Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly -- all processing happens in your browser
Drop a file here or click to browse
Any file type supported
Privacy First
All hashing is done in your browser using the Web Crypto API. Your data never leaves your device.
Real-Time Hashing
See hash results update instantly as you type. No need to click a button -- hashes generate on every keystroke.
File & HMAC Support
Hash files via drag-and-drop and generate HMAC with a secret key for message authentication.
Frequently Asked Questions
What is a hash function?
A hash function is a mathematical algorithm that maps data of arbitrary size to a fixed-size string of characters. It is a one-way function, meaning you cannot reverse a hash back to its original input. Hash functions are widely used in cryptography, data integrity verification, password storage, and digital signatures.
What is the difference between MD5, SHA-1, and SHA-256?
MD5 produces a 128-bit hash (32 hex characters), SHA-1 produces a 160-bit hash (40 hex characters), and SHA-256 produces a 256-bit hash (64 hex characters). MD5 and SHA-1 are considered cryptographically broken and should not be used for security purposes. SHA-256 and SHA-512 are part of the SHA-2 family and are currently recommended for security applications.
What is HMAC?
HMAC (Hash-based Message Authentication Code) is a mechanism that uses a cryptographic hash function along with a secret key to produce a message authentication code. It provides both data integrity and authentication, verifying that a message has not been altered and that it comes from the expected sender who possesses the shared secret key.
Is my data safe when using this hash generator?
Yes. All hashing is performed entirely in your browser using the Web Crypto API. No data is ever sent to any server. Your input text, files, and HMAC keys remain completely private and never leave your device.
When should I use SHA-256 vs SHA-512?
SHA-256 is sufficient for most use cases including digital signatures, certificate generation, and password hashing with proper salting. SHA-512 provides a longer hash (128 hex characters vs 64) and may offer better security margins for highly sensitive applications. On 64-bit systems, SHA-512 can also be faster due to its 64-bit word size.
Can I use this to verify file downloads?
Yes. Use the file hashing feature to drag and drop a downloaded file and generate its hash. Compare the result against the checksum provided by the file publisher. If the hashes match, the file has not been tampered with during download.
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