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SHA-256 Hash Generator

Generate SHA-256 hash from text instantly. Free online SHA-256 hash calculator using Web Crypto API. Secure, fast, and fully client-side.

Everything runs in your browser — your data is never sent to any server.

Why use a SHA-256 Hash Generator?

SHA-256 (Secure Hash Algorithm 256-bit) is a cryptographic hash function that produces a 256-bit hash value. It is part of the SHA-2 family and is widely used in security applications, blockchain technology, digital signatures, and certificate authorities. Our tool uses the browser's native Web Crypto API for maximum performance and security.

Key Features

  • Generate SHA-256 hash using the native Web Crypto API
  • Toggle between uppercase and lowercase output
  • Compare hashes for integrity verification

How to use

  1. Enter or paste your text in the input field
  2. The SHA-256 hash is generated instantly
  3. Copy the result or compare it with another hash

Technical Details

SHA-256 produces a 256-bit (32-byte) hash value, rendered as a 64-character hexadecimal string. It processes input in 512-bit blocks and uses 64 rounds of compression. SHA-256 is considered secure and is used in TLS, SSL, SSH, Bitcoin, and many other security protocols.

FAQ

Is SHA-256 secure?

Yes, SHA-256 is currently considered secure for all practical purposes. No practical collision attacks have been demonstrated against SHA-256 as of 2025.

What's the difference between SHA-256 and MD5?

SHA-256 produces a 256-bit hash (64 hex characters) while MD5 produces a 128-bit hash (32 hex characters). SHA-256 is much more secure and resistant to collision attacks.

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