Hash Generator
Security ToolsGenerate SHA-256, SHA-1, and MD5 hashes simultaneously
About Hash Generator
Computes MD5, SHA-1, SHA-256, and SHA-512 hash digests of any text input simultaneously. SHA-256 and SHA-512 are computed using the browser's native SubtleCrypto API (Web Crypto). MD5 and SHA-1 are computed in JavaScript since SubtleCrypto dropped support for cryptographically broken algorithms. Hash functions are deterministic one-way functions: the same input always produces the same output, but you cannot reverse the output to get the input. A single character change in the input produces a completely different hash (avalanche effect). These properties make hashes useful for integrity verification, fingerprinting, and as building blocks for authentication systems. SHA-256 is the right choice for new work — it is fast, universally supported, and has no known practical attacks. SHA-1 and MD5 have had collision attacks demonstrated against them and should not be used for security-critical purposes like certificate signing or password hashing. They remain useful for non-security checksums and legacy compatibility. For password storage specifically, none of these are appropriate — use a purpose-built password hashing function like bcrypt, scrypt, or Argon2 instead, which are intentionally slow to resist brute-force attacks.
How to Use Hash Generator Online
- Paste your data into the input field above
- The result appears instantly in the output area
- Click "Copy" to copy the result to your clipboard
Generate SHA-256, SHA-1, and MD5 hashes simultaneously. Runs 100% client-side — no data is sent to any server.