Check if a ZIP archive is password protected. Detect ZipCrypto or AES-256 encryption type and check password strength. Private and secure.
Type or paste your password into the input checker field.
View real-time feedback on entropy, crack time, and strength metrics.
Get secure recommendations for making your ZIP files uncrackable.
Your data is processed entirely inside your browser using client-side JavaScript. Nothing ever travels over a network to any server — making BunchTool the most private option available.
Because everything runs locally in your browser, there are no upload queues or server wait times. Results appear in seconds regardless of your internet speed — or even without any connection at all.
Validate the resistance of your passwords against brute force and dictionary attacks. Secure your data with reliable mathematical feedback.