SHA-1 calculator
Compute SHA-1 for a text input locally in your browser (hex + Base64). Copy results or share a link. Includes a security warning. Browser-only MVP.
Tool details
Work#sha1#sha-1#hash#checksum#digest#crypto
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How it works
- Open the tool and enter your inputs.
- Copy or share the result (share link encodes state in the URL).
- Adjust until everyone agrees on the rule.
Why this exists
- Wikipedia: SHA-1
- RFC 3174: US Secure Hash Algorithm 1 (SHA1)
- SHAttered: first practical SHA-1 collision
Links show the real-world friction. The tool itself does not upload your data.
Related tools
FAQ
Does this tool upload my data?
No by default. Most tools run locally in your browser. See the Privacy page for details.
What does “Share link” do?
It encodes your inputs into the URL hash so you can share without a server.
Is the result “official” or legally/financially accurate?
It’s a calculator, not advice. For critical cases, verify with official sources.