Physics Tools > Password recovery tool

This online password recovery tool for security professionals, which can be used to recover a password if its MD5 MD4 SHA1 hash is known. MD5 / SHA1 are an industry standard hash algorithm that is used in many applications to store passwords.

The table below shows the time required for password Attack depending on the password length and used character set. It is assumed that the attack is carried out on a single computer and the attack force speed is 500 000 passwords per second.

  Hash Conversion Tool  |  Passwords Generator with Hashes  |  Password Strength  |  Top 2000+ most common passwords

Length of the password Character set
lowercase letters lowercase letters and digits Both lowercase and uppercase letters all printable ASCII characters
< = 4 instant 2 min
5 instant 2 min 12 min 4 hours
6 10 min 72 min 10 hours 18 days
7 4 hours 43 hours 23 days 4 years
8 4 days 65 days 3 years 463 years
9 4 months 6 years 178 years 44530 years


The MD4, MD5 and SHA-1 algorithms are secure hash functions. They take a string input, and produce a fixed size number - 128 bits for MD4 and MD5; 160 bits for SHA-1. This number is a hash of the input - a small change in the input results in a substantial change in the output. The functions are thought to be secure, in the sense that it would require an enormous amount of computing power to find a string which hashes to a chosen value.


MD4 / MD5 / SHA1 Hash Conversion Tool

Input
Convert To:
Result

US Secure Hash Algorithm 1 (SHA1)

The SHA-1 is called secure because it is computationally infeasible to find a message which corresponds to a given message digest, or to find two different messages which produce the same message digest. Any change to a message in transit will, with very high probability, result in a different message digest, and the signature will fail to verify.


The MD5 Message-Digest Algorithm

MD5 message-digest algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. It is conjectured that it is computationally infeasible to produce two messages having the same message digest, or to produce any message having a given prespecified target message digest.



Random Passwords Generator with Hashes

First character can be: Number Lowercase Uppercase Other
Latter characters can be: Number Lowercase Uppercase Other
Password length:
Extra password characters:


Password Strength Analyzer

Your online accounts, computer files, and personal information are more secure when you use strong passwords to help protect them.

Test the strength of your passwords: Enter a password in the text box to have Password Checker help determine its strength as you type.

Note: Password Checker can help you to gauge the strength of your password. It is for personal reference only. Password Checker does not guarantee the security of the password itself.

Password:
Strength:
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Top 2000+ most common passwords

This is a list of passwords most commonly seen on past years, sorted for decreasing number of occurrences (that is, more common passwords are listed first).

This table shows MD5 Hash and SHA1 hash for each Top 2000+ passwords, so it will be help full for you to find the passwords for known hash values.