ENCODING TOOL · CLIENT-SIDE
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input. All hashing happens in your browser — nothing is sent anywhere.
About Hashing
One-way function
Hashes cannot be reversed. You can go from input to hash, but never from hash back to input.
Fixed length
Regardless of input size, the output is always the same length (e.g., SHA-256 = 64 hex characters).
Avalanche effect
Changing even one bit of input completely changes the output hash.
Frequently Asked Questions
What is a hash?
A hash is a fixed-length string generated from input data using a mathematical algorithm. Even a tiny change in the input produces a completely different hash. Hashes are used for verifying data integrity, storing passwords securely, and creating digital signatures.
What hash algorithm should I use?
For data integrity and file verification, SHA-256 is the modern standard. MD5 and SHA-1 are fast but have known collision vulnerabilities — use them only for checksums, not security-critical applications. For password hashing, use specialized algorithms like bcrypt, scrypt, or Argon2.
Are hashes reversible?
No. Hashes are one-way functions — you cannot reverse a hash back to the original input. However, weak passwords or common inputs can be matched using rainbow tables (precomputed hash databases). This is why password storage uses salted hashes.