Hash Generator
DeveloperGenerate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text. Essential for checksums, data integrity, and security testing.
What is This Tool?
A hash generator computes cryptographic hash digests of text and files using algorithms including MD5, SHA-1, SHA-256, SHA-384, SHA-512, and more. Hash functions produce fixed-size fingerprints from arbitrary input — essential for data integrity, password storage, and digital signatures.
Cryptographic hashes are one-way functions: given a hash, it is computationally infeasible to find the original input. SHA-256 produces a 256-bit (64-hex-character) digest regardless of input size. MD5 and SHA-1 are considered broken for security but remain useful for checksums and non-security fingerprinting.
Common Use Cases
File Integrity Verification
Compute and compare file hashes (SHA-256) to verify downloads, detect tampering, and validate data transfers.
Password Hashing Reference
See how password hashing works — though production systems should use bcrypt/scrypt/Argon2 instead of raw SHA.
API Signature Verification
Compute hash digests for verifying webhook signatures, API request signing, and message authentication.
Blockchain & Crypto
Compute SHA-256 double hashes and understand the hashing that underpins Bitcoin mining and Merkle trees.
Frequently Asked Questions
Which algorithm should I use?
SHA-256 for general security. SHA-512 for extra strength. SHA-1/MD5 only for non-security checksums. For passwords, use bcrypt/Argon2 instead.
Are MD5 and SHA-1 safe?
MD5 and SHA-1 are cryptographically broken — collisions can be found. They are fine for checksums and cache keys but should never be used for security or password hashing.
Can I reverse a hash?
No. Cryptographic hashes are one-way functions by design. You cannot derive the input from the output. Rainbow tables can match known inputs but do not "reverse" the hash.