ZIP file password removal

Removal of a password from an encrypted zip file can be easy or hard depending on the complexity of the password. Using a tool such as John the Ripper you can break out the password by matching the computed hash at a rate of millions of attempts per second. So a strong password should be used to ensure security of the file.

Try our free on-line password recovery tool below to quickly check a password protected zip file for a weak password.

Do not use this form to upload confidential or sensitive zip files as to extract the hash from the file you need to upload the file to our server. We take security seriously but this should be kept in mind when using any cloud based service. *See below for more information

Uploading File: {{}}

Searching for Password to open file {{}}
Success!! The password for {{}} was found: {{ submitresponse }}
Processing complete, the password for {{}} was not found.
Error starting job, please check file is valid.

Digging into Zip file Password Removal

John the Ripper (a password recovery program) comes with a utility called zip2john that is used to extract the encrypted hash from the file. This hash is the key to the file. When attacking the file in an effort to “crack” the password you use this hash to try and find a matching known string.

By attacking the hash it saves you having to type passwords into zip file password prompt millions of times, so getting the hash out is a good thing! As is the two most common password cracking tools, that being the aforementioned John the Ripper and Hashcat (also cudaHashcat). These are open source tools that are the worlds best at cracking password protected files and application hashes.