Free Fact Checker

Free Fact Checker is a Chromium-based browser extension specifically designed to combat misinformation and language model (LLM) hallucinations. This artificial intelligence tool allows for the instant verification of text accuracy on platforms like ChatGPT, Gemini, and Claude, as well as on social media, news portals, and work documents. Its goal is to provide a layer of trust through real-time data validation, using Google Search as the ultimate source of truth.

The technical operation of Free Fact Checker relies on a process known as grounding via the Google Gemini API. When a user selects a text fragment on their computer, the tool does not generate a creative or probability-based response; instead, it crawls objective, up-to-date information on Google Search. The result is a grounded response that includes cited sources, allowing the user to cross-reference information directly from the original source. If no data exists to support a claim, the extension will explicitly notify the user instead of inventing an answer.

Key Capabilities and Benefits:

• Versatility: Compatible with any website, including Google Docs, Slides, PDF files opened in the browser, and social media platforms like X, Facebook, Instagram, and Reddit.
• Transparency and Citations: Delivers results based exclusively on search data, eliminating AI opinions and providing direct links to sources for manual verification.
• Guaranteed Privacy: Requires no registration and does not track user activity. Queries are sent directly from the browser to the Google API without passing through external servers.
• User Control: By using a personal Gemini API Key, users maintain full control over their data and the management of their daily queries.

To get started with Free Fact Checker, simply install the extension and link an API key obtained from Google AI Studio. This configuration ensures the tool operates independently and privately, without the need for additional subscriptions. It is an indispensable resource for content professionals, researchers, and users who want to browse the web with a critical eye. Because it is also available on GitHub, advanced users can review the source code, reinforcing the technical reliability of this fact-checking extension. Its use is optimized for desktop browsers, ensuring seamless integration into the daily workflow of anyone who needs to verify information quickly and efficiently.