Supabase Launches RLS Tester in Feature Preview for Policy Debugging.

Supabase announced on LinkedIn that its new RLS tester is now available in feature preview. The tool allows developers to test which Row Level Security policies apply to specific queries directly within the Supabase dashboard, addressing a long-standing debugging challenge for teams building secure applications on Postgres.

Row Level Security is a Postgres feature that controls which rows users can access in a database table. While powerful, RLS policies can be difficult to debug when queries return unexpected results. Until now, developers typically had to manually inspect policy definitions, run test queries, or add logging to determine which policies were firing.

The RLS tester provides visibility into policy execution without requiring custom debugging code. Developers can now see exactly which policies are being evaluated for a given query and understand why certain rows are included or excluded from results. This makes it faster to validate access rules during development and catch misconfigurations before they reach production.

The feature is currently in preview and must be enabled manually. Users can activate it from the feature preview section of the Supabase dashboard. No changes to existing database configuration or application code are required.

This update continues Supabase's focus on improving developer experience for teams working with Postgres. Recent releases have included keyboard shortcuts for faster dashboard navigation and performance improvements to the table editor for large databases. The company has also tightened default security settings, requiring explicit permission grants for new tables starting May 30.

The RLS tester fits into a larger effort to make database security more approachable. Supabase has positioned itself as an open-source alternative to Firebase, with a focus on giving developers full control over their Postgres infrastructure while reducing complexity.

For teams using Supabase, the RLS tester removes friction from a common workflow. Instead of switching between the dashboard, SQL editor, and application logs to debug access issues, developers can now validate policy behavior in a single interface. This is particularly useful when onboarding new team members or refactoring authentication logic.

The feature is opt-in during the preview period, which suggests Supabase is gathering feedback before rolling it out more broadly. Developers who enable the tester can report issues or suggest improvements while the feature is still being refined.

The RLS tester is available now to all Supabase users through the feature preview settings in the dashboard. More details are available on the official Supabase blog.