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SHA hash generator

Generate SHA-256, SHA-512 or SHA-1 hashes from any text. Uses the native Web Crypto API — your data never leaves the browser.

sha-256
Hash will appear here

What is SHA Hash Generator?

SHA (Secure Hash Algorithm) is a family of cryptographic hash functions published by NIST. SHA-256 produces a 256-bit (64-character hex) hash, SHA-512 produces a 512-bit (128-character hex) hash, and SHA-1 produces a 160-bit (40-character hex) hash. These algorithms are used for data integrity verification, digital signatures, SSL certificates, blockchain, and password hashing. This tool uses your browser's native Web Crypto API (crypto.subtle.digest) for hardware-accelerated hashing that is both fast and secure. SHA-256 is the gold standard for most security applications — it is used in Bitcoin mining, TLS certificates, and code signing. SHA-512 offers even stronger security for sensitive applications. SHA-1, while deprecated for security use, is still used in Git commit hashes and legacy systems.

How to Use SHA Hash Generator

  1. 1

    Select your algorithm

    Choose SHA-256 (default, most common), SHA-512 (strongest), or SHA-1 (legacy compatibility). The hash regenerates instantly when you switch.

  2. 2

    Enter your text

    Type or paste the text you want to hash. The hash output updates in real time as you modify the input.

  3. 3

    Copy the hash

    Click Copy to grab the hex-encoded hash string. The character count is shown so you can verify the algorithm output length.

Features

  • SHA-256, SHA-512, and SHA-1 algorithms
  • Native Web Crypto API — hardware accelerated
  • Real-time hashing as you type
  • Full Unicode and emoji support
  • Shows hash length for algorithm verification
  • 100% client-side — data never leaves your browser

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Frequently Asked Questions

Which SHA algorithm should I use?+
SHA-256 is the best default for most uses — it is secure, widely supported, and fast. Use SHA-512 for extra security in sensitive applications. Avoid SHA-1 for security purposes as it has known collision attacks.
Is SHA-256 used in Bitcoin?+
Yes. Bitcoin uses double SHA-256 (SHA-256 applied twice) for mining proof-of-work, transaction hashing, and Merkle tree construction. It is also the basis for many other blockchain protocols.
How is this different from MD5?+
SHA-256 is cryptographically stronger than MD5. MD5 produces a 128-bit hash and has known collision vulnerabilities. SHA-256 produces a 256-bit hash with no known practical attacks, making it suitable for security applications.
Can I use SHA-256 for password hashing?+
SHA-256 alone is too fast for password hashing (enabling brute-force attacks). Use purpose-built password hashing algorithms like bcrypt, scrypt, or Argon2 that include salting and intentional slowness.
Why does SHA-512 produce a longer hash than SHA-256?+
SHA-512 uses a 512-bit internal state and produces a 128-character hex output (vs 64 for SHA-256). The longer hash provides a larger collision space, but both are considered secure for current applications.
Is the Web Crypto API secure?+
Yes. The Web Crypto API is a W3C standard built into all modern browsers. It provides hardware-accelerated cryptographic operations that are both fast and secure, with implementations audited by browser vendors.