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 產生器
從文字或檔案產生 MD5 雜湊值
SHA256 哈希生成器
生成 SHA256 哈希
SHA512雜湊生成器
生成SHA512雜湊
JWT 解碼器
解碼 JWT 令牌
密碼生成器
生成安全密碼
JWT 產生器
使用 HS256 產生 JWT 令牌
ENV 差異比較器
帶密鑰檢測的 .env 檔案比較、審計和合併工具
帶密碼的 ZIP
本機壓縮和加密檔案 — 無需上傳，無需伺服器。
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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.