Text Hash Generator

Introduction:

Cryptographic hash functions compress any length of digital text into a fixed-size alphanumeric digest that appears random yet is deterministic and collision-resistant within practical limits. Because even the tiniest change in the original message produces an entirely different digest, hashes serve as tamper-evident fingerprints for verifying data integrity and authenticating records across networks and storage devices.

Using your browser’s reactive engine, this tool lets you enter or paste text, attach an optional salt as a prefix or suffix, and choose among MD5, SHA-1, the SHA-2 and SHA-3 families, or RIPEMD-160. The selected algorithm processes the exact input locally and instantly displays the resulting digest in either uppercase or lowercase for effortless copying or sharing.

After downloading a firmware image, for example, you can hash the vendor’s checksum string and your local file to confirm they match before installation, avoiding corrupted updates. Avoid using unsalted fast hashes for password storage because specialised hardware can brute-force trivial digests quickly, leading to serious credential leaks and breaches.

Technical Details:

Cryptographic hashes apply a one-way mathematical transformation that slices the input into fixed-width blocks, passes them through nonlinear mixing functions, and condenses the evolving internal state into a constant-length digest such as 128, 160, 224, 256, 384, or 512 bits. Because the transformation is irreversible and avalanche-prone, a brute-force search is the only feasible approach to discover a pre-image or collision within astronomical timeframes. Consequently, hashes support integrity checks, digital signatures, password verification, and block-chain linking.

1. Normalise the input text to bytes and, if supplied, concatenate the salt as selected prefix or suffix.
2. Partition the message into fixed-size blocks and append padding plus length encoding as required by the chosen algorithm.
3. Iteratively mix each block with the working state using nonlinear rounds, permutations, and modular arithmetic.
4. Output the final state as a hexadecimal digest and, if enabled, convert it to uppercase for readability.

The longer the digest, the lower the collision probability and the higher the computational cost for exhaustive attacks.

• input – text to be hashed.
• salt – optional random string increasing entropy.
• salt_position – prefix or suffix placement.
• hash_type – algorithm selected from the table above.
• uppercase – toggles hexadecimal case.

• Fast hashes are unsuitable for password storage.
• Zero-length inputs still produce a digest.
• Adding salt prevents pre-computed rainbow-table attacks.
• Digest collisions are theoretically possible but computationally prohibitive for modern algorithms.

• Extremely large inputs may exhaust browser memory.
• Non-UTF-8 characters are treated as raw bytes.
• Identical salt and input order is mandatory for verification.
• Copying the digest in mixed-case environments may fail case-sensitive comparisons.

Based on FIPS 180-4 (SHA-2), FIPS 202 (SHA-3), RFC 1321 (MD5), and ISO/IEC 10118-3 (RIPEMD-160) guidelines.

The hashing process is entirely client-side and never transmits data beyond your browser session.

Step-by-Step Guide:

Follow these steps to create a digest and verify integrity.

1. Paste or type your text into the main Text field.
2. Select the desired Hash type from the list.
3. (Optional) Open Advanced, enter a salt, and set its position.
4. Toggle Uppercase if you need capital letters.
5. Copy the digest and compare it with the reference value.

FAQ:

Glossary:

Digest

Fixed-length output string of a hash.

Salt

Random data concatenated to input to add uniqueness.

Collision

Different inputs producing identical digests.

Pre-image

Original message that yields a known digest.

Avalanche effect

Property where small input change flips many output bits.