock it first.

Is Watermark PDF free with no watermark on the output?

Yes. The output PDF is clean — no PromptSpace watermark, no signup wall, no page limit. Free forever.

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