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Hashing & Checksums

MD5 Digest Calculator

Calculate or verify a digest with MD5. Enter the data, choose the digest options, then copy the calculated value.

Tool workspace

Your input stays in this browser.

Add the required input to continue.

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You can run the tool again after any change.

Your result appears here

Calculate or verify a digest with MD5. Enter the data, choose the digest options, then copy the calculated value.

This tool runs open-source code from CyberChef by GCHQ (Apache License 2.0). See open-source credits.

MD5 Digest Calculator uses MD5 for the supplied input. The operation returns a deterministic digest for the supplied input and selected settings. The digest or checksum format is specific to MD5 Digest Calculator.

The operation returns a deterministic digest for the supplied input and selected settings. The digest or checksum format is specific to MD5 Digest Calculator. This result runs in the browser for this catalog category. Processing runs in the browser.

This legacy digest supports compatibility checks; it does not provide a safe modern security boundary.

Instructions

  1. Provide text or data for this tool.
  2. Use a short public fixture. This applies to MD5 Digest Calculator.
  3. Record every size, round, variant, or seed setting beside the digest. This applies to MD5 Digest Calculator.
  4. Change one input byte to verify that the result changes as expected. This applies to MD5 Digest Calculator.

Example

Input: Short public bytes "Test message". Algorithm operation: MD5 Digest Calculator.

Settings: MD5 Digest Calculator: Use the operation's documented input encoding. Select digest size, rounds, variant, seed, or output encoding when shown. Keep byte order and formatting unchanged when comparing outputs.

Result: The operation returns a deterministic digest for the supplied input and selected settings. The digest or checksum format is specific to MD5 Digest Calculator.

Limits

  • MD5 Digest Calculator: This algorithm has known security weaknesses and should not protect new secrets.
  • MD5 Digest Calculator: Digest equality depends on exact bytes, encoding, and settings.
  • MD5 Digest Calculator: A digest alone does not authenticate its source.