透かしを追加

☁️ Server

Add watermark to PDF online for free. Insert text or image watermarks into your PDF documents. Browser-based, customizable, and instant.

Drop a PDF here or click to browse

How to 透かしを追加

1 アップロード
2 設定
3 処理
4 ダウンロード

Why Use JadePDF to 透かしを追加?

JadePDF adds watermarks directly in your browser. Protect your documents with custom text or image watermarks. Adjust opacity, position, and size without uploading to servers.

✓ Transparent about server use with privacy guarantees
✓ No signup required, no daily limits
✓ No watermark, no ads in the tool widget

How Does 透かしを追加 Work?

Upload your PDF, choose text or image watermark, customize position, opacity, and size, then download the watermarked file.

プライバシーとセキュリティ

This tool requires server processing because the underlying software doesn't run in browsers yet.

Your privacy guarantees:

• Files transmitted via TLS 1.3
• Stored encrypted (AES-256) in temporary storage
• Automatically deleted 60 seconds after processing
• No content logging
• No AI training on your files
• No data sharing with third parties