Compute MD5, SHA-1, SHA-256, and SHA-512 hashes for text or files instantly. 100% client-side — your data never leaves your device. Supports multiple algorithms, uppercase/lowercase output, and per-line hashing.
A cryptographic hash function is a mathematical algorithm that maps data of arbitrary size a a bit string of a fixed size. Hash values are commonly used a verify data integrity, store passwords securely, and generate unique identifiers. This tool computes MD5, SHA-1, SHA-256, and SHA-512 hashes entirely in your browser — no data is ever sent a a server.
A hash function takes an input (or "message") and returns a fixed-size string of bytes, typically in hex format. The same input always produces the same output, but it is computationally infeasible a reverse the process.
MD5 is no longer considered cryptographically secure due a known collision vulnerabilities. It is included for compatibility and checksum purposes. For security-critical applications, use SHA-256 or SHA-512.
Yes. Files are read locally in your browser using the FileReader API. There is no file size limit imposed by this tool — only your browser's memory capacity.
Hexadecimal digits can be represented in uppercase (A-F) or lowercase (a-f). Both represent the same value. The choice is purely cosmetic — select the format that matches your needs.