Password Generator
Generate cryptographically secure random passwords using crypto.getRandomValues() with length slider, character set toggles, and entropy strength meter.
SHA-256 Hash Generator
SubtleCryptoCompute cryptographic SHA-256 hex and Base64 digests locally using the browser's Web Crypto API (crypto.subtle.digest) with hash verification.
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How to Use SHA-256 Hash Generator
- 1Type or paste the text string you want to hash into the input field.
- 2The 64-character hexadecimal (and 44-character Base64) SHA-256 digest is computed automatically.
- 3Optionally paste an expected SHA-256 hash into the 'Verify / Compare Hash' field to check for an exact match.
- 4Click 'Copy Hash' or 'Download Result' to save the digest.
Key Features & Privacy
- ✦Uses native `window.crypto.subtle.digest('SHA-256', data)` with a pure-JS FIPS 180-4 SHA-256 fallback for non-HTTPS file contexts.
- ✦Outputs lowercase hex, UPPERCASE hex, and Base64 digest representations.
- ✦Includes an interactive hash comparison checker for verifying integrity checksums.
- ✦Clearly explains that SHA-256 is a one-way cryptographic hash function, not reversible encryption.
Frequently Asked Questions
Can a SHA-256 hash be decrypted back into the original text?
No. SHA-256 is a one-way cryptographic hash function, not encryption. It maps arbitrary-length input into a fixed 256-bit (64-hex-character) fingerprint that cannot be reversed mathematically.
Why does changing a single letter completely change the SHA-256 output?
This is known as the avalanche effect: flipping even a single bit in the input alters roughly half of the output bits unpredictably.
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