Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or a file — free, nothing ever uploaded.
A hash function takes any input — text or a file — and produces a fixed-length string that acts as a unique "fingerprint" of that exact content. Even a single-character change produces a completely different hash. Hashes are used to verify file integrity (confirming a download wasn't corrupted or tampered with), detect duplicate content, and store passwords without keeping the plain text.
SHA hashes are computed using your browser's native Web Crypto API; MD5 uses a local JavaScript implementation. Nothing you type or upload here ever leaves your device.
No — hashing is a one-way function by design; there's no way to recover the original input from the hash alone, which is what makes hashes useful for storing passwords securely.
Researchers have demonstrated practical ways to create two different inputs with the same MD5 or SHA-1 hash. This undermines their use for security purposes — they're still fine for basic checksums, just not for anything security-sensitive.
Yes — a given input always produces the exact same hash with the same algorithm, which is what makes hashes useful for verifying a file hasn't changed.