Compute DJB2, SDBM, and FNV-1a hashes

Compute a digest of text after choosing its encoding and display format.

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ToolString Hash
Input
Output
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Preview

How it works

The selected digest algorithm processes the UTF-8 bytes of the string and renders the resulting fixed-length bytes in the chosen encoding. A digest is deterministic for identical bytes but is not reversible text encryption.

  • UTF-8 is the web default; hex is readable while Base64 is more compact.

Worked example

Hash a String
Compute DJB2, SDBM, and FNV-1a hashes for a string
Input
											hello
Output
												DJB2:   f923099 (261238937)
SDBM:   28d19932 (684824882)
FNV-1a: 4f9f2cab (1335831723)

When to use this

Content fingerprints, cache keys, and reference-vector tests hash strings.

Edge cases

  • Unicode normalization changes the bytes before hashing.
  • A trailing newline creates a different digest.
  • A digest cannot be decoded back into the original string.

References