Hash Generator

Generate cryptographic hashes using MD5, SHA-1, SHA-256, SHA-512, and SHA-3. Supports text and file inputs. All hashing runs client-side for complete privacy.

InputUpload fileBrowse

MD5128-bitBroken — do not use for security

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SHA-1160-bitDeprecated — avoid for new systems

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SHA-256256-bitRecommended for most use cases

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SHA-384384-bitHigher security margin

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SHA-512512-bitMaximum length SHA-2

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Frequently Asked Questions

Which hash algorithm should I use?

Use SHA-256 for most security-sensitive use cases (file integrity, HMAC, digital signatures). SHA-512 provides extra margin. Avoid MD5 and SHA-1 for security — they're cryptographically broken and vulnerable to collision attacks. MD5 is only acceptable for checksums or non-security purposes.

What is a hash used for?

Hashes verify file integrity (check if a download was corrupted/tampered), store passwords safely (using bcrypt/Argon2 which are hashes with salt), create message authentication codes (HMAC), and in digital signatures. One-way: you can't reverse a hash back to the original.

Is this tool safe to use with sensitive data?

All hashing is done in your browser using the Web Crypto API — no data is sent to any server. However, avoid hashing actual passwords here; use a proper password hashing function (bcrypt, Argon2) server-side instead.