(low latency matters for live preview).
| | Unblocker Counter | | :--- | :--- | | DNS Filtering (blocks codesandbox.io ) | Use IP address directly or VPN | | TLS SNI Inspection (sees the domain in the HTTPS handshake) | Use ECH (Encrypted Client Hello) or a forwarding proxy | | WebSocket Filtering (blocks wss:// connections) | Fallback to HTTP long-polling (rare) | | Category Blocking ("Web Tools") | Self-host a mirror on a generic domain like my-cool-project.com | code sandbox unblocker
The most skilled developers don't rely on fragile proxies. They adapt. They learn local development. They build their own infrastructure. Or they advocate for change within their organization. (low latency matters for live preview)
or “This category is blocked (Web Development Tools).” code sandbox unblocker