SHA-256 / MD5 Hash Generator

What is a Hash?

A hash is a one-way function that converts input data of any size into a fixed-length string of characters (typically hexadecimal). The same input always produces the same hash, but you cannot reverse a hash to recover the original input. Hashes are used for data integrity verification, checksums, digital signatures, and in some cases for storing passwords (though MD5 should never be used for passwords).

SHA-256 vs MD5: When to Use Each

SHA-256: Part of the SHA-2 family, SHA-256 produces a 256-bit (64 hex character) hash. It is cryptographically secure and recommended for security-sensitive applications: password hashing (with proper salting), digital signatures, certificate verification, and data integrity checks. SHA-256 is the industry standard for secure hashing.

SHA-384 and SHA-512: Longer variants of SHA-2. SHA-384 produces 96 hex characters; SHA-512 produces 128. Use them when you need stronger security or compatibility with systems that require these specific algorithms.

MD5: Produces a 128-bit (32 hex character) hash. MD5 is fast but cryptographically broken—collisions can be found. Use MD5 only for non-security purposes: checksums for file integrity (where collision attacks are not a concern), legacy system compatibility, or internal identifiers. Never use MD5 for passwords or security-sensitive data.

How to Use the Hash Generator

Enter your text in the input area, select an algorithm (SHA-256, SHA-384, SHA-512, or MD5), and click "Generate Hash". The hash appears in the output area in hexadecimal format. Use the copy button to copy the result. All processing happens locally in your browser—no data is sent to any server.

Examples

Example 1: SHA-256 of "Hello World"

Input: Hello World

SHA-256: a591a6d40bf420404a011733cfb7b190d62c65bf0bcda32b57b277d9ad9f146e

Example 2: MD5 of "password"

Input: password

MD5: 5f4dcc3b5aa765d61d8327deb882cf99

Note: Do not use MD5 for storing real passwords. This example is for illustration only.

Example 3: SHA-512 of a longer text

Input: The quick brown fox jumps over the lazy dog

SHA-512 produces a 128-character hexadecimal hash. SHA-512 is useful when you need a longer hash for compatibility or extra security margin.

Frequently Asked Questions

Is my data sent to a server?

No. All hashing happens locally in your browser using the Web Crypto API (for SHA algorithms) and a lightweight MD5 library. Your text never leaves your device.

Can I use MD5 for passwords?

No. MD5 is cryptographically broken and vulnerable to collision attacks. For password hashing, use SHA-256 or better with proper salting, or a dedicated password hashing algorithm like bcrypt or Argon2.

What is the difference between SHA-256 and MD5?

SHA-256 is secure and produces a 64-character hex hash. MD5 is faster but broken—it produces a 32-character hex hash. Use SHA-256 for security; use MD5 only for non-security checksums or legacy compatibility.

Does the tool support file hashing?

This version supports text input only. File hashing may be added in a future update.

What encoding is used for the input?

The input is encoded as UTF-8 before hashing. This ensures correct handling of Unicode characters, accented letters, and emojis.

Security Disclaimer

MD5 is not suitable for passwords or security-sensitive applications. Use SHA-256 or stronger algorithms for any security-related use case. This tool is for development, testing, and non-security checksums only.