Result can be output in Hex, Base64, or Base64URL, and compared with an expected hash. Useful for checksum, payload verification, test data, logs, API debugging, and documentation.

SHA-256 is not encryption: the hash cannot be decrypted back to the original text.

Processing runs locally in your browser.

Computes SHA-256 via Web Crypto API
Supports Hex, Base64, and Base64URL
Can compare with expected hash
Shows input size and result format
Suitable for checksum, payload, tests, and API debugging
Runs in the browser
Data is not sent to the server
No registration required

Frequently Asked Questions

What is SHA-256?

SHA-256 is a cryptographic hash function that maps input data to a fixed-length hash. Even a small input change produces a different result.

Can SHA-256 be decrypted back?

No. SHA-256 is a one-way hash function, not encryption. The original text cannot be recovered from the hash.

How is Hex different from Base64?

Hex represents hash bytes as hexadecimal characters, usually 64 characters for SHA-256. Base64 is shorter and common in APIs and tokens.

Can I verify whether a hash matches?

Yes. Enable comparison with expected hash, paste the reference value, and the tool shows whether it matches the computed SHA-256.

Is SHA-256 suitable for password storage?

Plain SHA-256 is not recommended for passwords. Use dedicated algorithms with salt and cost settings such as Argon2, bcrypt, or scrypt.

How is SHA-256 different from HMAC-SHA256?

SHA-256 computes a plain hash of data. HMAC-SHA256 uses a secret key for API request signing and message authentication.

Can I hash a file?

This service is for text. For files, use a dedicated file checksum tool that hashes files locally in the browser.

Is my data sent to the server?

No. Processing runs locally in your browser and data is not sent to the server.

Do I need to register?

No. The tool works without registration.

More about this tool

SHA-256 Hash computes a cryptographic hash from text or strings using Web Crypto API in the browser with UTF-8 encoding.