随机 Hex 生成器
生成自定长度和数量的随机十六进制数值
快速预设
使用方法
输入数值
在输入栏中填入您的数字或参数。
即时获取结果
结果在您输入时自动更新——无需按计算按钮。
复制或保存
将结果复制到剪贴板或用于您的工作流程。
为什么使用此工具
100% 免费
没有隐藏费用，没有付费等级——所有功能完全免费。
无需安装
完全在浏览器中运行。无需下载或安装任何软件。
隐私且安全
您的数据永远不会离开您的设备。不会上传至任何服务器。
支持移动设备
完全响应式设计——在手机、平板或桌面电脑上均可使用。
Random Hex String Generation for Development and Security
Key Takeaways
- Random hex strings represent binary data as hexadecimal characters (0-9, a-f), with each character encoding 4 bits of information.
- Cryptographically secure hex strings are essential for session IDs, tokens, nonces, and encryption keys.
- All hex generation uses your browser's cryptographic random number generator — values are never stored or transmitted.
Random hexadecimal strings are a fundamental building block in software development and security. From generating session identifiers and API keys to creating color codes and test data, hex strings provide a compact and universally supported format for representing random binary data. The security of these strings depends entirely on the quality of the random number generator used.
A 32-character hex string provides 128 bits of entropy — equivalent to the security of an AES-128 encryption key.
Security Strength
Common Use Cases
Session Identifiers
Generate unpredictable session IDs for web applications where session hijacking resistance is critical.
Encryption Keys and IVs
Create random hex values for AES encryption keys (32 or 64 hex chars) and initialization vectors (32 hex chars) in cryptographic operations.
Color Code Generation
Generate random 6-character hex color codes for design mockups, data visualization palettes, and UI prototyping.
Test Data Creation
Produce random hex strings for populating test databases, simulating binary data, and creating unique test identifiers.
Pro Tips
Always use crypto.getRandomValues() for security-sensitive hex strings — Math.random().toString(16) is predictable and insecure.
For 128-bit security, generate at least 32 hex characters (16 bytes). For 256-bit, use 64 hex characters (32 bytes).
Prefix generated hex strings with a context identifier (e.g., 'sess_', 'key_') to make debugging and log analysis easier.
Hex encoding doubles the length of binary data — 16 random bytes become 32 hex characters.
All random hex strings are generated entirely in your browser using the Web Crypto API's cryptographically secure random number generator. No values are stored or transmitted to any server.