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SHA-256 Hash Generator

Compute the SHA-256 hash of any text instantly. 64-character hex output, calculated locally in your browser.

Hash Generator

Use this tool directly in your browser — no signup required.

Use Hash Generator

100% private — files are processed locally and never uploaded.

How to SHA-256 Hash Generator

  1. 1

    Enter or paste your text

    Type or paste the string you want to hash. Every character matters — even trailing whitespace changes the output.

  2. 2

    Generate the hash

    Click generate. The SHA-256 algorithm produces a 256-bit (64 hex character) digest of your input.

  3. 3

    Copy the hash value

    Copy the hex string for use in integrity checks, comparisons, or as a unique identifier.

SHA-256: The Default Hash for Modern Systems

SHA-256 produces a 256-bit hash — a 64-character hexadecimal string that serves as a unique fingerprint of the input. Change one bit of the input and the entire hash changes unpredictably. This makes it useful for verifying that data hasn't been altered.

It's the hash function behind Bitcoin's proof-of-work, SSL/TLS certificate signatures, and most file integrity verification systems. When a software download page lists a SHA-256 checksum, you can hash the downloaded file and compare — if they match, the file hasn't been tampered with or corrupted.

SHA-256 is part of the SHA-2 family designed by the NSA and published by NIST. As of today, no practical collision attacks exist against it. It's considered secure for all standard applications, from HMAC authentication to content-addressable storage.

Frequently Asked Questions

Can I reverse a SHA-256 hash to get the original text?

No. SHA-256 is a one-way function. There's no mathematical way to compute the input from the output. The only approach is brute-force guessing, which is computationally infeasible for anything beyond very short, simple inputs.

Is SHA-256 safe for hashing passwords?

On its own, no. SHA-256 is too fast — attackers can compute billions of hashes per second. Password hashing requires deliberately slow algorithms like bcrypt, scrypt, or Argon2 that add computational cost to resist brute-force attacks.

What's the difference between SHA-256 and SHA-512?

SHA-512 produces a 512-bit (128 hex character) hash and uses 64-bit operations internally. On 64-bit processors, SHA-512 is actually faster than SHA-256. Both are equally secure for practical purposes; SHA-256 is more commonly used.