gRPC over WebRTC DataChannels — stub generator

Upload or edit .proto schemas, pick languages, download a zip of generated gRPC-over-DataChannel stubs plus the dependency-free runtimes. The generated JavaScript client runs in the browser on the native RTCDataChannel; other languages run natively or in the browser as Wasm. Everything — schema compilation included — runs in this page; no server sees your schemas, and there is no grpc-web proxy anywhere in the path.

New here? Run your first RPC

One click: this page generates the Echo client from the bundled schema, serves it in-page over a loopback DataChannel pair (the same transport a real RTCDataChannel plugs into), and runs unary + streaming calls. No server, nothing leaves the tab.

Takes a few seconds the first time. 

  

  
Next step: replace the loopback pair with two
     RTCPeerConnections (or a native peer) — Channel
     and the generated client do not change. See
     QUICKSTART.





  

    

      
      
      
    

    

    

      
      
    

    
loading compiler…

    
Google Drive

    
Save and open .proto schemas in your own
       Google Drive (drive.file scope: this app only sees
       files it created or you open here). Tokens stay in this tab.

    

      
      
      
      
    

    
  

  

    
Services

    
(compile a schema to see its services)

    
Languages

    

    
    
    

    
JS bundle preview

    
(generate with JavaScript selected to preview the generated message bundle here)

    
Stubs land in gen/<lang>/, the matching runtime in
       runtime/<lang>/, schemas in proto/.
       Generated message classes (<base>_pb) are included — see the zip's README.

  





  

    
    
    
    
    
  

  

    

    
(pick a language)