Apply highly customizable text or logo watermarks to multiple PDF files in batch. Adjust angle, opacity, color, and layer settings to protect your intellectual property. Combine watermarking with PDF/A archiving, metadata sanitization, encryption, and flattening simultaneously in a single session.
error folder with a detailed log.
ℹ️ The entire page text layer is removed to guarantee no sensitive content remains (image-only output).
⚠️ Note: If your PDF is an image or scanned document, text cannot be found. We recommend selecting "Rebuild & Repair PDF" alongside Redact for OCR, but this will increase processing time.
DocInspector applies watermarks at the vector level, preserving document resolution while locking intellectual property.
Unlike simple image overlays, DocInspector embeds watermarks directly into the PDF's content stream as native vector elements or high-resolution rasters. This prevents easy removal by standard PDF editors while keeping text selectable under the watermark.
Control precisely how visible your watermark is. The engine calculates contrast adjustments to ensure the watermark remains readable on both white pages and dark backgrounds, without obstructing the underlying text.
Run watermarking on entire directory structures. You can watermark a folder while flattening its layers and encrypting it with a password all in a single action, keeping the original folder layout.
Our online tool is built on the same isolation principles as the desktop app. Here is the exact data flow from your browser to the processed output.
Apply custom logo or text overlays to your documents in batch. Under the watermark settings, you can define font family, size, angle (-90 to 90 degrees), opacity (0 to 100%), and placement. Process entire directories recursively while maintaining your folder layout. Combine watermarking with flattening, sanitizing metadata, or password protection in a single pipeline.
If you flattened the PDF after watermarking, the watermark becomes part of the page image and cannot be removed. Without flattening, it is embedded in the content stream.
No, vector text watermarks add less than 1 KB per page. Image logos may increase size slightly depending on image resolution.
Unlock higher limits, batch processing of thousands of files, folder trees, multi-action pipelines and advanced reporting. Choose the plan that fits your workflow.