ReFlutter is a reverse engineering framework designed specifically for Flutter mobile applications. The tool uses a patched version of the Flutter library to enable comprehensive analysis of Flutter apps through repacking techniques. The framework modifies core Flutter components to facilitate dynamic analysis. It patches the snapshot deserialization process to enable runtime inspection of application behavior. The tool also modifies socket.cc files to monitor network traffic and patches dart.cc to output class and function information during execution. ReFlutter supports manual code modifications within Flutter applications, allowing researchers to inject custom analysis code or modify application behavior for testing purposes. The framework provides compatibility with both Android and iOS Flutter engines, making it suitable for cross-platform mobile application analysis. The tool integrates with Burp Suite for comprehensive traffic interception and analysis capabilities. This integration enables security researchers to monitor and analyze network communications from Flutter applications during dynamic analysis sessions. ReFlutter is primarily used by security researchers, malware analysts, and mobile application security testers who need to examine Flutter-based mobile applications for security vulnerabilities, reverse engineer application logic, or understand application behavior patterns.