Hash Generator
Generate MD5, SHA-1, SHA-256 hashes
Calculator
How to Use
Generate cryptographic hashes
Enter text
Input the text to hash
Select algorithm
Choose MD5, SHA-1, SHA-256, etc.
Generate hash
See the hash value
Copy hash
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Frequently Asked Questions
A hash is a fixed-length fingerprint of data. Used for: password storage (never store plain text!), file integrity verification, digital signatures, data deduplication. Same input always produces same hash; different inputs produce different hashes.
For passwords: use bcrypt, scrypt, or Argon2 (designed to be slow). For file integrity: SHA-256 is standard. MD5 and SHA-1 are cryptographically broken - dont use for security. For non-security checksums, MD5 is fast and fine.
Hashes are one-way by design - you cannot mathematically reverse them. However, common passwords can be found via rainbow tables (precomputed hashes). Thats why passwords are salted (random data added) before hashing.
Collision attacks can find two inputs with same hash. For MD5, collisions are easy to create. SHA-1 is theoretically broken. This matters for signatures and certificates. For simple checksums, theyre still useful but not for security.