Every tool you need to manage hidden text

100% free and easy to use! Hide secret text inside images, extract hidden data from photos, and uncover invisible text in documents like PDFs and DOCX.

Hide text in photo

Securely embed secret text messages inside any image file without changing its visual appearance.

Extract text from photo

Reveal and extract hidden text messages that were previously embedded inside image files.

Find hidden text

Detect and reveal hidden, white-on-white, or obscured text in PDF, DOCX, and DCS documents.

A 100% free, browser-based security tool

Detect hidden text, metadata, and prompt injections inside images and documents. Everything runs locally in your browser — no servers, no uploads, no tracking.

Detect Hidden Content In

  • JPG / JPEG images
  • PNG images
  • PDF documents
  • DOCX files
  • DOC files

Features

  • Find hidden or invisible text
  • Detect AI prompt injections
  • Scan for concealed instructions
  • Reveal hidden metadata
  • Detect white-on-white text
  • Analyze suspicious embedded content
  • Count words automatically

Security & Privacy

  • 100% free to use
  • Fully browser-based
  • No server processing or cloud uploads
  • Files never leave your device
  • Fast and secure scanning

Generated Reports Include

  • Hidden text findings
  • Prompt injection indicators
  • Metadata analysis
  • Suspicious content detection
  • Word count summary
  • File structure insights

Perfect For

  • AI security testing
  • Prompt injection detection
  • Privacy audits
  • File verification
  • Cybersecurity research

Why It Matters

Hidden instructions and malicious prompts can be embedded inside files without being visible to users. This tool helps identify hidden AI manipulation attempts and protects against prompt injection attacks before files are uploaded to AI systems.