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Multi-algorithm hash generator for file integrity verification, checksums, and HMAC-based message authentication. Supports MD5, SHA-1, SHA-256, SHA-512, SHA-3, RIPEMD-160 with batch processing.
Multi-algorithm hash generation with HMAC support for data integrity and authentication
🔐 Text-Based Hash Generator
💡 For file checksums with CRC32: Use the Checksum Calculator
💡 For password hashing: Use the Salted Hash Generator
Use HMAC for message authentication and data integrity verification with a secret key
A hash function is a mathematical algorithm that converts input data of any size into a fixed-size string of characters, called a hash or digest. Hash functions are one-way operations - you cannot reverse the process to get the original input from the hash.
| Algorithm | Output Size | Security | Speed | Best Use |
|---|---|---|---|---|
| MD5 | 128 bits (32 hex) | Broken | Very Fast | Legacy systems only, checksums (non-security) |
| SHA-1 | 160 bits (40 hex) | Deprecated | Fast | Git commits, legacy applications |
| SHA-256 | 256 bits (64 hex) | Secure | Fast | General purpose, Bitcoin, SSL certificates |
| SHA-512 | 512 bits (128 hex) | Very Secure | Medium | High security applications, password hashing |
| SHA-3 | 512 bits (128 hex) | Latest Standard | Medium | Future-proof applications, quantum resistance |
| RIPEMD-160 | 160 bits (40 hex) | Secure | Fast | Bitcoin addresses, cryptocurrency |
MD5 and SHA-1 are vulnerable to collision attacks. Don't use for passwords, digital signatures, or security-critical applications.
SHA-256 and SHA-512 are industry standards. Use SHA-256 for general purpose, SHA-512 for maximum security.
SHA-3 is the latest NIST standard with different internal structure, providing additional security margin.
HMAC is a mechanism for message authentication using cryptographic hash functions combined with a secret key. It provides both data integrity and authentication, ensuring the message hasn't been tampered with and comes from a legitimate source.
Regular Hash:
Anyone can compute the hash. No authentication. Only verifies data integrity.
HMAC:
Requires secret key. Provides authentication. Verifies both integrity and authenticity.
Never store passwords in plain text. Hash them with salt and use algorithms like bcrypt, scrypt, or Argon2.
Verify downloaded files haven't been corrupted or tampered with by comparing hash values.
Bitcoin and other cryptocurrencies use SHA-256 to link blocks and create immutable ledgers.
Hash documents before signing to ensure authenticity and non-repudiation.
Git uses SHA-1 hashes to identify commits, trees, and blobs in the repository.
HTTPS uses hash functions to verify certificate authenticity and establish secure connections.
A salt is random data added to passwords before hashing. It prevents rainbow table attacks and ensures identical passwords have different hashes.
❌ Without Salt:
hash("password123") = abc123...hash("password123") = abc123...Same hash = vulnerable to rainbow tables
✓ With Salt:
hash("password123" + "salt1") = xyz789...hash("password123" + "salt2") = def456...Different hashes = much more secure
No. Hash functions are one-way operations designed to be irreversible. You cannot mathematically reverse a hash to recover the original input. This fundamental property makes hashes useful for security purposes like password storage and data integrity verification.
Hashing is one-way (cannot be reversed), while encryption is two-way (can be decrypted with a key). Use hashing for data integrity and password storage. Use encryption when you need to retrieve the original data later.
For general purpose: SHA-256. For maximum security: SHA-512 or SHA-3. For password storage: bcrypt, scrypt, or Argon2 (not simple SHA). Avoid MD5 and SHA-1 for security-critical applications.
Yes. All hashing is performed client-side in your browser using JavaScript. No data is sent to any server. However, for highly sensitive data, consider using offline tools or command-line utilities.
A collision occurs when two different inputs produce the same hash output. Cryptographically secure hash functions should make collisions extremely difficult to find. MD5 and SHA-1 are vulnerable to collision attacks.
1) Download the file and the published hash from the official source. 2) Generate the hash of your downloaded file using this tool. 3) Compare the two hashes - they should match exactly. If they don't, the file may be corrupted or tampered with.