SHA-1 Hash Generator
Paste text to generate a SHA-1 digest locally. SHA-1 is broken for collision resistance—use SHA-256 for new work.
Enjoying this tool?
Part of Code & data tools
About SHA-1 Hash Generator
SHA-1 produces a 160-bit digest (40 hex characters). It still appears in older APIs and Git object names, but collision attacks make it a poor choice for new security or integrity designs.
How to Use SHA-1 Hash Generator
Paste the string that a legacy system hashes with SHA-1. Copy the digest to compare with the remote checksum. Plan a migration to SHA-256 when you control the protocol.
When to Use SHA-1 Hash Generator
Legacy APIs: Reproduce SHA-1 signatures the other side still expects. Git education: Show how object ids look as hex. Migration: Confirm old checksums before switching algorithms.
Why Use This SHA-1 Hash Generator?
A browser SHA-1 helper is faster than installing extra CLI tools for a one-line digest.
How to use
1. Paste the string that a legacy system hashes with SHA-1.
2. Copy the digest to compare with the remote checksum.
3. Plan a migration to SHA-256 when you control the protocol.
Frequently asked questions
Is SHA-1 still safe?
Not for collision-resistant integrity or signatures. Use SHA-256 for new work.
Does this verify Git commits?
No. It hashes pasted text. Git object hashing includes type headers this page does not add.