Hash Generator

SHA-256 is recommended for most use cases. MD5 and SHA-1 are considered cryptographically broken but are still useful for checksums and non-security purposes.

Yes! Use the file input to hash any file's contents. The hash is computed entirely in your browser - the file never leaves your computer.

MD5 produces a 128-bit hash and is considered cryptographically broken — collisions can be generated intentionally. SHA-1 produces 160 bits and is also deprecated for security. SHA-256 produces 256 bits and remains secure for all current applications. Use SHA-256 or stronger for any security-sensitive hashing.

No. Cryptographic hash functions are one-way by design. Given only the hash output, there's no mathematical way to recover the original input (this is called pre-image resistance). The only way to 'reverse' a hash is to guess inputs and compare hashes (brute force or rainbow tables).

Both produce fixed-length outputs from variable-length inputs. Checksums (like CRC32) are designed for error detection in data transmission — fast but easy to create collisions. Cryptographic hashes (SHA-256) are designed to resist intentional collisions and are used for security verification.

To verify file integrity after download (compare your hash with the publisher's), to deduplicate files (identical files produce identical hashes), for digital signatures, and to create content-addressable storage where files are identified by their hash.

No. Hashing is one-way - you can't recover the original input from a hash. It's used for data integrity verification, password storage, and digital signatures.