Free Hash Generator - MD5 SHA-256 SHA-512 Calculator

Free online hash generator. Calculate MD5, SHA-1, SHA-256, SHA-512 hashes. Generate HMAC signatures. Hash text or files. Verify checksums. All processing client-side.

Enter Text

Algorithm

MD5128-bit

SHA-1160-bit

SHA-256256-bit

SHA-512512-bit

Output Format

Tips

• SHA-256 is recommended for most security applications
• Use HMAC when you need to authenticate messages with a secret key
• All processing is done locally - your data never leaves your browser

About This Tool

Generate cryptographic hashes using MD5, SHA-1, SHA-256, and SHA-512 algorithms. Hash text strings or files, create HMAC signatures with secret keys, and verify checksums. All processing happens in your browser - your data never leaves your device.

Frequently Asked Questions

What hash algorithms are supported?

We support MD5, SHA-1, SHA-256, and SHA-512. SHA-256 is recommended for most use cases as it provides strong security without excessive length.

Is MD5 still secure?

MD5 is cryptographically broken and should not be used for security purposes. It's still useful for checksums and non-security applications like cache keys.

What is HMAC?

HMAC (Hash-based Message Authentication Code) combines a hash function with a secret key. It verifies both data integrity and authenticity.

Is my data secure?

Yes! All hashing is done in your browser using the Web Crypto API. Your text, files, and secret keys are never sent to any server.

Can I hash large files?

Yes, you can hash files of any size. The tool processes files in chunks to avoid memory issues.

What output formats are available?

Choose between lowercase hex, uppercase hex, or Base64 encoding for your hash output.

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