It's generally not safe to share your entire .git folder without checking its contents first. While Git doesn't store credentials directly in the .git folder, it may contain sensitive information like local configuration details or private repository URLs. Before sharing, review your .git/config for any personal or sensitive data, and sanitize your commit history if necessary. If you're unsure, it's safer to share your project by excluding the .git folder entirely, ensuring only the project files are shared.