Free Hash Generator

A hash function takes any input (text, file, data) and produces a fixed-length string of characters called a hash or digest. The same input always produces the same hash, but even a tiny change in the input produces a completely different hash. This makes hashes useful for verifying data integrity — if a file's hash matches the expected hash, the file is unaltered.

These algorithms produce different output sizes and offer varying security levels. MD5 produces a 128-bit (32 hex char) hash — fast but cryptographically broken. SHA-1 produces 160 bits (40 chars) — also considered weak for security. SHA-256 produces 256 bits (64 chars) — widely used and secure. SHA-512 produces 512 bits (128 chars) — strongest of the four.

No. MD5 and SHA-1 should never be used for password hashing. They are too fast, making them vulnerable to brute-force attacks. For passwords, use bcrypt, Argon2, or scrypt — algorithms specifically designed to be slow and GPU-resistant. MD5 is still useful for non-security purposes like checksums and deduplication.

When a website provides a SHA-256 checksum for a download, switch to "File Upload" mode, select the downloaded file, then copy the SHA-256 output and compare it to the expected checksum. If they match, the file is unmodified. If they differ, the file may be corrupted or tampered with.

Yes, completely safe. All hashing runs 100% in your browser. Your text and files are never uploaded or sent to any server. SHA-1, SHA-256, and SHA-512 use the browser's native Web Crypto API. MD5 runs via a local JavaScript implementation. Nothing leaves your device.