8 min read
2026-02-09
A checksum (hash) is a fixed string of characters computed from file data. Any change to the file results in a completely different hash.
| Algorithm | Hash Length | Security | Speed |
|---|---|---|---|
| MD5 | 128 bits | Low (deprecated) | High |
| SHA-1 | 160 bits | Low (deprecated) | High |
| SHA-256 | 256 bits | High | Medium |
| SHA-512 | 512 bits | Very high | Medium |
The algorithm accepts data of any size
Performs mathematical transformations
Returns a fixed-length string
Irreversibility: data cannot be recovered from the hash
Upload a file or enter text
Choose a hashing algorithm
Get the checksum
Compare with the reference value
Calculate a hash with the Checksum Calculator.
See also: Password Strength, URL Validator