PDF-XChange Editor is one of the best free PDF editors, and a successor to the excellent PDF-Change Viewer. Its design has been totally overhauled, making it much clearer and easier to use.

PDF-XChange Editor is a comprehensive PDF editor that allows you to create, view, edit, annotate, and digitally sign PDF documents with ease. With advanced features like OCR, document security ...

PDF-XChange Editor is has a boatload of features, for creating, editing, annotating, and securing PDF documents. The fully functional free versions offer plenty for many users, but you’ll have ...

PDF-XChange Editor is a comprehensive PDF editor that allows you to create, view, edit, annotate, and digitally sign PDF documents with ease. With advanced features like OCR, document security ...

通过以上步骤，您可以轻松使用 PDF-XChange Editor 为 PDF 文件添加文字或图片水印。 无论是用于版权保护还是文件标识，这一功能都非常实用。

Just note: while the free version of PDF-XChange Editor lets you edit pictures by clicking Edit > Images, it’ll place a watermark on the finished file unless you pay for it.

You can find free PDF editors on the internet, but their most important features tend to be behind a paywall. Here we recommend five free PDF editors.