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SHA Hash Generator — SHA-1, 256, 384 & 512

Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text instantly, using the browser's native Web Crypto API. Your input never leaves this page.

Hashes are computed with the browser's native Web Crypto API — your input never leaves this page.

What is a SHA hash?

SHA (Secure Hash Algorithm) turns any input into a fixed-length, irreversible digest — a hexadecimal string that looks like a random fingerprint of the data. SHA-256 always produces 64 hex characters (256 bits), SHA-512 produces 128, and so on, no matter whether the input is one letter or a whole file.

Hashing is a one-way street: you cannot reconstruct the original from the digest. Change a single character in the input and the entire hash changes unpredictably, which makes hashes ideal for verifying integrity.

SHA-1 vs SHA-256 vs SHA-512

  • SHA-256 — the modern default. Used by TLS certificates, most APIs, and password derivation stacks. Safe to reach for whenever you need a checksum.
  • SHA-384 / SHA-512 — stronger variants from the SHA-2 family, useful when you need longer digests or extra security margin.
  • SHA-1 — historically everywhere (Git, older signatures), but its collision resistance is broken and browsers and security standards have deprecated it. Only use SHA-1 for legacy compatibility checks, never for security.

In 2026, SHA-256 remains the balanced choice for virtually all integrity and signature work.

What hashes are used for

  • Password storage — systems store a hash of your password, not the password itself. (For your own accounts, always let the password manager or framework use a slow KDF like bcrypt or Argon2, not plain SHA.)
  • File integrity — compare the SHA-256 of a download against the checksum published by the vendor.
  • API signatures — HMAC-style signing and Base64 wrapping of digests.
  • Deduplication — using the hash as a stable key for identical content.

Need a fresh API key or ID? Pair hashing with our UUID generator for a v4 identifier.

The Web Crypto API and you

This tool computes digests with the browser's native crypto.subtle.digest — the same implementation browsers use for TLS. Your text is converted to bytes and hashed locally, so nothing leaves this page and nothing can be intercepted. If you open the tool over plain HTTP, browsers disable crypto.subtle, so load this page over HTTPS or localhost.

Frequently Asked

SHA Hash Generator FAQ

Common questions about SHA hashes, answered by our security experts.

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