Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hash values
Input Text
Features
Professional hash value generation tool
Multi-Algorithm Support
Supports MD5, SHA-1, SHA-256, SHA-384, SHA-512 algorithms
File Hashing
Support file upload to calculate hash values and verify file integrity
Parallel Computing
Generate all algorithm hash values simultaneously with one input
Standard Output
Output standard hexadecimal hash strings for easy comparison and verification
Secure Algorithm
Uses Web Crypto API to ensure accurate and reliable calculation results
Privacy Protection
All calculations are done locally in the browser, files and data are never uploaded
Frequently Asked Questions
Common questions about hash generation
What is a hash value? What is it used for?
A hash value is a fixed-length string converted from data of any length through a hash algorithm, commonly used for: • Verifying file integrity (compare hash values after downloading files) • Password storage (store password hash values instead of plaintext) • Data verification (ensure data has not been tampered with during transmission) • Digital signatures and certificates
Which hash algorithm should I choose?
MD5: Fast but insecure, only for non-security scenarios. SHA-1: Collision attacks found, not recommended for security scenarios. SHA-256: Most commonly used, high security, recommended. SHA-384/512: Higher security, suitable for high-security requirement scenarios.
Can I reverse the original text from a hash value?
No. Hash is a one-way function, you cannot reverse the original data from a hash value. However, simple content may be cracked by rainbow tables (pre-computed hash value lookup tables), so password storage should be salted before hashing.
Why do the same content have different hash values?
Possible reasons: • Content contains invisible characters (such as spaces, line breaks) • Different encoding methods (such as UTF-8 vs GBK) • File contains BOM header • Different hash algorithms are used
Will large files affect calculation?
Large files will require longer calculation time, depending on your device performance. Modern browsers use Web Crypto API for hardware acceleration, files of several hundred MB can usually be completed in seconds. Please do not close the page during calculation.