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SHA256 Generator

Generate SHA-256 hash from text.

How to Use SHA256 Generator

1

Paste the text or value you want to digest into the input field.

2

If you are matching a stored value, paste it exactly, including letter case and trailing spaces.

3

Click the "Process" button to compute the SHA-256 hash and read the 64-character hex digest.

4

Copy the digest to compare, sign, store, or use as a content-addressed filename.

Features

Standard 64-character hex digest, byte-identical to PHP hash() and sha256sum
Correctly hashes empty strings, unicode, emoji, and multi-line content as UTF-8
Useful for Git object IDs, blockchain references, ETags, and integrity checks
Shows the digest length so you can confirm you copied all 64 characters
No upload of input, so hashing internal values and secrets stays private
Free with unlimited use, and it works in any modern browser

Frequently Asked Questions

Not on its own. SHA-256 is deliberately fast, so a stolen database of password hashes can be attacked at billions of guesses per second. Use bcrypt, scrypt, or Argon2 with a per-user salt, which are deliberately slow and tunable.
It is e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855. Like the MD5 empty-string constant, seeing this in a log usually means a field was never set rather than a real value being hashed.
It outputs twice the bits, 64 hex characters instead of 32 or 40, and no practical collision attack is known. MD5 has practical collisions and SHA-1 has demonstrated chosen-prefix collisions, so SHA-256 is the correct default for anything new.
It is free, requires no sign-up, and there is no meaningful input limit because the algorithm is defined for arbitrary length input. Hashing runs in your browser, so nothing you paste is uploaded or logged.

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About SHA256 Generator

SHA-256 is the workhorse of modern hashing. It produces a 256-bit digest, written as 64 hexadecimal characters, and it is the member of the SHA-2 family that everything from Git object IDs to blockchain block references to TLS certificate fingerprints relies on. No practical collision attack is known against it.

The output is deterministic and standardised, so the same bytes always give the same 64 characters whether the computation happens in PHP, Node, Python, Go, or OpenSSL. That property is what lets independent systems agree on a fingerprint without talking to each other, and it is why a value copied out of a terminal lines up with a value generated by a web API.

One important caveat: SHA-256 is fast, which is exactly what you want for verifying integrity and exactly what you do not want for storing passwords. A fast hash lets an attacker try billions of guesses per second, so passwords should be run through bcrypt, scrypt, or Argon2 with a unique salt instead. This tool is for verification, content addressing, signing, and deduplication.

When to Use This Tool

  • Verifying a downloaded file against a published SHA-256 checksum
  • Building content-addressed filenames for a static asset cache
  • Generating a Git blob or tree object identifier for tooling
  • Checking a blockchain or transparency log entry reference
  • Creating a deterministic key for deduplicating uploaded files