developer utility
Hash Generator (MD5, SHA-1, SHA-256, SHA-512)
Generate MD5, SHA-1, SHA-256, or SHA-512 hashes from any input text, all computed locally in your browser.
Quick Answers
- Is SHA-256 reversible?
- No hash function is reversible by design, including SHA-256. Given a hash output, there's no way to mathematically recover the original input — you can only compare it against a new hash of a guessed input.
- Is SHA-256 safe for hashing passwords?
- SHA-256 alone is not recommended for password storage because it's fast to compute, making brute-force attacks feasible. Use a purpose-built password hashing algorithm like bcrypt, scrypt, or Argon2 instead, which are deliberately slow and salted.
- Does this happen in my browser or on a server?
- Every SHA-256 hash is computed locally using your browser's built-in cryptography APIs (or an in-browser implementation). Your input text never leaves your device.
All decoding happens entirely in your browser. No data is ever sent to a server — nothing you paste here is transmitted, logged, or stored.
Frequently asked questions
Is SHA-256 reversible?
No hash function is reversible by design, including SHA-256. Given a hash output, there's no way to mathematically recover the original input — you can only compare it against a new hash of a guessed input.
Is SHA-256 safe for hashing passwords?
SHA-256 alone is not recommended for password storage because it's fast to compute, making brute-force attacks feasible. Use a purpose-built password hashing algorithm like bcrypt, scrypt, or Argon2 instead, which are deliberately slow and salted.
Does this happen in my browser or on a server?
Every SHA-256 hash is computed locally using your browser's built-in cryptography APIs (or an in-browser implementation). Your input text never leaves your device.
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