What is the SHA-256 hash of "a"?

Q: What is the SHA-256 hash of "a"?

The SHA-256 hash of "a" is "ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb".

SHA-256 Hash of "a"

SHA-256

ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb

The SHA-256 hash of "a" is: ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb

All hash values

SHA-256Recommendedca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb

SHA-186f7e437faa5a7fce15d1ddcb9eaeaea377667b8

SHA-38454a59b9f22b0b80880d8427e548b7c23abd873486e1f035dce9cd697e85175033caa88e6d57bc35efae0b5afd3145f31

SHA-5121f40fc92da241694750979ee6cf582f2d5d7d28e18335de05abc54d0560e0f5302860c652bf08d560252aa5e74210546f369fbbbce8c12cfc7957b2652fe9a75

⚠️ Do not use SHA-1 for security

SHA-1 is considered cryptographically broken. Use SHA-256 or higher for all security-sensitive applications.

How SHA-256 works

SHA-256 is a cryptographic hash function that produces a fixed 256-bit (64-character hex) output. Even a tiny change in the input produces a completely different hash. It is one-way — you cannot reverse a hash to get the original input.

Common uses for hash functions

Password hashing and storage
File integrity verification
Digital signatures and certificates
Blockchain and cryptocurrency
Data deduplication

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More hash examples

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