Free Online Hash Generator (MD5, SHA-256, SHA-512)
Compute cryptographic hash digests for any text input using industry-standard algorithms: MD5, SHA-1, SHA-256, and SHA-512. All hashing is performed using the browser's native Web Crypto API for maximum security and performance. Use hashes for password storage verification, data integrity checks, file fingerprinting, and checksum comparison. Nothing is sent to any server.
Common questions
Which hash algorithm should I use?
SHA-256 is the recommended default for most modern applications. MD5 and SHA-1 are considered cryptographically broken and should not be used for security-critical applications, but are still useful for checksums and non-security purposes.
Can I reverse a hash back to the original text?
No. Cryptographic hash functions are one-way by design — you cannot reverse a hash to recover the original input. This is what makes them useful for password storage and data integrity verification.
Why do MD5 and SHA-1 show a warning?
MD5 and SHA-1 have known collision vulnerabilities, meaning it's possible (though computationally expensive) to find two different inputs that produce the same hash. For security applications, use SHA-256 or SHA-512.