Developer Tools
Small, focused debugging tools for the Next.js + Supabase + PostgreSQL stack. Everything runs in your browser — nothing you paste is sent anywhere.
Supabase RLS Playground
A real PostgreSQL engine compiled to WebAssembly, running in your tab. Paste your schema and policies, then watch one query return different rows for anon, two signed-in users and service_role.
Not a pattern matcher — it executes your SQL and reports what Postgres actually returned.
Open the playgroundNext.js Build Error Decoder
Paste your failing next build / next dev output — the decoder matches 13+ real failure signatures and gives you the fix.
Open the toolNext.js Env Leak Checker
Paste your .env — catch secrets leaking to the browser via NEXT_PUBLIC_, service_role keys in client bundles, and syntax pitfalls.
Open the toolSupabase RLS Policy Debugger
Paste your RLS error or CREATE POLICY statement — get the failing clause, the reason, and the corrected SQL.
Open the tool