文字列ハッシュビジュアライザー
Enter text to compute and visually compare MD5, SHA-1, SHA-256 and SHA-512 hashes with colour blocks.
How It Works
- Enter your text: Type or paste any string — a password, file content, identifier, or any text you want to hash.
- Choose an algorithm: Select MD5, SHA-1, SHA-256, SHA-384, or SHA-512 depending on your use case.
- Copy the hash: The hash value appears instantly. Copy it for storage, comparison, or verification.
Why Use String Hash Generator?
Hashing converts any string into a fixed-length fingerprint that is unique to its content. Even a one-character change produces a completely different hash. This is essential for verifying data integrity, storing passwords securely, generating cache keys, deduplicating records, and creating content-based identifiers. Because hashing is one-way, you cannot reverse a hash to get the original text — making it safe for storing sensitive data.
Features
- Multiple algorithms: MD5, SHA-1, SHA-256, SHA-384, and SHA-512 all available in one tool.
- Real-time hashing: Hash updates instantly as you type — no button click required.
- Case-sensitive processing: "Hello" and "hello" produce different hashes by design.
- Copy to clipboard: One-click copy of the hash value.
- 100% browser-based: Strings never leave your device — safe for sensitive content.
Frequently Asked Questions
Which hash algorithm should I use?
For security-sensitive applications (passwords, signatures), use SHA-256 or SHA-512. MD5 and SHA-1 are deprecated for security but still useful for checksums and cache keys where cryptographic strength is not required.
Can I use this to hash passwords for storage?
String hashing gives you a one-way hash, but for password storage you should use a key-derivation function like bcrypt, Argon2, or PBKDF2 that incorporates salting and iteration. Simple SHA hashes are too fast and vulnerable to rainbow table attacks.
Are hashes reversible?
No. Hash functions are one-way — you cannot recover the original string from its hash. If two strings produce the same hash (a collision), that is a flaw in the algorithm. SHA-256 and SHA-512 have no known practical collisions.