ContextSniper

ContextSniper is a browser extension designed to help security researchers and developers analyze websites quickly. It acts as an external brain that connects your browser to popular AI tools like Google Gemini, ChatGPT, and Claude. The main goal is to automate the process of finding security vulnerabilities and sensitive information leaks without needing to copy and paste data manually. By using this tool, users can turn their AI models into powerful assistants for penetration testing and code review.

Benefits

ContextSniper offers several key advantages for security professionals. It allows users to extract the plain text content and URL of any webpage with just one click. The tool intelligently handles very long pages by truncating them to avoid errors caused by anti-scraping measures or token limits. Users can customize their system prompts to suit specific needs, with a default setting that configures the AI as a senior penetration testing engineer. A major benefit is that all extraction logic happens locally within the browser. This ensures that no sensitive testing data is sent to third-party servers, protecting user privacy. The extension also supports seamless switching between different AI platforms, making it flexible for various workflows.

Use Cases

This tool is primarily used by security researchers, penetration testers, and developers who need to audit websites for potential risks. A common use case involves analyzing a target website to identify exposed sensitive information or weak security configurations. Users can navigate to any site, click the extension icon, and instantly send the page content to an AI model for analysis. The AI can then generate reports on attack surfaces or suggest fixes for identified issues. It is also useful for developers who want to quickly review large codebases or documentation hosted on web pages. The tool works with Chromium-based browsers like Chrome and Edge, making it accessible to a wide range of users.

Pricing

The project is open source and available on GitHub. Users can download and install it for free by following the installation guide provided in the repository. There are no subscription fees or paid tiers mentioned for the current version of the tool.

Vibes

The project is hosted on GitHub under the name ContextSniper by the group egn-labs-dev. The code is released under the MIT License, which encourages community contributions. The project page welcomes bug reports, feature suggestions, and pull requests from the public. The tool is described as a lightweight solution built with native HTML, CSS, and JavaScript without external framework dependencies. The community reception focuses on its utility for authorized security research and its ability to streamline the manual steps involved in AI-driven security analysis.

Additional Information

ContextSniper was developed by egn-labs-dev and is maintained on the GitHub repository at github.com/egn-labs-dev/ContextSniper. The project adheres to Manifest V3 standards for modern browser extensions. It uses a service worker for background tasks and the Storage API to save user preferences locally. The developers have included a clear disclaimer stating that the tool is intended only for authorized penetration testing and security research. Unauthorized use of the tool is strictly prohibited. The project does not rely on any third-party server data collection, reinforcing its commitment to data privacy.