SHA-256 Generator

Runs in browser Security

Compute SHA-256 digests locally with WebCrypto. Output as lowercase/uppercase hex or Base64, and compare against an expected hash.

Privacy: This tool runs entirely in your browser. Your input never leaves your device.

How to use SHA-256 Generator

  1. Paste the text to hash.
  2. Select the output format.
  3. Paste an expected hash to verify a match.
  4. Copy or download the digest.

SHA-256 Generator features

  • SHA-256 computed with WebCrypto — fast and fully local
  • Lowercase/uppercase hex, Base64, Base64url and binary output
  • Compare against an expected digest (accepts "sha256=" prefixes)
  • Whitespace trimming to match printf-style inputs
  • Live hashing with input size and byte count

SHA-256 Generator example

SHA-256 of "abc"

Input:

abc

Output:

ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad

Frequently asked questions about SHA-256 Generator

Is SHA-256 suitable for storing passwords?

Not on its own. It is fast, which helps attackers. Use a purpose-built password hash (Argon2id, bcrypt or scrypt) with a salt. SHA-256 is ideal for integrity checks, content addressing, HMAC and signatures.

How do I verify a downloaded file's checksum?

Paste the published hash in "Compare with expected hash". For files, compute the digest with "sha256sum file" (Linux/macOS) or "Get-FileHash file" (PowerShell) and compare — this tool hashes text, not uploaded files.

Uppercase or lowercase hex — does it matter?

They represent the same bytes. Most tools print lowercase; the comparison here ignores case and also accepts Base64.

What is the output size?

256 bits: 64 hex characters or 44 Base64 characters (43 without padding).

Technical notes

SHA-256 belongs to the SHA-2 family standardised in FIPS 180-4 and is the default choice for integrity checks, HMAC, TLS and code signing. The digest is deterministic: the same UTF-8 bytes always produce the same 256-bit value.