Manually watermarking PDFs one by one is a nightmare when you have hundreds of files. Whether it's "CONFIDENTIAL", "DRAFT", or your company logo, DocInspector's batch watermark feature handles entire folder trees in one go.
💡 Quick tool: Apply custom watermarks to your files instantly with our free and secure Add Watermark to PDF Online tool, running 100% locally in your browser.
💡 Quick tool: Need to merge your document layers? Use our free Flatten PDF Online tool for secure, client-side flattening.
Why watermark?
Watermarks serve multiple purposes: they mark document status (draft vs final), assert ownership, deter unauthorized sharing, and create accountability when documents leak. For law firms handling sensitive discovery documents, watermarks are practically mandatory.
The batch approach
In DocInspector, select the PDF Repair module, load your folder, and choose the watermark option. You can set custom text, position, opacity, rotation, and font size. Hit process, and every PDF in your folder gets watermarked while preserving the original structure.
Smart watermarking
DocInspector applies watermarks at the PDF level — not by converting to images. This means your text remains searchable and the file size stays reasonable. If you need image-based flattening too (for evidence hardening), that's a separate option you can combine.