Hash Generator
Generate SHA-256, SHA-512, and SHA-1 cryptographic hashes instantly in your browser.
Cryptographic hashes are computed 100% locally using Web Crypto API in your browser memory.
Input String
Generated Hashes
SHA-256 (256-bit)
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SHA-512 (512-bit)
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SHA-1 (160-bit)
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How local cryptographic hash generation works
Cryptographic hash functions take an input message string and return a fixed-size byte array (hex digest). SHA-256 and SHA-512 are one-way deterministic functions used for data integrity verification, password security, digital signatures, and blockchain validation.
Common applications
- Data Integrity Verification: Verify checksums of downloaded software installers or ISO disk images against published SHA-256 digests.
- API Signature Authentication: Construct secure HMAC request signatures for API integrations.
- Database Indexing: Create fixed-length unique keys from large text attributes.
Frequently Asked Questions
Is my input text or password uploaded to a server to compute hashes?+
Never. Hashes are computed 100% locally in your browser memory using the native Web Crypto API (crypto.subtle.digest).
Which hash algorithms are generated simultaneously?+
ShadTools computes SHA-256 (256-bit), SHA-512 (512-bit), and SHA-1 (160-bit) hex digests live as you type.
Can I switch between lowercase and uppercase hex output?+
Yes. Click the UPPERCASE / lowercase toggle in the top toolbar to switch text formatting instantly.