Free Online Security Tools
Free online security and cryptography tools. Generate hashes, passwords, JWT tokens, and encrypt files — all in-browser.
8 tools available
MD5 生成器
从文本或文件生成 MD5 哈希
SHA256 哈希生成器
生成 SHA256 哈希
SHA512 哈希生成器
生成 SHA512 哈希
JWT 解码器
解码 JWT 令牌
密码生成器
生成安全密码
JWT 生成器
使用 HS256 生成 JWT 令牌
ENV 差异比较器
带密钥检测的 .env 文件比较、审计和合并工具
带密码的 ZIP
本地压缩和加密文件 — 无需上传，无需服务器。
Related Use Cases
Explore Other Categories
About Free Online Security Tools
Free online security and cryptography tools. Generate hashes, passwords, JWT tokens, and encrypt files — all in-browser. All tools are 100% free, work entirely in your browser for maximum privacy, and require no installation or sign-up. Whether you're debugging, converting data formats, or generating code, our free online security tools help you work faster and smarter.
Why Choose Our Tools?
- Privacy-First: All processing happens in your browser — no data leaves your device.
- Instant Results: Client-side processing means zero server delays.
- No Sign-Up: Start using any tool immediately, no registration required.
- Multilingual: Available in 10 languages for developers worldwide.