Hash Generator
Generate MD5, SHA-1, SHA-256, and other hash values
How to Use This Tool
Select Hash Mode
Choose 'Text' for string hashing, 'File' for file checksums, 'HMAC' for keyed hashing, or 'Compare' to verify hashes.
Choose Hash Algorithms
Select one or more algorithms (MD5, SHA-1, SHA-256, SHA-512, etc.). Multiple algorithms can be selected for comparison.
Enter Your Input
For text mode, type or paste content. For file mode, upload any file. For HMAC, provide both text and secret key.
Generate Hashes
Hashes are generated automatically as you type. For files, hashes appear after upload completes.
Copy or Compare Results
Click the copy button next to any hash. In Compare mode, the tool checks if your input matches the provided hash.
Pro Tips
- •MD5 and SHA-1 are marked as insecure and should not be used for security purposes
- •SHA-256 is the recommended algorithm for most use cases
- •HMAC adds a secret key to the hashing process for message authentication
- •File hashing is useful for verifying file integrity and detecting changes
- •The Compare mode automatically detects which algorithm was used for a given hash
- •Hashes are one-way functions - you cannot reverse a hash to get the original input
Cryptographic Hash Functions and Security
Cryptographic hash functions are mathematical algorithms that transform data of arbitrary size into a fixed-size output called a hash or digest. These one-way functions are fundamental to modern cryptography and cybersecurity, providing data integrity verification, password storage, digital signatures, and blockchain technology. Hash functions produce unique fingerprints for data, where even a tiny change in input creates a completely different output, making them essential for detecting tampering and ensuring authenticity.
Key Features
Multiple hash algorithms including MD5, SHA-1, SHA-256, SHA-512, and SHA-3 variants
HMAC (Hash-based Message Authentication Code) generation with custom secret keys
File integrity verification through checksum generation for any file type
Real-time hash comparison tool to verify data integrity
Security warnings for deprecated algorithms like MD5 and SHA-1
Batch processing with multiple algorithms simultaneously
Character count and bit length information for each hash
Support for large files with streaming hash computation
Common Use Cases
Verifying file integrity after downloads by comparing checksums to detect corruption or tampering
Securely storing passwords by hashing them before database storage, preventing plaintext exposure
Creating digital signatures for documents and software to ensure authenticity and non-repudiation
Generating unique identifiers for data deduplication in storage systems and content delivery networks
Implementing blockchain and cryptocurrency systems where hash functions secure transaction chains