DBX
Security Engine v4.2.0-stable
99.9% Audit Accuracy

Supabase JWT Debugging Infrastructure

Supabase JWT Decoder & Auth Debugger

Decode and inspect Supabase JSON Web Tokens (JWT) safely in your browser. Identify Auth vulnerabilities and misconfigurations.

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Securing databases for engineers from

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Market Comparison

Why industry leaders choose DBX Deterministic Audits

FeatureDBX EngineManual AuditLegacy Scanners
Deterministic Path Analysis
Zero-Credential Architecture
Real-time Attack Path Graph
Automatic RLS Validation
Instant Compliance Proof
Copy-Paste Remediation

Technical Deep Dive

In a Supabase application, the JSON Web Token (JWT) is the key to your users' identities. If it's misconfigured, your RLS policies might fail entirely. Our JWT Decoder not only decodes the Base64 payloads but analyzes the specific claims. It alerts you if you accidentally leaked a 'service_role' token to the client, warns you about sensitive authorization flags stored improperly in user_metadata, and checks for dangerous expiration lengths—all while keeping your token entirely within your browser.

100% client-side decoding (zero trust)
Supabase-specific insights
Instant payload visualization
Actionable security warnings

Primary Vulnerability Vectors

  • 01
    Service role token leakage
  • 02
    User metadata tampering vulnerabilities
  • 03
    Token expiration mismanagement

Audit Checklist

Detect client-side 'service_role' tokens
Warn on authorization flags in 'user_metadata'
Identify dangerously long expiration times
Check for missing subject (sub) claims
Inspect custom claims in app_metadata

How it works

High-integrity schema introspection

Introspect

Run a read-only script to extract your database catalog. No data ever leaves your machine.

Simulate

Our engine executes billion-path simulations to find logical RLS bypasses.

Remediate

Receive copy-paste SQL fixes for every high-risk vulnerability discovered.

Ready to secure your Supabase instance?

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Open JWT Decoder