Is Your VPN Leaking? Test In Real Time.
Standard VPN connections frequently leak your real IP address through browser WebRTC STUN requests. NetLeakCheck executes client-side diagnostic queries to audit your privacy, calculate password resilience, and verify cryptographic checksums.
Live Interface & WebRTC Scan
- Probing network adapters...
Browser-Based Privacy & Cryptography Engines
WebRTC & IP Leak Test
Audit your browser for silent WebRTC candidate leaks that bypass commercial VPN tunnels and expose your real home ISP.
Run Deep Leak Test →Password Entropy Auditor
Calculate mathematical Shannon entropy and estimate brute-force cracking times across consumer GPUs and supercomputers.
Audit Entropy →CIDR Subnet Calculator
Instantly compute network addresses, broadcast boundaries, usable host ranges, and wildcard masks for IPv4 subnets.
Calculate Subnet →Cryptographic Hash Generator
Compute native SHA-256, SHA-512, and SHA-384 checksums for strings and binary files offline via the browser Web Crypto API.
Generate Hashes →Secure Passphrase Generator
Generate cryptographically random multi-word passphrases inspired by the EFF Diceware standard for maximum memory retention.
Generate Passphrase →DNS-over-HTTPS Auditor
Query Cloudflare and Google DoH endpoints for A, AAAA, MX, TXT records with instant SPF and DMARC security policy validation.
Query DNS Records →SSL / TLS Certificate Inspector
Inspect certificate chains, track expiry countdowns, analyze SAN domains, and evaluate TLS 1.3 cryptographic strength.
Inspect SSL Certificate →HTTP Security Headers & CSP
Audit HSTS, CSP, X-Frame-Options, and nosniff protection with copy-paste remediation directives for Nginx, Apache, and Cloudflare.
Audit Security Headers →IPv6 CIDR Subnet Calculator
RFC 5952 zero-compression, full 128-bit expansion, assignable host calculations ($2^{128-n}$), and prefix routing boundaries.
Calculate IPv6 Subnet →Top Audited No-Logs VPNs
In-depth 2026 benchmark of verified RAM-only VPN providers with third-party court-tested privacy records.
Compare VPNs 2026 →Audited No-Logs VPN Performance Benchmarks (2026)
| Provider | Jurisdiction | Server Architecture | Independent Audit | WebRTC Kill Switch | Action |
|---|---|---|---|---|---|
|
Surfshark VPN
★★★★★ Best Value & Unlimited Devices
|
Netherlands (EU Privacy) | 100% RAM-Only (Nexus) | Deloitte Audited | ✓ Integrated | Review & Deal |
|
NordVPN
★★★★★ Industry Standard Security
|
Panama (Safe Haven) | RAM-Only Diskless | PwC & Deloitte (3x) | ✓ App-Kill Switch | Explore Nord |
|
Proton VPN
★★★★★ Open-Source & Swiss Laws
|
Switzerland | Secure Core Architecture | Securitum Audited | ✓ Hardened | Swiss Vault |
Network Protocols & Security Engineering Handbooks
Peer-reviewed architectural breakdowns, RFC implementations, and browser defense manuals.