PHP Supabase RLS Policy Generator

How to write secure Supabase Row Level Security (RLS) policies?

Writing raw PostgreSQL Row Level Security (RLS) policies is arguably the most error-prone aspect of backend development. A single misconfigured USING or WITH CHECK clause can expose your entire database to anonymous users. The DevUtility Hub Supabase RLS Generator provides enterprise-grade, instantly deployable SQL policy templates for the most common architecture patterns.

Why Use a Generator for RLS?

• Prevent Data Leaks: It’s incredibly easy to accidentally allow an UPDATE without checking the user's ID, allowing a malicious actor to overwrite other users' data.
• Standardized Patterns: Using battle-tested templates for "User Profiles", "Public Read/Auth Write", and "Tenant Isolation" ensures you are adhering to strict security standards.
• Context Variables: Supabase exposes the auth.uid() and auth.jwt() functions. Remembering exactly how to cast native JWT claims is tedious. We build this into the syntax automatically.

The 4 Core RLS Architecture Patterns

• Public Read, Auth Write: Ideal for blogging and comment systems. Everyone can view public posts, but only the authenticated author can mutate the data.
• Secure User Profiles: A strict 1:1 mapping where a user can only query and mutate rows where the user_id column perfectly matches their auth.uid().
• SaaS Tenant Isolation: For B2B applications where users belong to organizations. This template leverages custom JWT claims to scope all row access strictly to the user's tenant_id.
• Admin / Superuser Only: Block all access except for users possessing a custom role claim on their JWT evaluated to 'admin'.

Take the guesswork out of Postgres security. Select your pattern, type your table name, and deploy secure policies into your Supabase SQL editor in seconds.