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Watermark PDF

Stamp custom text or image watermarks onto PDF pages with opacity, angle, and repeat controls.

✓ 100% Free 👤 No Registration ⚡ Fast Vector Engine 🔒 Zero Server Uploads
PDF Tools Illustration
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Drag & Drop a PDF File here or Click to Browse

Select the PDF document you want to stamp or protect.

🔒 Complete Confidentiality: Documents are processed strictly inside your device memory.

Why Watermark PDF Documents In-Browser?

Watermarking is essential when circulating contracts, financial proposals, Aadhaar copies, or architectural blueprints. It deters unauthorized reproduction and designates the document's legal status (such as "CONFIDENTIAL", "FOR REVIEW ONLY", or "COPY"). AG World Tools embeds the watermark vectors directly into the internal PDF page content streams using standard ISO 32000 graphics operators. The entire process runs inside your local browser memory, ensuring your sensitive agreements never touch an external cloud server.

🔒 Zero Cloud Uploads
Unlike commercial tools that require uploading your contracts to third-party servers, your PDF never leaves your computer or phone.
🎛️ Total Visual Control
Fine-tune opacity, rotation angles, colors, and font dimensions with instant live preview before downloading.
⚡ Preserves Vector Sharpness
The underlying text and graphics remain razor-sharp vectors. No blurry re-compression or loss of fidelity.

Frequently Asked Questions

Can someone easily delete the watermark from the PDF?

Our engine writes the watermark as native vector text operators inside the PDF content stream. Standard PDF viewers cannot simply click and remove it without specialized vector editing tools.

Is there any file size limit for watermarking?

Because processing executes in your browser's RAM, you can watermark large documents (100+ pages) smoothly without paying for expensive subscriptions.

Does AG World Tools save a copy of my document?

Never. We do not operate backend file storage. Everything is processed directly inside your browser tab and discarded the moment you close the page.