CSCtools is a high-performance, privacy-focused online utility suite for PDF and image management. All tools run 100% locally in your browser.

Is it safe to use CSCtools for sensitive documents?

Yes, CSCtools uses client-side processing. Your documents never leave your device and are never uploaded to any server, ensuring maximum security and privacy.

Are these tools free?

Yes, all tools on CSCtools are completely free to use with no hidden costs or watermarks.

How to add watermark to PDF online free?

Simply upload your PDF to CSCtools Watermark PDF tool, customize your text or image watermark using the controls for opacity and position, and click apply. The tool processes everything locally in your browser memory.

Is it safe to watermark sensitive PDFs online?

Yes, CSCtools uses 100% local processing. Your PDF documents and the watermark assets never leave your computer or phone, ensuring total privacy for sensitive certificates or identity proofs.

Can I add a logo image as a watermark?

Yes, our tool supports both text and image watermarks. You can upload your own logo (PNG or JPG), adjust its transparency, and position it anywhere on the document or use 'Tile' mode to cover the entire page.

CSCtools

PDF Suite

Watermark PDF

Apply Custom Watermarks to PDF

Protect your documents with secure text or image overlays. All processing happens locally in your browser.

Select PDF Document

Click to browse or drop your file here. Add custom text or image watermarks securely in your browser.

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