Hash Generator
Generate cryptographic hashes (SHA-256, SHA-1, SHA-384, SHA-512) from any text using the browser's Web Crypto API. Instant, secure, and private — nothing is sent to any server.
What Are Hash Functions?
A cryptographic hash function takes any input and produces a fixed-length string of hexadecimal characters called a digest. The same input always yields the same hash, but even a single-character change produces a completely different output. This property, known as the avalanche effect, makes hash functions essential for verifying data integrity, storing passwords securely, generating digital signatures, and creating checksums for file verification.
Supported Algorithms
- SHA-256 — 64-character hex output, used in TLS certificates and blockchain
- SHA-384 — 96-character hex output, stronger SHA-2 variant
- SHA-512 — 128-character hex output, maximum digest length
- SHA-1 — 40-character hex output, legacy only (collision-vulnerable)
How This Hash Generator Works
Type or paste your text and click Generate. The tool uses the browser's built-in Web Crypto API (crypto.subtle.digest) to compute all four hash algorithms simultaneously. The input is encoded to UTF-8 bytes, passed through each algorithm, and the resulting byte arrays are converted to hexadecimal strings. Because the Web Crypto API runs natively in the browser, hashing is fast and your data never leaves your device. Each hash can be copied individually with one click.
When to Use Each Hash Algorithm
Use SHA-256 for most purposes including file integrity checks, API signature verification, and content-addressable storage. SHA-384 and SHA-512 offer larger digest sizes for applications requiring extra collision resistance, such as government or financial systems. Avoid SHA-1 for any security-critical purpose, as practical collision attacks have been demonstrated since 2017. SHA-1 remains useful only for legacy system compatibility and non-security checksums where collision resistance is not a concern.