A hash is a fixed-length fingerprint of data. The same input always produces the same hash.

MD5 is not secure for cryptographic purposes. Use SHA-256 or better for security.

Can hashes be reversed?

No — hashing is a one-way function. You cannot reverse a hash to get the original data.

What are hashes used for?

File integrity verification, password storage (with salting), and digital signatures.

Yes, using the Web Crypto API. No data is sent to any server.

file checksum

Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files. Browser-based, private.

Input text

Type text or upload a file to hash.

Choose MD5, SHA-1, SHA-256, or SHA-512.

Copy the generated hash to your clipboard.

Encode and decode Base64 strings online. Also supports file to Base64 encoding for data URIs.

Generate strong, random, and secure passwords instantly. Customize length and character types.

Generate random UUIDs (v4) and NIL UUIDs. Generate up to 100 UUIDs at once.