What is a hash function?

A hash function is a cryptographic algorithm that converts input data of any size into a fixed-size string of bytes (hash). The output is unique to the input - even a tiny change produces a completely different hash. Hash functions are used for data integrity verification, password storage, and digital signatures.

Which hash algorithm should I use?

For modern security applications, use SHA-256 or SHA-512. MD5 and SHA-1 are considered cryptographically broken and should only be used for non-security purposes like checksums. SHA-256 is the most widely used secure hash algorithm today, offering a good balance of security and performance.

Can I hash files with this tool?

Yes, you can hash files of any size. Simply drag and drop your file into the upload area or click to browse. The tool will calculate the hash locally in your browser, so your files never leave your device. This is useful for verifying file integrity or generating checksums.

Are hashes reversible?

No, hash functions are one-way operations and cannot be reversed to recover the original input. This property makes hashes useful for password storage - you can verify a password by hashing it and comparing hashes, without storing the actual password.

Is this hash generator free?

Yes, this hash generator is completely free with no limitations. Generate unlimited hashes, no registration required, and all processing happens in your browser for privacy and security.

Hash Generator

Generate cryptographic hashes (SHA-1, SHA-256, SHA-384, SHA-512)

Text Input

Enter text to generate hashes

Security Warning

This tool is for learning and development purposes only. Do not use for production security.

SHA-1 is cryptographically broken and should not be used for security purposes. Use SHA-256 or higher.

Tips

• SHA-256 is recommended for most use cases (password hashing, file verification, etc.)

• SHA-1 is deprecated and should only be used for legacy compatibility

• File hashes are useful for verifying file integrity and detecting tampering

• All hash calculations are performed locally in your browser using Web Crypto API