SHA-256 Hash Generator

Generate a SHA-256 hash of any text online instantly — free SHA256 hash generator.

About

About the SHA-256 Hash Generator

SHA-256 produces a 256-bit digest, shown as 64 hex characters, and is the most widely used general-purpose hash today — it secures TLS certificates, underpins Bitcoin's proof-of-work, and is the default choice for checksums and password-storage building blocks across modern software.

A common reason a SHA-256 doesn't match is a hidden newline: echo "hello" | sha256sum hashes "hello" plus a line break, while this tool hashes exactly what's in the box. Use printf or echo -n on the command line to compare like for like. This generator hashes text, not files — to check a downloaded file's checksum, run sha256sum, shasum -a 256 or certutil on the file itself.

Choose what to view about this tool

Guide

Using the SHA-256 Hash Generator

  1. 1

    Step 1

    Type or paste your text into the box.

  2. 2

    Step 2

    Click Generate hashes to compute it entirely in your browser, using the Web Crypto API.

  3. 3

    Step 3

    SHA-256 is one of the four results in the table — SHA-1, SHA-256, SHA-384 and SHA-512 are all computed at once.

  4. 4

    Step 4

    Copy the SHA-256 value from the table.

  • Generates a 64-character SHA-256 hash in lowercase hex
  • Matches sha256sum, shasum -a 256 and Python's hashlib for the same UTF-8 text
  • Changing a single character produces a completely different hash
  • Shows SHA-1, SHA-256, SHA-384 and SHA-512 together, so you can compare all four
  • Uses your browser's built-in Web Crypto API — the text never leaves your device
  • Free, with no sign-up and no limit on how many hashes you generate

Backend developers

Developers check the SHA-256 their code computes for a known test string.

Blockchain learners

Learners experiment with the hash function Bitcoin is built on.

Data engineers

Engineers preview how an ID or email will look once it's hashed for a pseudonymised dataset.

QA testers

Testers generate expected values for test cases.

Generate another hash

SHA-1 Generator SHA-384 Generator SHA-512 Generator

Examples

SHA-256 Hash Generator examples

3 worked examples

01

Hashing a short word

Type "hello" and the SHA-256 result is 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824 — always 64 hex characters, no matter the input length.

02

Hashing an empty input

With the box empty, SHA-256 still produces a fixed-length digest: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b85.

03

A classic test sentence

Type "The quick brown fox jumps over the lazy dog" to get d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592, a widely used SHA-256 test vector.

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FAQ

Frequently asked questions

Quick answers to common questions about the SHA-256 Hash Generator.

How do I generate a SHA-256 hash?

Type or paste your text above and click Generate hashes. The SHA-256 value appears in the results table — hashing happens directly in your browser, using the Web Crypto API.

Is SHA-256 free to use?

Yes. It's free, with no sign-up and no limit on how much text you hash.

Why is SHA-256 so widely used?

It's fast, has no known practical collision attacks, and its 256-bit output is large enough to make brute-forcing infeasible — which is why it secures everything from HTTPS certificates to Bitcoin blocks and most software download checksums.

Should I use SHA-256 to hash passwords directly?

No — for password storage use a slow, salted algorithm designed for it, like bcrypt or Argon2. SHA-256 is fast by design, which makes plain password hashes with it easier to brute-force offline.

Is my text safe when I hash it here?

Yes. Everything runs directly in your browser using the Web Crypto API — nothing is uploaded anywhere.

How long is a SHA-256 hash?

256 bits, shown as 64 hexadecimal characters.

Why does my SHA-256 hash differ from another tool's?

A single extra character — a trailing space, a line break added by your editor, or text saved in a different encoding — produces a completely different SHA-256. This tool hashes exactly what's in the box, as UTF-8.

Can I check a downloaded file's SHA-256 here?

Not on this page. Use the File Hash Calculator, which reads the file itself in your browser and shows its SHA-256 to compare with the checksum the publisher lists.

Is SHA-256 the same as SHA-2?

SHA-256 is one member of the SHA-2 family, which also includes SHA-224, SHA-384 and SHA-512. People often say SHA-2 when they mean SHA-256, because it's the most widely used one.

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