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SSL Stripping & HSTS Preload Security Auditor (2026)

Audit HTTP Strict Transport Security (HSTS) deployment, test HSTS preload eligibility, and understand SSL stripping and MITM risks.Documentation & FAQs ↓

SSL Stripping & HSTS Preload Security Auditor — Interactive Console
Runs locally in your browser • Instant output
Eligible for Google Chrome & Firefox HSTS Preload List
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
Ready
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2026 Quick-Reference Cheat Sheet & Benchmark Table: SSL Stripping & HSTS Preload Security Auditor

Quick Answer & 2026 Technical Summary (hsts preload checker)Updated 2026 Standard

SSL Stripping is a Man-In-The-Middle (MITM) attack where an attacker intercepts an initial cleartext HTTP request and strips SSL/TLS, forcing the user to communicate over unencrypted HTTP while the attacker speaks HTTPS to the server. Use this interactive hsts preload checker above to test ssl stripping simulator, hsts security auditor, and http strict transport security header locally in your browser with zero server uploads.

Target Keyword Spec: hsts preload checker | Modules: HSTS Header Validator • Preload Eligibility Audit • SSL Strip MITM Simulator
Primary Focus: hsts preload checker
Core Capability: ssl stripping simulator
Privacy Mode: 100% Client-Side (Zero Upload)
Technical Parameter / ModuleStandard / Keyword SpecArchitecture & Validation RuleOperational Use Case (2026)
HSTS Header Validatorssl stripping simulatorParses Strict-Transport-Security headers for max-age, includeSubDomains, an...Web App Security Audits
Preload Eligibility Audithsts security auditorVerifies official Chromium / Firefox HSTS preload list requirements (315360...HSTS Preload Submission
SSL Strip MITM Simulatorhttp strict transport security headerVisual explanation showing how Moxie Marlinspike's SSLstrip converts HTTPS ...Public Wi-Fi Protection
Execution & Privacy Architecture100% Client-Side WebCrypto / JS Sandbox0 Bytes Sent to External ServersSafe for internal SOC & authorized lab artifacts
NIST SP 800-53 / OWASP AlignmentOWASP ASVS v4.0.3 / NIST CSF 2.0Deterministic Rule & Header VerificationMaps findings to actionable hardening controls
Cryptographic & Entropy StandardSHA-256 / AES-256-GCM / Argon2id≥ 128-bit Effective Security MarginMeets 2026 post-quantum & zero-trust baselines

Step-by-Step Workflow

4 Easy Steps
01Phase 1

Enter Domain Name

Type your website domain (e.g. 'example.com') to test or inspect your HSTS header.

02Phase 2

Verify Header Syntax

Check whether max-age is set to at least 1 year (31,536,000 seconds) with includeSubDomains.

03Phase 3

Review Preload Checklist

Ensure all 4 Chromium preload requirements are met before submitting to the global list.

04Phase 4

Copy Hardened Web Server Config

Copy the verified Strict-Transport-Security header block for your web server.

Real-World Applications

Web App Security Audits

Verify that e-commerce and banking portals are immune to initial-request cleartext downgrade attacks.

HSTS Preload Submission

Ensure your domain configuration passes all criteria before submitting to hstspreload.org.

Public Wi-Fi Protection

Understand why unprotected HTTP redirects allow coffee-shop Wi-Fi attackers to steal session cookies.

Related Editorial GuideWhat is Man in the Middle Attack and How to Prevent it
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