Online VPN Diagnostics, Key Decoders & Builders
Test your connection for TSPU 64KB packet freeze, IP/DNS/WebRTC leaks, inspect any VLESS/VMess/Trojan/Shadowsocks URI, or generate uncensorable CDN subscription links right in your browser.
1. TSPU 64KB Freeze & 24-Service Availability Scanner
Automatically tests reachability of YouTube, Discord, Telegram, ChatGPT, Claude, Gemini, and probes global cloud edges (Cloudflare, Hetzner, DigitalOcean, OVH, Fastly) for 64KB TCP packet freeze.
2. Multi-Checker IP Leak, EDNS Leak & WebRTC Test
Queries 5 global IP checkers from your browser to detect partial split-tunnel leaks, discovers active DNS resolvers via random EDNS subdomains, and inspects WebRTC STUN candidates.
3. VPN Key Decoder & Security Analyzer
Decode vless://, vmess://, trojan://, ss://, hy2://, and tg:// links, verify TLS/Reality security parameters, check SNI whitelist compatibility, and generate QR codes.
4. Protocol Survival Telemetry, CDN Mirrors & LLM Feeds
Explore live Xray-core verification metrics from our Russia (Kemerovo) and US probes, copy uncensorable jsDelivr/Codeberg subscription URLs, or access /llms-full.txt.
Frequently Asked Questions
Troubleshooting, protocols, and client setup guidance
Do all diagnostic tools on this page run locally in my browser? ▼
Yes. The TSPU & 24-service scanner (/en/proverka/), the IP/DNS/WebRTC leak detector, the VPN URI decoder (/en/tools/key-checker/), and the RTT ping tester execute 100% client-side in your browser with zero logging.
Why use the Uncensorable CDN Subscription Builder? ▼
If your ISP blocks access to primary VPN domains, our CDN Subscription Builder generates direct links hosted on jsDelivr CDN (cdn.jsdelivr.net), GitHub Raw, or Codeberg EU that update automatically every 30 minutes.