Inject prompts into PDFs.
Add instructions, descriptions, or hidden prompts to your PDF metadata in seconds.
No files are uploaded to the server. Everything happens in your browser.
Modify the "Subject" field of the PDF.
Invisible text injection (opacity 0) on the first page.
Ideal for security testing, watermarking, or AI cataloging.
Note: The prompt will be inserted into the "Subject" field of the PDF metadata. Many PDF readers and AI systems read this field as the main description.
Click or drag here
Only PDF files (max 50MB)
filename.pdf
0.00 MB
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