Supported formats
This function provides PDF format conversion. Do not upload illegal or infringing files.
PDF加水印
PDF加水印是一种文档加密技术，它可以在PDF文件中添加图片或文字水印，以增加文档的安全性和保护文档的版权。用户可以通过设置水印的位置、大小、颜色、透明度等属性来自定义水印。加水印后，即使文档被未经授权的人篡改，水印也不会消失，从而可以有效地保护文档的安全性和版权。
PDF加水印
Remeins provides free PDF加水印 tools with unlimited usage, up to 20MB per file, and no charge.
About file security
We take file security seriously. Do not share file codes with others. All files are automatically deleted after one day.