Add Watermark to PDF
直接在浏览器中更改文件格式。无需安装。 立即免费下载！
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Why Add Watermarks to PDFs?
Watermarks are an essential tool for protecting document ownership, clearly marking draft versions to prevent premature distribution, indicating confidentiality levels on sensitive files, and deterring unauthorized copying or redistribution. They provide a visible layer of document status information while keeping the underlying content fully readable.
Common professional uses include stamping documents as DRAFT before they receive final approval from stakeholders, adding CONFIDENTIAL to sensitive internal reports and financial statements, branding proposal documents with your company name for professional presentation, and adding SAMPLE labels to preview copies of contracts, eBooks, or marketing materials.
How to Add a Watermark
- 1
Upload the PDF file you want to watermark.
- 2
The default watermark text 'WATERMARK' will be applied.
- 3
Click Convert to add the watermark to all pages.
- 4
Download your watermarked PDF document.
Key Features
- Custom watermark text
- Adjustable opacity and font size
- Diagonal text placement
- Applied to every page
- Free and secure processing
Frequently Asked Questions
转换后我可以编辑文件吗？ ▼
从 WATERMARK-PDF 转换为 WATERMARK-PDF 后，根据目标格式，您可以下载结果并进行修改。
将 WATERMARK-PDF 转换为 WATERMARK-PDF 安全吗？ ▼
是的，您的所有文件都受到强大的 256 位 SSL 加密保护。转换后，我们会自动从服务器中删除您的文件。
这个工具可以在手机上使用吗？ ▼
当然。我们的云转换器在 iOS、Android 设备和平板电脑上运行流畅，无需下载任何应用程序。
会保留原始文件大小吗？ ▼
为了在不显著损失质量的情况下节省存储空间，我们在转换为 WATERMARK-PDF 时使用最佳压缩技术。
有隐藏费用或水印吗？ ▼
没有。我们的平台 100% 免费使用，我们不会在您的文档或图像中插入任何水印或广告。