Best Security & Crypto Tools for Developers
Security is critical for every application. SWE Helper provides a comprehensive set of browser-based security tools — from hash generation and JWT decoding to password generation and RSA key creation. All tools run locally, so your sensitive data stays private.
Tools Compared
Hash Generator (MD5, SHA-1, SHA-256, SHA-512)
Security & CryptoCompute MD5, SHA-1, SHA-256, and SHA-512 hashes of any text using the Web Crypto API. 100% client-side.
Try it free →JWT Decoder
Security & CryptoDecode JSON Web Tokens (JWT) to inspect header, payload, and expiration status. No verification — just decoding.
Try it free →Password Generator
Security & CryptoGenerate cryptographically strong random passwords with customizable length and character sets.
Try it free →RSA Key Pair Generator
Security & CryptoGenerate RSA public/private key pairs (2048 or 4096 bit) in PEM format using the Web Crypto API.
Try it free →HMAC Generator
Security & CryptoCompute HMAC (Hash-based Message Authentication Code) using SHA-256, SHA-512, or SHA-1 with the Web Crypto API.
Try it free →TOTP Code Generator
Security & CryptoGenerate Time-based One-Time Passwords (TOTP) from a Base32 secret. Compatible with Google Authenticator.
Try it free →Password Strength Checker
Security & CryptoAnalyze password strength by checking length, character diversity, common patterns, and entropy.
Try it free →PEM / Certificate Decoder
Security & CryptoDecode PEM-encoded certificates, public keys, and private keys. Shows type, size, and hex dump.
Try it free →Quick Comparison
| Feature | 🔑 Hash Generator (MD5, SHA-1, SHA-256, SHA-512) | 🎫 JWT Decoder | 🔒 Password Generator | 🗝️ RSA Key Pair Generator | 🔏 HMAC Generator | ⏱️ TOTP Code Generator | 💪 Password Strength Checker | 📜 PEM / Certificate Decoder |
|---|---|---|---|---|---|---|---|---|
| Free | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| Browser-based | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| No signup | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| Data privacy | ✅ 100% local | ✅ 100% local | ✅ 100% local | ✅ 100% local | ✅ 100% local | ✅ 100% local | ✅ 100% local | ✅ 100% local |
❓ Frequently Asked Questions
Is it safe to use online security tools?
SWE Helper's security tools are unique because they run 100% in your browser. Unlike server-based tools, your passwords, keys, and tokens never leave your device.
Which hash algorithm should I use?
For passwords, use bcrypt or Argon2 (server-side). For checksums and integrity verification, SHA-256 is the standard. MD5 and SHA-1 are considered insecure for cryptographic purposes.