What is a cryptographic hash?

A cryptographic hash function converts any input data into a fixed-length string (the hash). The same input always produces the same hash, but it is practically impossible to reverse the hash back to the input — making hashes useful for password storage and file integrity checks.

What is SHA-256 used for?

SHA-256 is used in Bitcoin mining, SSL/TLS certificates, code signing, and password hashing (often combined with a salt). It produces a 256-bit (64 hex character) output.

MD5 is no longer considered cryptographically secure for security-sensitive uses like password storage because it is vulnerable to collision attacks. However, it is still useful for non-security purposes like file checksums and data deduplication.

Yes. Switch to File mode, select any file, and the tool calculates its hash locally in your browser. This is useful for verifying a downloaded file has not been tampered with.

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Cryptographic Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes online for free. Hash text or files instantly in your browser. Privacy-first.

Input Text

UPPERCASE output

ℹ️ About Hashing

Cryptographic hash functions are one-way — you cannot reverse a hash back to the original text. SHA-256 and SHA-512 are used in security-critical applications. SHA-1 is considered weak and should not be used for security purposes. All hashing happens locally in your browser using the Web Crypto API.

About This Tool

Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes from any text or file, instantly in your browser. Useful for verifying file integrity, generating checksums, understanding password hashing, and working with digital signatures.