Free Cybersecurity Tools for
Security Engineers and Developers
Free, open, browser-based security toolkit. No signup, no backend, no API calls, no data collection. Every tool runs entirely in your browser because your data should never leave your machine.
Tools
Reverse Shell Generator
Generate reverse shell payloads in Bash, Python, PHP, PowerShell, Netcat, and more. All generated locally in your browser.
ExploitationBase64 Encoder / Decoder
UTF-8 safe Base64 encoding and decoding. Encode text to Base64 or decode Base64 back to plain text instantly.
EncodingJWT Decoder
Decode and inspect JWT tokens. View header, payload, and claims with syntax highlighting — all processing happens locally.
Web SecurityHash Generator
Generate SHA-256, SHA-512, SHA-1, and MD5 hashes from any input. Uses the Web Crypto API — no data sent anywhere.
CryptographyCertificate Decoder
Parse X.509 certificates (PEM format). View subject, issuer, validity, fingerprints, and extensions without sending data to a server.
CryptographyCVSS Calculator
Calculate CVSS v3.1 base scores interactively. Adjust attack vector, complexity, privileges, and impact metrics to get the severity rating.
Risk Assessment