Which SHA algorithm should I use?

Use SHA-256 for almost everything — it's secure, fast and widely supported. Use SHA-512 for extra margin on 64-bit systems. Avoid SHA-1 for security purposes, as it is no longer collision-resistant; it remains useful only for non-security checksums.

Can a SHA hash be reversed?

No. SHA functions are one-way, so you cannot recover the original text from a hash. To verify a value, hash it again and compare the results.

Is hashing done on a server?

No. Hashing uses the Web Crypto API built into your browser, so everything happens locally and your input never leaves your device.

Why does the same text always give the same hash?

Hash functions are deterministic — identical input always yields identical output. That's exactly what makes them useful for integrity checks and fingerprinting.

SHA Hash Generator

Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes from any text, computed securely in your browser.

Algorithm

Input

SHA-256 Hash

What Is the SHA Hash Generator?

The SHA Hash Generator computes secure SHA-1, SHA-256, SHA-384 and SHA-512 message digests from any text. It uses your browser's native Web Crypto API, so hashing is fast, standards-compliant and fully local — nothing you type is uploaded. SHA-256 and above are the modern, recommended choice for checksums, integrity verification and fingerprinting data.

How It Works

Choose an algorithm, then type or paste your text. The hexadecimal hash updates instantly as you type. Copy or download the result with one click. The same input always produces the same hash, which is what makes hashes useful for verifying that data hasn't changed.

When to Use It

Use SHA hashes to verify file or message integrity, create deterministic fingerprints or cache keys, compare values without storing the original, or check a downloaded file's checksum against a published one. Prefer SHA-256 or SHA-512 over MD5 and SHA-1, which are no longer considered collision-resistant.

Frequently Asked Questions

Which SHA algorithm should I use?: Use SHA-256 for almost everything — it's secure, fast and widely supported. Use SHA-512 for extra margin on 64-bit systems. Avoid SHA-1 for security purposes, as it is no longer collision-resistant; it remains useful only for non-security checksums.
Can a SHA hash be reversed?: No. SHA functions are one-way, so you cannot recover the original text from a hash. To verify a value, hash it again and compare the results.
Is hashing done on a server?: No. Hashing uses the Web Crypto API built into your browser, so everything happens locally and your input never leaves your device.
Why does the same text always give the same hash?: Hash functions are deterministic — identical input always yields identical output. That's exactly what makes them useful for integrity checks and fingerprinting.

Last reviewed: 2026-06-27

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