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SHA-1 hash generator

Generate an SHA-1 hash of any text or file instantly in your browser. Free SHA-1 checksum calculator — nothing is uploaded.

🔒 Runs 100% in your browser — safe for real data

How to use the sHA-1 hash generator

  1. Type or paste your text, or drop a file.
  2. Read the SHA-1 hash at the top of the list.
  3. Copy it.

About this tool

SHA-1 produces a 160-bit (40 hex character) hash. Git historically used it for commit IDs; it is deprecated for security since practical collisions were demonstrated in 2017.

FAQ

Is my data sent to a server?

No. DevKnife tools run entirely in your browser with JavaScript. Nothing you paste — API keys, tokens, customer data — is transmitted or logged, so it is safe for production data.

How long is an SHA-1 hash?

40 hexadecimal characters (160 bits).

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