Add a custom text watermark across your PDF pages.
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Add a watermark to PDF files online with PDFPilot4U — stamp text or image watermarks across every page in seconds. The watermark PDF tool supports custom text (with font, size, color, rotation, opacity), image watermarks (PNG logos, signatures), tiled patterns, or single positioned stamps. Use it to mark documents as DRAFT, CONFIDENTIAL, COPY, or add your company logo across contracts before sending to clients. The watermark PDF process preserves original page content and embeds the watermark as a separate layer, so you can re-process later to remove or change it. Files run entirely in the cloud with TLS 1.3 encryption, auto-deleting within 24 hours. Free for up to 30 watermark operations per day, no signup, no PDFPilot4U branding on output. The watermark PDF workflow is mobile-friendly and supports batch watermarking on Pro plans.
Drop the PDF file. The watermark PDF tool supports up to 500 MB on Business plans.
Choose text or image. Set font, size, color, rotation, opacity, and position (center, corners, tiled). Preview live on every page.
The watermarked PDF downloads instantly with the stamp applied to all selected pages.
Sales teams add company logo watermarks to contract PDFs before sending to clients for signature.
Legal teams stamp work-in-progress documents as DRAFT to prevent accidental external sharing.
Photographers add a translucent copyright watermark to portfolio PDFs before sharing with prospective clients.
How Add Watermark to PDF on PDFPilot4U compares to the most common alternatives.
| Feature | PDFPilot4U | iLovePDF | Smallpdf |
|---|---|---|---|
| Text + image watermarks | Both, on same PDF | Both | Both |
| Rotation and opacity control | 0-360° + 10-100% opacity | Limited rotation | Limited |
| Selective page watermarking | Choose pages | Limited | Premium only |
| Free daily limit | 30 operations/day (guest), unlimited on Business | ~3 tasks/hour for free, premium starts $7/mo | 2 documents/day free, premium $9/mo |
| Max file size (free) | 5 MB free, 100 MB Pro, 500 MB Business | ~10 MB free | ~5 MB free |
| AI features included | 12 AI tools (Ask PDF, Summarize, Translate, etc.) | Limited — AI add-on only on premium | AI features locked behind premium tier |
| Privacy / data handling | TLS 1.3 + AES-256, auto-delete in 24h, no model training | Files deleted in 2h, standard SSL | Files deleted in 1h, ISO 27001 |
| No watermark on output | Always — free + paid | Free tier may add watermark | Free tier may add watermark |
Yes. Apply a text watermark first, then re-process the output to add an image watermark — both layers stack on the same pages.
Yes. The watermark PDF tool lets you select which pages get the watermark — apply to all, odd, even, or custom page ranges.
PNG (with transparency), JPG, and SVG. Transparent PNGs work best for logo overlays without a background box.
Yes. Opacity is adjustable from 10-100%. Common watermark choices are 20-40% for a subtle effect.
Yes. Rotate watermark text 0-360 degrees — diagonal 45° watermarks are common for DRAFT or CONFIDENTIAL stamps.
Watermarks added by PDFPilot4U are a separate PDF layer that can be detected by our Redact tool. Watermarks burned into images are harder to remove.
Yes — 30 watermarks per day for guests. Free accounts unlock higher limits and saved watermark presets.
No. We never add PDFPilot4U branding or watermarks to your output PDF — only your chosen watermark appears.
