SHA256 Hash Generator

To convert text to SHA256, paste the string into Input text, select UTF-8, and click Run. If Auto / Live is enabled, the result appears as you type.

The default Hex (lower) format gives you a 64-character SHA-256 digest that you can copy with the Copy button.

No. SHA-256 is hashing, not encryption. It produces a one-way digest and has no decryption key that restores the original input.

Search terms such as SHA256 encryption, SHA256 encryptor, or SHA256 decrypt are sometimes used loosely, but a SHA256 hash calculator does not encrypt or decrypt text.

A single, fast SHA-256 hash is not suitable for storing passwords. Attackers can test many password guesses against fast hashes.

For password storage, use a purpose-built algorithm such as Argon2id, bcrypt, or scrypt with a unique salt and appropriate cost parameters. SHA-256 remains useful for checksums and other non-password hashing tasks.

SHA-256 computes a digest from input bytes alone. HMAC-SHA256 combines a message with a secret key to produce an authentication code.

Use the Enable HMAC switch when validating signed webhooks, working with keyed API signatures, or checking messages that rely on a shared secret. Standard SHA-256 and HMAC-SHA256 produce different results even when the message is identical.

If two online SHA256 calculators disagree, their input bytes may not actually be the same. Common causes include:

• Extra spaces or line breaks.
• Uppercase and lowercase differences.
• Different input encodings, such as UTF-8 and UTF-16LE.
• Interpreting Hex or Base64 as decoded bytes instead of ordinary text.
• HMAC mode being enabled on one side.
• Comparing a Hex digest with the same digest represented in Base64.

For a correct comparison, use the same bytes and settings on both sides.

A SHA-256 digest is always 256 bits (32 bytes) long. It appears as 64 hexadecimal characters with Hex output or 44 Base64 characters, including padding, with Base64 output.

The length stays the same whether you hash a single word or a large block of text.

Generate the SHA-256 digest from your data, then compare the complete result with a trusted SHA256 checksum. If they match, the content is consistent with that checksum.

Make sure both values were computed from exactly the same bytes. For an authenticity check, the expected checksum must come from a source you trust.

This online SHA256 generator processes text and supported encoded input. For files such as ZIP archives, images, or software downloads, use a dedicated SHA256 file checksum calculator that hashes the original file bytes.

Pasting a filename or converting a binary file to text will not generally produce its actual file checksum.

There is no built-in way to reverse a SHA-256 digest into the original message. The hashing process is one-way.

Services described as SHA256 decoders or SHA256 decryptors may instead look for matching values in lists of known inputs. They are not reversing the algorithm.

SHA-256 is one member of the SHA-2 family. Related algorithms include SHA-224, SHA-384, and SHA-512. They use different parameters and produce digests of different lengths.

When a service specifically requests SHA-256, use a SHA256 hash generator rather than another SHA-2 variant.