Hash Tool — SHA-1/256/384/512

Compute SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text. Fully local via the browser's WebCrypto. No data leaves your device.

When you need to quickly hash a string — verify a checksum, generate an integrity fingerprint, derive a cache key — open the popup, paste, pick an algorithm, and read the hex. Hashing is done by the browser's native WebCrypto, the same primitive that backs HTTPS. Key features: - Four algorithms in one popup: SHA-1, SHA-256, SHA-384, SHA-512 - Live computation — the hex digest updates as you type - Character count for the input and hex-length count for the output, shown live - One-click copy on the full hex digest - Your last-used algorithm and UI language are remembered locally - Backed by `crypto.subtle.digest` — no third-party hashing library, no network No data leaves your device. The hash is computed on your machine; nothing is uploaded or logged.