哈希生成器
输入文本或上传文件，生成多种哈希值。支持 MD5、SHA-1、SHA-256 等常见算法。
拖放文件到此处
或点击选择文件
计算中...
What is Hash Generator?
Hash Generator is a free online tool for calculating hash values (Hash) of text or files. Hash is an algorithm that converts data of any length into a fixed-length string, widely used in data integrity verification, password storage, digital signatures, and other fields.
This tool runs entirely in your browser without uploading data to the server, ensuring your data privacy and security.
How to Use This Tool?
Our tool is designed to be intuitive with just a few simple steps:
- Select Input Mode: Switch between “Text” and “File” modes.
- Enter Data:
- Text mode: Directly enter or paste the text you want to hash in the text box
- File mode: Drag and drop a file to the file area, or click to select a file
- Select Algorithm: Choose the hash algorithm you need (MD5, SHA-1, SHA-256, SHA-512).
- Get Results: Click the “Calculate Hash” button to view the hash value in the result area.
- Copy Results: Click the “Copy” button to copy the hash value to clipboard.
Key Features
- Multiple Algorithms: Supports MD5, SHA-1, SHA-256, SHA-512 and more
- Dual Input: Text input and file drag-and-drop support
- Real-time Calculation: Instant hash generation as you type
- Copy to Clipboard: One-click copy of hash results
- Bilingual Support: Complete Chinese and English interface
- Client-side Processing: Data stays on your device, protecting your privacy
Algorithm Comparison
| Algorithm | Output Length | Bits | Security | Use Case |
|---|---|---|---|---|
| MD5 | 32 chars | 128-bit | ⚠️ Not recommended for security | General checksum, file verification |
| SHA-1 | 40 chars | 160-bit | ⚠️ Not recommended for security | Git commits, certificate signing |
| SHA-256 | 64 chars | 256-bit | ✅ Secure | Security verification, blockchain |
| SHA-512 | 128 chars | 512-bit | ✅ More Secure | High security needs |
Applications
- File Integrity Check: Calculate hash after downloading to verify against official hash, confirm file hasn’t been tampered with
- Password Storage: Store password hashes in database instead of plain text; even if database is leaked, original passwords cannot be recovered
- Digital Signature: Used to verify data integrity and source
- Version Verification: Software releases include hash values for users to verify download file integrity
Frequently Asked Questions (FAQ)
Is this tool safe?
Absolutely safe. This tool runs entirely in your browser (client-side processing). Your text or file is not uploaded to any server. All hash calculations are performed locally.
Can I still use MD5 and SHA-1?
MD5 and SHA-1 have known collision attack vulnerabilities, so they are not recommended for security-related scenarios (such as password storage, digital signatures). However, they are still suitable for non-security purposes like file integrity verification.
For security requirements, it is recommended to use SHA-256 or SHA-512 algorithms.
What is the maximum file size supported?
Browsers have certain limitations on file size (typically recommended not to exceed 100MB). For very large files, it may take longer calculation time or encounter browser memory limitations.
Why is the MD5 value different each time for the same content?
If you find that the MD5 calculated for the same text is different each time, it may be because:
- There are subtle differences in each text input (such as spaces, line breaks)
- Text encoding issues (MD5 values for UTF-8 and GB2312 encodings are different)
Please ensure the input text is exactly the same.