How secure is SHA-256?

SHA-256 is considered cryptographically unbreakable today. There is no known practical or theoretical collision attack against full-round SHA-256.

Where is SHA-256 most commonly used?

It is standard across SSL/TLS certificates (HTTPS), Bitcoin blockchain mining, DKIM email authentication, and password hashing architectures.

SHA-256 Hash

Try the free SHA-256 Hash tool in the Hash category provided by WebToolBox right in your browser. Process your tasks quickly and securely without any installation.

Input

Output

What is SHA-256 Hash?

SHA-256 is an industry-standard cryptographic hash function belonging to the SHA-2 family, designed by the NSA and standardized by NIST (FIPS 180-4). It maps any input into an extremely secure 256-bit (64-character hexadecimal) hash value.

SHA-256 is the cryptographic backbone of modern digital security. It powers Bitcoin and blockchain proof-of-work, SSL/TLS certificate verification, secure software signing, and HMAC authentication.

With 2^256 possible hash combinations, brute-forcing or discovering a collision in SHA-256 remains computationally impossible with current and foreseeable computing technologies.

How to Use

Input or paste the string you wish to hash into the editor.
The 256-bit hash digest is produced instantly in real time.
Click 'Copy' to copy the 64-character hash value.
Use 'Sample' to quickly test with representative data.

FAQ

How secure is SHA-256?: SHA-256 is considered cryptographically unbreakable today. There is no known practical or theoretical collision attack against full-round SHA-256.
Where is SHA-256 most commonly used?: It is standard across SSL/TLS certificates (HTTPS), Bitcoin blockchain mining, DKIM email authentication, and password hashing architectures.

Hash — Tool Navigation

MD5 Hash

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SHA-384 Hash

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SHA-512 Hash

Try the free SHA-512 Hash tool in the Hash category provided by WebToolBox right in your browser. Process your tasks quickly and securely without any installation.