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 to a bit string of a fixed size. Hash values are commonly used to 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 to 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 to reverse the process.
MD5 is no longer considered cryptographically secure due to 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.