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File Kit

File checksum

SHA-256, SHA-1, SHA-384, SHA-512 and CRC-32 of your files, with a box to check them against the published hash.

  1. 1Add your file files
  2. 2Pick options
  3. 3Click Run
  4. 4Download result

Limits

  • MD5 is not offered: it is broken for security, two different files can share an MD5. Ask the publisher for a SHA-256.
  • Files over 100 MB are read in 4 MB slices and hashed with an incremental SHA-256 (the browser has no streaming digest), so even a multi-gigabyte file does not fill memory.
  • SHA-1, SHA-384 and SHA-512 use the browser's hashing and need the whole file in memory, so they are skipped for files over 512 MB. SHA-256 and CRC-32 have no such limit.
  • A matching hash proves the file is identical to the one that was hashed; it does not prove the publisher is trustworthy.

Ask the AI chat

The AI chat can run this tool for you. Try:

  • “what is the sha256 of this file”
  • “checksum these files”
  • “verify this download hash”

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