SHA-256 Hash Generator

Generate SHA-256 and SHA-512 digests from any text.

Hashing runs in your browser Native WebCrypto No upload

This page computes both digests locally with the browser’s built-in crypto.subtle API. The text you enter is never sent anywhere, and no third-party script runs on this page.

SHA-256 64 hex characters
SHA-512 128 hex characters

What is a SHA-256 hash generator?

A SHA-256 hash generator converts text into a fixed 256-bit hash value using the SHA-2 family of cryptographic algorithms. Unlike MD5, SHA-256 has no known practical collision attacks, making it suitable for security-sensitive checksums and digital signatures.

How to use this SHA-256 generator

  1. Type or paste your text into the input field.
  2. Click Generate hash to compute the SHA-256 and SHA-512 values.
  3. Toggle Uppercase output if you need capital letters.
  4. Copy either hash with the button below each result.

When do you need SHA-256?

SHA-256 is used for verifying file integrity, generating commit hashes in Git, securing blockchain transactions, signing TLS certificates, and creating tamper-evident fingerprints of data. This tool runs the hashing entirely in your browser using the native WebCrypto API.

Frequently asked questions

What is SHA-256?
SHA-256 is a cryptographic hash function that produces a 256-bit (64 hex character) output from any input. It is part of the SHA-2 family and is widely used in security applications, including blockchain, TLS certificates, and digital signatures.
SHA-256 vs SHA-512?
SHA-512 produces a longer 512-bit hash and uses 64-bit internal operations, which can be faster on 64-bit hardware. SHA-256 is more common and produces a shorter, still highly secure, 256-bit hash. Both are considered cryptographically strong.
Is SHA-256 secure for passwords?
SHA-256 alone is fast to compute, which makes brute-force attacks against weak passwords easier. For password storage, use a dedicated slow hashing algorithm like bcrypt or Argon2 instead of a plain SHA-256 hash.
SHA-256 for file checksums?
Yes — SHA-256 is a strong choice for verifying file integrity and authenticity, since it has no known practical collision attacks, unlike MD5 or SHA-1. Many software downloads publish a SHA-256 checksum for verification.