SHA-1 is a hash function producing a 160-bit digest. It is deprecated for new security designs.

Is SHA-1 secure today?

No for collision resistance. Use SHA-256 for new projects.

SHA-1 Generator

Compute SHA-1 hashes locally for legacy checksums and compatibility testing. Input stays in your browser.

Free
No signup
Private

Text to hash SHA-1 (hex)

Your generated secrets and hashes are processed locally in your browser whenever possible and are not stored on our servers.

Overview

Compute SHA-1 hashes locally for legacy checksums and compatibility testing. Input stays in your browser.

Benefits

Web Crypto SHA-1
Hex output
No server upload
Instant hashing

Use Cases

Legacy system checksums
Git-style object IDs (education)
Compatibility verification
Learning hash functions

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How to Use

Enter text.
Click Generate Hash.
Copy SHA-1 hex digest.

FAQ

What is SHA-1?: SHA-1 is a hash function producing a 160-bit digest. It is deprecated for new security designs.
Is SHA-1 secure today?: No for collision resistance. Use SHA-256 for new projects.
Is my text stored?: No. Hashing is local.

About SHA-1 Generator

While SHA-1 is outdated for security-critical use, developers still encounter SHA-1 in older systems. This calculator helps you verify digests without installing OpenSSL.