MD5 Hash Generator

Computes the MD5 hash of any text you type, live as you type it. The input is UTF-8 encoded before hashing, so non-ASCII characters (emoji, CJK) hash to the same value as they would in any standards-compliant MD5 implementation. Output is a 32-character lowercase hexadecimal digest, with a toggle to switch it to uppercase.

1. Type or paste text into the input area; the hash updates immediately. 2. The result panel shows the 32-hex-character digest. 3. Use Copy to copy the digest, the lowercase/uppercase toggle to switch case, or Clear to reset both fields. The hash panel itself also has a copy button.

The implementation operates on the UTF-8 byte sequence using a four-word (A, B, C, D) state initialized to 1732584193, -271733879, -1732584194, 271733878. It runs four rounds of 16 operations each (F, G, H, I round functions) over 512-bit blocks with per-step constants and shifts, pads the final block with a 0x80 byte and the 64-bit little-endian length, and outputs the final state as lowercase hex. Output length is always 128 bits = 32 hex chars.