David Bombal #519: Build Your First OSINT Bookmarklet in 5 Minutes
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Nov 8, 2025 Micah Hoffman and Griffin G are OSINT experts and co-founders of MyOSINT Training, specializing in investigative tools. They dive into how to extract hidden data from popular platforms using simple JavaScript bookmarklets. The duo discusses practical applications in law enforcement, helps investigators craft tools with AI, and explains the importance of operational security when utilizing these techniques. They're passionate about empowering others to build their own OSINT resources, making sophisticated investigations accessible to everyone.
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Hidden Browser Data Is Investigative Gold
- Bookmarklets reveal hidden data already present in your browser without querying the site.
- That hidden data (IDs, creation dates, timestamps) can be critical for investigations and legal processes.
Page Source Often Holds Untapped Clues
- Pages often include unrendered source data (emails, comments, IDs) useful for investigations.
- Bookmarklets act as a practical window into that beneath-the-surface data layer.
Check Bookmarklets With An LLM First
- Verify bookmarklets before use because they run in your browser and can access sensitive data.
- Paste the bookmarklet into an LLM and ask it to describe risks before running it.