🔒 Hash Compare
Compute and compare MD5, SHA-1, and SHA-256 hashes of two text strings. Use it to verify whether two pieces of text are identical, to spot-check file contents, or to confirm a download has not been tampered with. All computation runs in your browser via the Web Crypto API — nothing is sent to a server.
🔒 Compare Two Hashes
Enter two text values below, pick an algorithm, then click Compute & compare:
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❓ Frequently Asked Questions
No. Hashing is done entirely in your browser using the built-in Web Crypto API (for SHA-1 and SHA-256) and a small pure-JavaScript MD5 implementation. Your text never leaves your device, which is why the tool is safe to use for sensitive material like passwords or private data.
For modern security-sensitive applications, SHA-256 is the right choice — it's the modern cryptographic standard and has no known practical collision attacks. SHA-1 is deprecated for security but still used for legacy file integrity checks. MD5 should only be used for non-security purposes like deduplicating files or generating cache keys; it is cryptographically broken.
A hash function is deterministic: identical input always produces identical output, but the output is designed to be irreversible (you can't recover the input from the hash) and collision-resistant (it's extremely hard to find two different inputs that hash to the same value). That's why hashes are perfect for verifying data integrity.
This tool only does plain text hashing, which is suitable for file integrity checks. For password storage, you should use a dedicated password-hashing algorithm like bcrypt, scrypt, or Argon2 — those intentionally add computational cost to resist brute-force attacks. Plain SHA-256 of a password is too fast to be safe against modern hardware.