File Hash Calculator

A file hash (or checksum) is a fixed-size string computed from the contents of a file. Even a tiny change to the file produces a completely different hash, making hashes ideal for verifying file integrity — for example, confirming a download wasn't corrupted or tampered with.

MD5 produces a 128-bit hash. While no longer recommended for security purposes, it's still widely used for quick integrity checks and is commonly listed on download pages.

SHA-1 produces a 160-bit hash. It's used in Git for commit IDs and some legacy systems, but is considered weak for cryptographic purposes.

SHA-256 is the modern standard for file verification, producing a 256-bit hash. It's used by package managers, software distributors, and blockchain systems.

SHA-384 and SHA-512 provide even longer hashes (384 and 512 bits respectively) for applications that require extra collision resistance.

All hashing is performed entirely in your browser using the Web Crypto API (SHA) and a pure JavaScript implementation (MD5). Your files are never uploaded to any server.