Handling JSON Web Tokens (JWTs) securely is crucial for protecting user data and preventing security breaches. To achieve this, developers should follow three best practices: keeping JWTs secret by ensuring they are transmitted securely over HTTPS, validating JWTs before trusting them, and setting an expiration time on JWTs to limit their validity period. By implementing these measures, developers can prevent attackers from using old or compromised tokens to gain unauthorized access to applications. Additionally, using tools like Snyk can help identify security issues related to JWTs, such as insecure encryption algorithms or outdated dependencies, and provide actionable recommendations for remediation. By following these best practices and leveraging Snyk's comprehensive security scanning capabilities, developers can ensure their web applications are secure, compliant with industry standards, and protected from vulnerabilities and risks.