Cryptographic Hash Generator

Compute secure cryptographic message digests client-side using native window.crypto.subtle and pure JS MD5 with legacy safety indicators.

100% Local Cryptography: Text hashing runs entirely in your browser via Web Crypto and native JavaScript. No text is ever uploaded.

Input Text to Hash

26 characters (26 bytes)

Algorithm:

SHA-256 Output

Cryptographically Secure

Enter text above to compute hash...

All Hashes Simultaneously

SHA-256:—

SHA-384:—

SHA-512:—

SHA-1:—

MD5:—

How It Works

Encodes input string to UTF-8 bytes and calculates SHA-256, SHA-384, SHA-512, and SHA-1 via native Web Crypto API.
Computes RFC 1321 MD5 digests locally using pure JavaScript without server transmission.
Flags MD5 and SHA-1 as legacy algorithms unsuitable for security-sensitive cryptographic applications.

Formula & Technical Standard

Digest = Hex(SubtleCrypto.digest("SHA-256", UTF8Bytes(text)))

Practical Example

SHA-256 of "techtools"

Input: techtools

Output: b337856b3e64816c4fa103ef88d447d2f95c4793f0b48da143c7b77ce4ff5f04

Deterministic 256-bit hash.

Frequently Asked Questions

Can a SHA hash be reversed?

No. Cryptographic hashes are strictly one-way mathematical functions.

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