Hash Generator
Generate cryptographic hashes instantly. Supports SHA-256, SHA-1, SHA-512, and MD5. Uses the Web Crypto API for secure browser-based hashing. Free, no signup.
About this tool
Cryptographic hash functions convert any input into a fixed-length string of characters that acts as a digital fingerprint. Even the slightest change in the input produces a completely different hash, making them invaluable for data integrity verification, password storage, and digital signatures.
SHA-256 and SHA-512 are part of the SHA-2 family and are widely used in modern security applications including TLS/SSL certificates and blockchain technology. SHA-1 and MD5 are legacy algorithms -- they should not be used for security-critical applications due to known collision vulnerabilities. All hashing in this tool runs entirely in your browser via the Web Crypto API (for SHA) and a client-side implementation (for MD5). No data is ever sent to a server.
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Hash functions are one-way -- you cannot reverse a hash back to the original input. For security-sensitive use cases like password storage, always use SHA-256 or SHA-512.
Frequently Asked Questions
What hash algorithms are supported?
The tool supports SHA-256 (most commonly used), SHA-1 (legacy), SHA-512 (strongest), and MD5 (legacy, not recommended for security). SHA-256 is the recommended default for most use cases.
Is MD5 still safe to use?
MD5 is considered cryptographically broken and should not be used for security purposes like password hashing. However, it's still useful for checksums and non-security applications. Use SHA-256 for security-sensitive hashing.
How is the hash generated?
SHA hashes are generated using the Web Crypto API (SubtleCrypto.digest), which is built into all modern browsers. MD5 uses a client-side implementation. No data leaves your browser.