Interactive · UDB's real parser · WebAssembly · runs in your browser

The proto → catalog playground

This runs UDB itself, not an imitation. udb.wasm is the udb-portable crate — the same parser, AST, and deterministic-checksum source the server compiles — built to WebAssembly. Paste a UDB-annotated .proto below and UDB parses it client-side into the exact catalog schema (tables, columns, RLS, per-column data classes) and the same sha-256 manifest checksum the broker would compute.

Now in the browser: beyond parsing, this demo runs UDB's real manifest + bootstrap-DDL generation and the IR → SQL query compiler path used by the backend executors — the exact server source, compiled to WASM. Paste a .proto and you get the catalog schema, the generated DDL, and a live-compiled SELECT, client-side. Honest about scope: only the runtime — gRPC broker, DB drivers, async execution (tokio / sqlx / tonic) — stays server-only.

📐 Your annotated proto input

⌘/Ctrl + Enter

🧱 Parsed catalog schema udb.wasm

Loading UDB (WebAssembly)…

The same ProtoSchema feeds the DDL generation and query compilation you see above (now client-side) — plus migrations, SDKs, and runtime enforcement on the server. See the descriptor-as-contract pipeline →