Hash Generator

Generate SHA-1, SHA-256, SHA-384, and SHA-512 hash values for text verification

Security

Converter

Cryptography

Text to Hash

About Hash Functions

SHA-1 (160-bit)

Legacy algorithm, now considered cryptographically broken. Should not be used for security purposes. Included for compatibility with older systems.

SHA-256 (256-bit)

Most widely used SHA-2 algorithm. Cryptographically secure and recommended for most security applications including digital signatures and certificates.

SHA-384 (384-bit)

Truncated version of SHA-512. Offers higher security than SHA-256 with better performance than SHA-512 on 64-bit systems.

SHA-512 (512-bit)

Strongest algorithm in the SHA-2 family. Provides the highest security level and is ideal for high-security applications and long-term data protection.

Common Use Cases

Digital signatures and certificates
Password storage (with salt)
File integrity verification
Blockchain and cryptocurrency
Data deduplication

Security Note

All processing happens locally in your browser using the Web Crypto API. No data is transmitted to external servers, ensuring your sensitive information remains private and secure.

Frequently Asked Questions (FAQ)

Are hash functions random or unique?

Hash functions are deterministic, not random: the same input always produces the same output. Hash codes are not guaranteed to be unique, but good hash algorithms make collisions (two inputs with the same hash) extremely rare.

Which hash algorithm should I use?

For most security applications, use SHA-256 or stronger (SHA-384, SHA-512). MD5 and SHA-1 are considered insecure and should be avoided for cryptographic purposes.

Which hash algorithm is the fastest?

MD5 is generally the fastest, but it is insecure. SHA-1 is also fast but insecure. SHA-256 is slower but much more secure and widely recommended.

Which hash algorithm is the most secure?

SHA-512 is the strongest among the SHA-2 family, followed by SHA-384 and SHA-256. For most purposes, SHA-256 offers a good balance of security and performance.

How many possible SHA-256 hashes are there?

SHA-256 produces a 256-bit hash, so there are 2^256 possible hashes—an astronomically large number.

Can you decrypt a SHA-256 hash?

No, SHA-256 is a one-way function. It cannot be decrypted or reversed to reveal the original input.

How long does it take to crack a SHA-256 hash?

Cracking SHA-256 by brute force is computationally infeasible with current technology due to the vast number of possible hashes.

Is SHA-256 hash case insensitive?

No, SHA-256 is case sensitive. Changing the case of any character in the input will produce a completely different hash.

Why is SHA-256 more reliable than MD5 for hashing?

SHA-256 is more resistant to collisions and preimage attacks than MD5, making it much more secure for cryptographic use.