What is a hash function?

A hash function takes input data and produces a fixed-size string of characters (hash). The same input always produces the same hash, but you cannot reverse a hash back to the original data.

Which hash algorithm should I use?

SHA-256 is recommended for most purposes. SHA-512 offers more security. MD5 and SHA-1 are considered weak for security but are still used for checksums.

Yes. All hash computation happens in your browser using the Web Crypto API. No data is sent to any server.

ハッシュジェネレーター

任意のテキストからSHA-1、SHA-256、SHA-384、SHA-512ハッシュを生成。

Input Text

Uppercase

About Hash Functions

Cryptographic hash functions generate a fixed-size hash value from input data. They're used for data integrity verification, password storage, digital signatures, and more. SHA-256 is the most commonly used algorithm today.

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{ }JSONフォーマッター B64Base64エンコーダー/デコーダー %20URLエンコーダー/デコーダー IDUUIDジェネレーター

How to Use

Enter or paste your text in the input field
Click 'Generate Hashes' to compute all hash values
Toggle 'Uppercase' for uppercase hex output
Copy any hash value with the copy button

Common Use Cases

Verifying file integrity with checksums
Password hashing for storage
Data deduplication
Digital signatures and certificates

ハッシュジェネレーター

About Hash Functions

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How to Use

Common Use Cases

Frequently Asked Questions