Which hash algorithm should I use?

For modern applications use SHA-256 or SHA-512. SHA-1 is considered cryptographically weak and should only be used for legacy compatibility. SHA-384 and SHA-512 offer the strongest guarantees and are preferred for security-critical work.

Is my input sent to a server?

No. All hashing is performed entirely in your browser using the Web Crypto API (crypto.subtle.digest). Your text never leaves your device.

Can I reverse a hash to get the original text?

No. Cryptographic hash functions are one-way: the same input always produces the same output, but the output cannot be reversed to recover the input. This property is fundamental to their use in security.

Hash Generator

Generate SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic hashes from any text.

$input text

lines

0 chars1 lines

SHA-1

—

SHA-256

—

SHA-384

—

SHA-512

—

Related Tools

#HMAC Generator

Generate HMAC-SHA-256/384/512 message authentication codes using a secret key.

***Password Generator

Generate strong, random passwords with customizable options.

#UUID Generator

Generate random UUIDs (v4) for use as unique identifiers.

FAQ

Which hash algorithm should I use?: For modern applications use SHA-256 or SHA-512. SHA-1 is considered cryptographically weak and should only be used for legacy compatibility. SHA-384 and SHA-512 offer the strongest guarantees and are preferred for security-critical work.
Is my input sent to a server?: No. All hashing is performed entirely in your browser using the Web Crypto API (crypto.subtle.digest). Your text never leaves your device.
Can I reverse a hash to get the original text?: No. Cryptographic hash functions are one-way: the same input always produces the same output, but the output cannot be reversed to recover the input. This property is fundamental to their use in security.

Compute cryptographic hash digests from arbitrary text using the browser-native Web Crypto API. Supports SHA-1, SHA-256, SHA-384, and SHA-512 algorithms. All hashing happens client-side — your input never leaves the browser. Useful for verifying data integrity, creating checksums, or understanding hash outputs for development and security work.