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Hash Generator (MD5, SHA-256, SHA-512)

Compute secure cryptographic checksums and hashes for text strings using standard cryptographic algorithms right in your browser.

Input String to Hash
MD5 (128-bit)
8580ae3c8049140e539dbc9eae1fb42c
SHA-1 (160-bit)
346ae00a8d13ad8952bbd69691c5e6dcf03b4c9b
SHA-256 (256-bit)
7e0cdb2c34131f36b3ee26da4d7f854de690120eb16f0c255102bc9ca5e208cb
SHA-512 (512-bit)
afaef8df994e43589cc949ecd9aa528a67ccda37a963accf34791655964b18a89c9216eca1612a25fb84066f64a93e4e6baa1dbbc2316957c50f8fddcb719eaf

A cryptographic hash reduces any input to a fixed-length fingerprint. The same input always produces the same hash, and any change — even a single bit — produces a completely different one. Hashes are used to verify file integrity, deduplicate content, and index data. This generator produces MD5, SHA-1, SHA-256, and SHA-512 digests in your browser, so the input is never transmitted.

How to generate a hash

  1. Enter or paste the text you want to hash.
  2. Choose the algorithm. SHA-256 is the sensible default for anything security-related.
  3. Read the resulting hexadecimal digest and copy it.
  4. To verify a download, compare your computed hash against the one published by the source — they must match exactly, character for character.

The Hash Generator (MD5, SHA-256, SHA-512) runs entirely in your browser — nothing you enter is uploaded, stored, or logged.

When to use this tool

Verifying a downloaded file

Projects publish a SHA-256 checksum alongside their releases. Computing the hash of what you downloaded and comparing confirms the file arrived intact and was not tampered with.

Detecting whether content changed

Comparing hashes of two versions is far faster than comparing the content itself, and works regardless of size.

Deduplicating records

Hashing a normalised representation of a record gives a compact key for identifying exact duplicates across a large dataset.

Things worth knowing

  • Hashing is one-way by design. There is no operation that recovers the input from the digest.
  • MD5 and SHA-1 are both cryptographically broken — collisions can be constructed deliberately. Use them only for non-security checks like cache keys, never for signatures or integrity guarantees.
  • Hashes are case-insensitive in hex representation but compare them exactly; a single differing character means a different input.
  • Never hash passwords with a plain hash function. Password storage requires a slow, salted algorithm such as bcrypt, scrypt, or Argon2.

Frequently Asked Questions

Can a hash be decrypted?

No, cryptographic hash functions are one-way functions.

Can a hash be reversed or decrypted?

No. Hashing is a one-way function — the digest is a fixed size regardless of input length, so information is necessarily discarded. What sites advertising 'hash decryption' actually do is look the digest up in a precomputed table of common inputs. That works for 'password123'; it does not work for arbitrary data.

Which hash algorithm should I use?

SHA-256 for essentially all new work — it is fast, widely supported, and has no known practical weakness. SHA-512 is a reasonable choice on 64-bit systems. Avoid MD5 and SHA-1 for anything security-relevant: practical collision attacks exist for both, meaning an attacker can construct two different files with the same digest.

Why is MD5 still available if it is broken?

Because collision resistance is not always what you need. MD5 remains perfectly serviceable as a fast checksum for cache keys, deduplication, or detecting accidental corruption — situations with no adversary. It is unsuitable wherever someone might deliberately engineer a collision.

Should I use this to hash passwords?

No. Fast hashes are the wrong tool for password storage precisely because they are fast, which lets an attacker test billions of guesses per second against a leaked database. Use a deliberately slow, salted algorithm — bcrypt, scrypt, or Argon2 — which is designed to make that expensive.

Is my input sent anywhere?

No. Hashing runs in your browser using the Web Crypto API, and the input never leaves your device.

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