Scan any URL. Stay secure.
Detect leaked secrets, misconfigured headers, cookie issues, and 100+ security vulnerabilities in seconds. Zero storage. Complete privacy.
Every Day, Secrets Slip Through
A single leaked API key can cost thousands. Misconfigured headers expose your site to XSS. Insecure cookies leak sessions. Most developers don't know until it's too late.
The Problem
Your frontend JavaScript is shipped to every user. Hidden in that bundle might be a Stripe secret, an AWS key, or a database connection string. Missing security headers leave you vulnerable to XSS, clickjacking, and data leakage. Attackers automate scanning millions of sites daily, looking for exactly these mistakes.
The Reality
Traditional security tools are slow, expensive, and require deployment. By the time you run a scan, the damage might already be done. You need to catch issues before they ship. And you need to understand what you're actually running — every framework, server, and service.
The Sentinel Solution
Sentinel scans any URL in seconds. No deployment needed. No accounts required. Just paste your URL and get an instant security report.
- ✓50+ secret patterns: Stripe, AWS, GitHub, OpenAI, JWT, DB URLs
- ✓12 security headers: CSP, HSTS, COOP, CORP, and more
- ✓Cookie analysis: Secure, HttpOnly, SameSite flags
- ✓Mixed content detection: HTTP resources on HTTPS
- ✓GraphQL introspection: Exposed endpoint detection
- ✓Tech fingerprinting: 100+ frameworks & services
See It In Action
Scan any URL and get instant results with 100+ security checks
Security Headers
12 headers checked
Secrets Detection
50+ patterns
Cookie Security
Secure, HttpOnly, SameSite
Mixed Content
HTTP on HTTPS pages
Trusted By Developers
Protecting applications worldwide with 100+ security checks
Sentinel caught a leaked Stripe key in our production bundle before we deployed. Saved us thousands in potential charges.
The fastest security scan I've used. It detected missing HSTS and cookie issues that our traditional scanner missed.
Finally, a tool that doesn't require a 50-page signup. Just scan and go. The tech fingerprinting is incredibly accurate.
100+ Security Checks
Comprehensive security scanning that goes far beyond traditional tools
50+ Secret Patterns
Detects Stripe, AWS, GitHub, OpenAI, JWT, private keys, database URLs, Slack/Discord webhooks, NPM tokens, and more.
12 Security Headers
Analyzes CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, COOP, CORP, COEP.
Cookie Security
Checks Secure, HttpOnly, SameSite flags on all cookies. Identifies session cookies missing protection.
Mixed Content
Finds HTTP resources loaded on HTTPS pages — scripts, stylesheets, images, iframes, and AJAX calls.
GraphQL Security
Detects exposed GraphQL endpoints with introspection enabled. Prevents schema exposure attacks.
100+ Tech Signatures
Identifies frontend frameworks, backend servers, CDNs, databases, ORMs, analytics, payments, and more.
| Feature | Sentinel | Traditional Tools |
|---|---|---|
| Secrets Detection (50+ patterns) | — | |
| Security Headers (12 checks) | ||
| Cookie Security Analysis | — | |
| Mixed Content Scanning | — | |
| GraphQL Introspection Check | — | |
| Tech Stack Fingerprinting | — | |
| No Signup Required | — | |
| Zero Data Storage | — | |
| Instant Results | — |
Ready To Secure Your Application?
Get instant security analysis with 100+ checks. Detect secrets, headers, cookies, JavaScript issues, and more.