Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes instantly. All processing is local — your data never leaves your browser.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text. All hashing is performed in your browser using the Web Crypto API — your text is never transmitted.
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FAQ
Should I use MD5 or SHA-1 for passwords?▼
No. MD5 and SHA-1 are cryptographically broken for security purposes. Never use them to hash passwords. Use bcrypt, Argon2, or scrypt instead. SHA-256/512 are acceptable for checksums.
Are hashes reversible?▼
No. Hash functions are one-way — you cannot derive the original text from the hash. However, short or common inputs can be found via rainbow tables.
What is a hash used for?▼
Hashes verify file integrity, store password fingerprints, generate content-based IDs (e.g., Git commit hashes), and create digital signatures.
Frequently Asked Questions
Which hash algorithm should I use?
Use SHA-256 or SHA-512 for modern security applications. MD5 and SHA-1 are cryptographically broken and should not be used for security purposes — only for legacy compatibility or non-security checksums.
Is my data sent to a server?
No. All hashing is performed entirely in your browser using the Web Crypto API (SHA family) and a pure JavaScript MD5 implementation. Your data never leaves your device.
What is the difference between MD5 and SHA-256?
MD5 produces a 128-bit (32 hex char) hash and is fast but cryptographically broken. SHA-256 produces a 256-bit (64 hex char) hash and is considered secure for all modern applications.