Monitoring
Domain Security Monitor
Verify ownership and monitor TLS, DNS, email security, headers and domain expiry.
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FREE · PRACTICAL · PRIVACY-AWARE
Security Tools Center
Use the complete English collection of password, network, web security and developer utilities from one place.
36 FOCUSED UTILITIES
Choose the check you need.
Local tools process values only in your browser. Network tools query public technical records and never ask for credentials.
36 tools shownNo account required
Monitoring
My Security Dashboard
Bring local learning progress, checklists, reading and recent results into one view.
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Web Security
Site Security Report
Review DNS, TLS, HTTP headers and email protections in one report.
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Password Security
Strong Password Generator
Generate cryptographically secure passwords locally in your browser.
● Browser onlyOpen tool →
Password Security
Password Strength Test
Evaluate length, variety and predictable patterns without sending the password.
● Browser onlyOpen tool →
Developer
Hash Generator
Create SHA-256, SHA-384 or SHA-512 digests from text or local files.
● Browser onlyOpen tool →
Network
IP and Browser Information
See the public IP and technical details shared by your browser.
● Private viewOpen tool →
Network
DNS Lookup
Review common public DNS records for a domain.
● Public checkOpen tool →
Email Security
Email Security Check
Inspect MX, SPF, DMARC, DKIM, MTA-STS and TLS-RPT records.
● Public checkOpen tool →
Web Security
HTTP Security Headers
Check the browser security headers returned by a public HTTPS site.
● Public checkOpen tool →
Web Security
SSL Certificate Check
Inspect certificate validity, issuer, host coverage and TLS details.
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Network
IPv4 Subnet Calculator
Calculate network, broadcast, mask and usable host ranges.
● Browser onlyOpen tool →
Developer
Base64 and URL Tools
Encode and decode Base64 or URL values locally in your browser.
● Browser onlyOpen tool →
Developer
CSP Policy Generator
Build a practical Content-Security-Policy header from safe presets.
● Browser onlyOpen tool →
Network
Domain Intelligence and RDAP
Review registrar, lifecycle dates, status codes, nameservers and DNSSEC.
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Email Security
Email Header Analyzer
Analyze authentication, identity alignment and delivery hops locally.
● Browser onlyOpen tool →
Developer
File Integrity and SRI
Compare files and create SHA or Subresource Integrity values locally.
● Browser onlyOpen tool →
Password Security
Passkey and WebAuthn Readiness
Check secure context, WebAuthn and device authenticator support.
● Browser onlyOpen tool →
Web Security
Phishing URL Analyzer
Inspect suspicious URLs locally without opening or submitting the destination.
● Browser onlyOpen tool →
Developer
Secret Leak Scanner
Find common API key, token and private-key patterns in local text or configuration files.
● Browser onlyOpen tool →
Developer
JWT Inspector
Decode JWT structure locally and review expiry, algorithm and sensitive-claim signals.
● Browser onlyOpen tool →
Monitoring
Incident Response Playbook
Build a practical five-stage response checklist for common cyber incidents.
● Browser onlyOpen tool →
Developer
SBOM and Dependency Viewer
Read CycloneDX and SPDX JSON inventories locally and review version or license gaps.
● Browser onlyOpen tool →
Web Security
Cookie and Session Security Analyzer
Review Secure, HttpOnly, SameSite, scope and prefix rules in Set-Cookie headers.
● Browser onlyOpen tool →
Developer
Local Log Analysis Center
Review Apache, Nginx and SSH logs locally for errors, failed sign-ins, suspicious paths and high-volume sources.
● Browser onlyOpen tool →
Developer
IOC Extractor and Defanger
Extract, deduplicate and safely defang network indicators and common file hashes from incident notes.
● Browser onlyOpen tool →
Developer
CVSS 3.1 Base Score Calculator
Calculate a standards-compatible technical severity score and vector from the eight base metrics.
● Browser onlyOpen tool →
Web Security
QR Code Security Analyzer
Decode supported QR images locally and inspect the payload without opening its destination.
● Browser onlyOpen tool →
Email Security
SPF and DMARC Record Generator
Build reviewable SPF and staged DMARC starter records from explicitly authorized mail sources.
● Browser onlyOpen tool →
Monitoring
Security Maturity Assessment
Score 24 controls across six security areas and turn gaps into a prioritized local roadmap.
● Browser onlyOpen tool →
Monitoring
Vulnerability Priority Center
Combine NVD severity, CISA KEV evidence and FIRST EPSS probability for one explainable CVE priority.
● Public checkOpen tool →
Web Security
security.txt Builder and Validator
Build an RFC 9116 starter file and validate the live .well-known publication on a public domain.
● Public checkOpen tool →
Web Security
Unicode Domain Lookalike Analyzer
Inspect mixed scripts, Punycode, invisible characters and common cross-script lookalikes locally.
● Browser onlyOpen tool →
Developer
OpenAPI and Swagger Security Auditor
Review API contracts locally for unprotected operations, missing schemes and sensitive endpoint signals.
● Browser onlyOpen tool →
Monitoring
Threat Modeling Wizard
Turn system scope, assets and trust boundaries into prioritized threats, mitigations and validation tasks.
● Browser onlyOpen tool →
Monitoring
Interactive Cyber Incident Simulations
Practice critical decisions in four guided scenarios and measure response quality locally.
● Browser onlyOpen tool →
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SECURITY NOTE
Use scanning tools responsibly.
Only test systems you own or are explicitly authorized to assess. Results are informational and do not replace a professional security review.
Read our security approach →