FREE ONLINE TOOLS
🔒 Free Security Tools
Browse 7 free security tools on FastTool. All tools run in your browser with no signup required.
About Our Security Tools
Online security starts with strong fundamentals. FastTool's free security tools help you generate strong passwords, hash text, encode and decode data, and check encryption outputs. Every operation runs entirely in your browser so your sensitive data, passwords, and keys are never transmitted over the network. Whether you are a developer implementing authentication, a system admin hardening servers, or an everyday user improving personal security, these tools give you reliable results with zero risk of data exposure. No accounts, no logs, no tracking.
All Security Tools (7)
Secure Password Generator Popular
Generate strong passwords with custom length and character sets.
Hash Generator (SHA/MD5)
Generate SHA-256, SHA-1, and SHA-512 hashes for text or files.
Password Strength Checker
Check password strength with entropy and crack time estimates.
IP Address Lookup
Look up your public IP address and network info.
Encryption Tool
Encrypt and decrypt text with AES-256 in the browser.
CSP Header Generator
Generate Content-Security-Policy HTTP headers for your web app — configure default-src, script-src, style-src, img-src, font-src, and more.
File Hash Calculator
Calculate SHA-1, SHA-256, and SHA-512 cryptographic hash values for any file or text input directly in your browser. Verify file integrity, detect tampering, and confirm checksums — no server upload required.