— %
Hashing…
How to use
- 1 Pick Text or File mode.
- 2 Type / paste text, or choose a file (≤ 50 MB).
- 3 Pick output encoding (hex or Base64).
- 4 Copy the digest.
Why use this tool
- Uses native Web Crypto API.
- Common in legacy systems — Git object IDs, older TLS, some integrity checks.
- Output in hex (40 chars) or Base64 (28 chars).
- Pure client-side.
Frequently asked questions
Is SHA-1 still safe?
No — SHA-1 has practical collision attacks (SHAttered, 2017). Do not use SHA-1 for digital signatures or any anti-tamper purpose. Use SHA-256 instead.
Why is SHA-1 still around?
Legacy compatibility — Git uses it for object IDs (with collision-detection patches), some older TLS deployments, and historical file checksums.
Does this work offline?
Yes — hashing runs entirely in your browser once the page loads.
SHA-1 Hash Generator is a free developer utility by Zerethon Tools. Compute SHA-1 digest of text or files in your browser using Web Crypto API. Useful for Git commit hashes and legacy systems. Runs entirely in the browser — no signup, no upload.
- Category
- Developer
- Pricing
- Free
- Privacy
- Browser-based
- Signup
- Not required
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