Online Hash Generator - SHA-256, SHA-512, SHA-1

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Secure Online Hash Generator

Hashing is a process of converting data (text or files) into a fixed-size string of characters. It is commonly used for verifying file integrity, storing passwords securely, and digital signatures.

SHA-256: The industry standard for security (used in Bitcoin, SSL).
SHA-512: A more secure version with a longer hash.
SHA-384: A truncated SHA-512, common in TLS and subresource integrity.
SHA-1: Legacy format (mostly for compatibility).

Why use QodeCat Hasher?

Zero Upload Policy

Calculating hashes of sensitive files (like backups or databases) on random websites is dangerous. QodeCat computes the hashes with WebAssembly right in your browser. Your files are processed locally and never uploaded to any server.

FAQ

Q. Why is there no MD5?

MD5 is considered broken because of collision attacks, and browsers do not offer it in their built-in crypto API. Use SHA-256 or SHA-512 for integrity checks. For storing passwords, use a slow hash such as bcrypt (see our Bcrypt Generator).

Q. Can I hash large files?

Yes, even files of several gigabytes. The file is read in small pieces and all four hashes are computed in a single pass, so it never has to fit into memory at once. A progress bar shows how far it is; the speed depends on your device.