What is Hash Generator SHA-1?

A SHA-1 hash generator produces a 160-bit (40-character hex) digest of any input. SHA-1 is used in Git commit hashes, legacy certificate fingerprints, and data integrity verification where collision resistance isn't critical.

Type any text or drop a file, and the tool prints the 40-character SHA-1 digest computed on your device by SubtleCrypto. Paste an expected value into the Compare field and the badge turns green or rose so you don't squint at hex. Git still uses SHA-1 to address commits and blobs, so this is a fast way to inspect or verify Git object hashes without spinning up a terminal.

How to use

1. Step 1 — Type or paste text, or drop a file to compute its SHA-1 digest.
2. Step 2 — The hash is generated on your device, and nothing is uploaded.
3. Step 3 — Copy the 40-character hex string or verify it against an expected value.

When to use

• Inspecting or verifying a Git commit/blob hash outside the git CLI.
• Cross-checking an old TLS certificate's fingerprint that's still distributed as SHA-1.
• Matching a checksum on legacy software downloads where MD5 has already been retired but SHA-256 isn't published.

Result

You need to verify a Git object's SHA-1 hash matches what's displayed in your repository log. Paste the object content here and compare the output.

FAQ

Is SHA-1 still safe to use?

Not for any signature or certificate. Google's SHAttered attack in 2017 produced two PDFs with the same SHA-1, and the cost has dropped since then. For Git addressing and legacy compatibility it's still in use, but new systems should pick SHA-256 or stronger.

Why does Git still use SHA-1 if it's broken?

Git uses SHA-1 as a content address, not a security primitive — collisions matter for forging history, not for unique naming. The Git project has been migrating to SHA-256 since 2020, but most repositories on the public web still run SHA-1.

How does SHA-1 differ from SHA-2?

SHA-1 produces a 160-bit digest in one fixed design. SHA-2 is a family — SHA-224, SHA-256, SHA-384, SHA-512 — with longer output and a different internal structure. SHA-2 has no known practical collision attack.

Can I compare two SHA-1 strings here?

Yes — paste the expected hash into the Compare field. The badge turns green on an exact match and rose otherwise. The comparison is case-insensitive, so abc123 and ABC123 are treated as equal.

Does my file get uploaded?

No. The file is read into an ArrayBuffer on your device and passed to SubtleCrypto, all in the page. You can disconnect the network and the hash will still compute correctly.

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