Add machine-readable layer
Embed an invisible text layer in a PDF: a human never sees it, but extractors and LLMs read it back. An alternative (machine-readable) text layer.
- 1Files
- 2Settings
- 3Run
- 4Result
1. Files
Source file
Accepted formats: .pdf2. Settings
3. Run
Attach a file to continue
How it works
- 1Upload the PDF.
- 2Enter the text machines should read and choose the pages.
- 3Download the file: the layer is invisible in a viewer, but extractors and LLMs read it back.
Frequently asked questions
- Why add an invisible layer?
- For testing and demonstration: it lets you check how your own parser, bot, or LLM reacts to invisible text, and confirm the 'Find hidden layers' tool detects it.
- Can this be used as protection?
- No. The layer is neither encrypted nor obfuscated: any extractor — including our own scanner — will surface its full text.
- Can I choose specific pages?
- Yes — the layer is added either to the pages you list or to all of them at once.