Free Security & IT Tools
15 professional tools for security engineers, cloud ops, and developers. Passive, privacy-focused, free.
Just Launched
Domain Security Report
Full passive security report for any domain: SSL, security headers, email security, technology stack, known CVEs, and subdomains. Nothing uploaded.
Email Security Checker
Test if your domain is vulnerable to email spoofing. Check SPF, DMARC, DKIM, and MTA-STS records instantly. Get a clear verdict and fix recommendations.
Security & Reconnaissance
7 toolsScan, assess, and harden your domains and infrastructure — all passive, nothing uploaded.
Domain Security Report
Full passive security report for any domain: SSL, security headers, email security, technology stack, known CVEs, and subdomains. Nothing uploaded.
Email Security Checker
Test if your domain is vulnerable to email spoofing. Check SPF, DMARC, DKIM, and MTA-STS records instantly. Get a clear verdict and fix recommendations.
Vulnerability Scanner
Scan websites for security misconfigurations, missing security headers, SSL issues, and common vulnerabilities.
SSL Certificate Monitor
Check SSL/TLS certificates for any domain. Certificate Transparency logs, subdomain discovery, bulk check up to 10 sites.
HTTP Header Checker
Analyze HTTP response headers for any URL. Check security headers, caching, CORS, and server configuration.
Password Generator
Generate cryptographically secure passwords with customizable length and character sets. Uses Web Crypto API for true randomness.
Hash Generator
Generate SHA-256, SHA-384, SHA-512, and SHA-1 cryptographic hashes for text and files.
Networking & DNS
4 toolsDiagnose DNS records, look up IPs, plan subnets, and query domain registration data.
DNS Lookup
Look up DNS records for any domain. Check A, AAAA, MX, CNAME, NS, TXT, and SOA records.
IP Address Lookup
Find the country, city, ISP, organization, and ASN for any IP address. Useful for security investigations, threat hunting, and network troubleshooting.
Whois Lookup
Look up domain registration details including registrar, creation date, expiry, nameservers, and DNSSEC status.
Subnet Calculator
Calculate network addresses, broadcast addresses, usable hosts, and subnet masks from IP addresses and CIDR notation.
Development Utilities
4 toolsEveryday helpers — decode JWTs, format JSON, encode Base64, and parse CRON expressions. All run in your browser.
JWT Decoder
Decode and inspect JSON Web Tokens (JWT). View header, payload, claims, and check expiration.
JSON Formatter & Validator
Format, beautify, and validate JSON instantly. Syntax error detection with descriptive messages. Minify JSON for production. Runs entirely in your browser.
Base64 Encoder/Decoder
Encode and decode Base64 strings instantly. Supports text and file encoding with URL-safe mode.
CRON Expression Parser
Translate CRON expressions to plain English. Preview the next 5 scheduled run times. Use presets for common schedules like hourly, daily, weekly.
Why Use Protego Tools?
Built by security professionals, for security professionals.
Privacy First
All processing happens in your browser. Your data never leaves your device.
Instant Results
No waiting for servers. Get results instantly with client-side processing.
Professional Grade
Built using industry standards and best practices for accuracy.
100% Free
No subscriptions, no hidden fees. Free tools for the community.
Tools for Every Role
Whether you are a security engineer, cloud ops engineer, or developer, these tools fit your workflow.
Security Engineers
- ✓Generate a full passive attack surface report for any domain
- ✓Check if a domain can be spoofed for phishing
- ✓Discover subdomains via Certificate Transparency logs
- ✓Scan for missing security headers and SSL issues
Cloud Ops Engineers
- ✓Query DNS and verify record propagation
- ✓Look up ASN, ISP, and geolocation for any IP
- ✓Calculate subnets and plan IP addressing
- ✓Verify domain registration and nameservers
Developers
- ✓Decode and debug JWT tokens in API integrations
- ✓Format and validate JSON payloads instantly
- ✓Encode/decode Base64 for data transmission
- ✓Translate CRON expressions to plain English
Frequently Asked Questions
Are these security tools really free?
Is my data safe when using these tools?
What does the Domain Security Report check?
Can I use these tools for professional security audits?
Do I need to install anything?
Need a Custom Tool?
We're always working on new tools. Let us know what you need and we'll consider it for our roadmap.
Request a Tool