What watermarks can the PDF tool add?
Text watermarks — "CONFIDENTIAL", "DRAFT", "DO NOT SHARE", company names — with adjustable opacity, color and angle for labeling and copyright protection.
How do I stamp CONFIDENTIAL on a PDF?
Upload, type the watermark text, set opacity (20%-40% recommended) and tiling mode, add and download. The mark covers every page, visible but readable.
Can watermark opacity be adjusted?
Yes, 5%-90%: low opacity deters copying subtly; high opacity emphasizes status like CONFIDENTIAL or DRAFT.
Is online PDF watermarking safe?
Safe. Processing runs fully in your browser; files never upload, suitable for internal docs, contracts and design deliverables.
Does the watermark damage the PDF?
No. It is an overlay — original content, layout and clarity stay intact.
What is PDF watermarking best for?
Draft labeling, confidential documents, internal materials, bids and design deliveries to prevent unauthorized forwarding.
Are there limits on free use?
No. Free, no registration, unlimited, supporting Chinese and English text.
Does the watermark cover every page?
Yes — tiling mode covers each page so no page can bypass the mark.