Which hash algorithm should I use?

For security applications, use SHA-256 or SHA-512. MD5 and SHA-1 are considered weak for security but are still useful for non-cryptographic purposes like checksums. Never use MD5 or SHA-1 for password hashing.

Can hashes be reversed?

No, cryptographic hash functions are one-way. You cannot reverse a hash to get the original data. However, weak hashes like MD5 can be cracked using rainbow tables for common inputs.

Are my files uploaded to your server?

No! All hashing happens entirely in your browser using JavaScript. Your files never leave your device, ensuring complete privacy and security.

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MD5、SHA-1、SHA-256ハッシュを生成

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Generate cryptographic hashes with our free hash generator. Support for MD5, SHA-1, SHA-256, SHA-512, and more. Perfect for verifying file integrity, password hashing, data validation, and security applications. All processing happens locally in your browser for maximum privacy.

Enter your text or upload a file
Select the hash algorithm (MD5, SHA-256, etc.)
Click 'Generate Hash'
Copy the hash value
Use for verification, comparison, or storage

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