SHA-1 Hash Generator

Type or paste text to see its SHA-1 hash.

Free · Runs in your browser · Your text is never uploaded

Text fed into a hash function to produce a fixed-length fingerprint code

About SHA-1

SHA-1 produces a 160-bit (40 hex character) hash. Practical collision attacks were demonstrated in 2017, and browsers and certificate authorities no longer accept it for security. It survives in legacy systems and in Git, which uses it to identify objects.

The hash is computed from your text exactly as typed (encoded as UTF-8), including spaces and line breaks. A single extra space gives a completely different result, which is the usual reason hashes “don’t match” between tools. Turn on “Hash each line separately” to process a list.

Need more options? Open the full Hash Generator.

Frequently asked questions

Is SHA-1 still used?

Yes, in Git object IDs and old systems, but it is deprecated for digital signatures and certificates.

Can I reverse an SHA-1 hash?

No. Hash functions are one-way. Short or common inputs can be found by guessing, which is why passwords should use dedicated slow hashes such as bcrypt or Argon2.

Is my text sent to a server?

No. The hash is calculated in your browser.

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