Hash Generator
Generate SHA-1, SHA-256 and SHA-512 hashes. Uses browser WebCrypto API — your data never leaves your device.
Cryptographic hash functions transform input data of any size into a fixed-length string (the hash or digest) in a one-way operation — you cannot reconstruct the original input from the hash. Hashes are used for data integrity verification (checksums), password storage, digital signatures, and fingerprinting files. This tool generates SHA-1, SHA-256, and SHA-512 hashes of any text input, using the browser's built-in WebCrypto API so your data never leaves your device.
📋 How to Use This Calculator
Type or paste the text you want to hash into the input field and click "Generate Hashes." The tool uses the browser's SubtleCrypto API to compute SHA-1, SHA-256, and SHA-512 digests simultaneously. All three hashes appear as hexadecimal strings with individual Copy buttons. SHA-256 is the most commonly requested hash (used in TLS certificates, Git, JWT, and checksums). SHA-512 provides extra security margin. SHA-1 is shown for compatibility but is considered cryptographically broken for security purposes.
💡 Key Facts & Information
SHA (Secure Hash Algorithm) is a family of cryptographic hash functions standardized by NIST. SHA-256 produces a 256-bit (32-byte, 64 hex character) digest. SHA-512 produces a 512-bit (64-byte, 128 hex character) digest. SHA-1 produces a 160-bit (20-byte, 40 hex character) digest but is vulnerable to collision attacks and should not be used for security-critical applications. The WebCrypto API (crypto.subtle.digest) used here is the same API that web browsers use for TLS handshakes and web application security — it is based on highly optimized, vetted cryptographic implementations. This tool does not support MD5 (weak) or bcrypt/argon2 (for password hashing — require server-side processing).