EazyTools4u

SHA-1 Hash Generator

Free online SHA-1 hash generator. Compute SHA-1 digests for text and files in your browser. Private, instant, and accurate with UTF-8 and binary file support.

Text mode — hashes your input as UTF-8 characters

Best for strings, passwords, JSON, and code. Need to verify a download against a published checksum? Switch to and drop the file in — text mode cannot reproduce a file checksum.

0 bytes (UTF-8)
Legacy160-bitweak

Enter text above to generate SHA-1 hash

Text encoded as UTF-8 · All processing is local

Related Hash Generators

MD5SHA-256RIPEMD-160SHA-512SHA3-256Keccak-256SHA-384BLAKE2b-256

Need all algorithms at once? Open the full Hash Generator for every supported algorithm.

What is SHA-1?

SHA-1 (Secure Hash Algorithm 1) is part of the SHA family published by NIST. It produces a 160-bit (40 hex character) digest. SHA-1 was widely used in Git commit IDs, TLS certificates, and digital signatures for years. Google demonstrated a practical SHA-1 collision in 2017 (SHAttered), so it is no longer considered secure for signatures — but it remains common in legacy systems and version control.

Common use cases:

  • Computing Git-style object hashes for debugging
  • Legacy API integrations that still require SHA-1
  • Verifying old download checksums published as SHA-1
  • Comparing digests in historical security audits

Examples

InputSHA-1 Hash
Eazytools4u84aa1306f1e9000bf09953d3b2f4bae8f3997df8
abca9993e364706816aba3e25717850c26c9cd0d89d
helloaaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d

Programming Examples

Node.js
const crypto = require("crypto");

const hash = crypto.createHash("sha1")
  .update("hello", "utf8")
  .digest("hex");

console.log(hash); // SHA-1 hex digest
Python
import hashlib

digest = hashlib.sha1(b"hello").hexdigest()
print(digest)  # SHA-1 hex digest
OpenSSL CLI
echo -n "hello" | openssl dgst -sha1 -hex

Frequently Asked Questions

Is SHA-1 still secure?

No, not for digital signatures or certificate authorities. Practical collision attacks exist. It is acceptable for non-adversarial checksums in legacy contexts, but SHA-256 is recommended for new projects.

Why does Git still use SHA-1?

Git historically used SHA-1 for object IDs. Git has added collision detection and is migrating toward SHA-256. For new security-sensitive hashing, use SHA-256 or SHA-3 instead.

Text vs File mode — which should I use?

Use Text mode for strings (UTF-8 encoded). Use File mode to hash raw binary file bytes for download verification. They produce different digests for the same visible content.

Is computation done on a server?

No. SHA-1 is computed entirely in your browser using the audited @noble/hashes library.

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