Service Worker Debugger
Analyze service worker registration diagnostics to catch scope, security, MIME, status, and cache-policy issues before they impact your PWA rollout.
Paste service worker registration diagnostics to detect blocking errors in scope, security context, response headers, and update propagation policy.
Why Use This Service Worker Debugger?
Registration Context Parsing
Analyzes script URL, page URL, scope, secure context, and status code for registration readiness.
Scope and Header Validation
Flags scope hierarchy issues and Service-Worker-Allowed mismatches before deployment.
Update Propagation Insights
Checks cache policy patterns that often cause delayed service worker updates in production.
Private Browser Execution
All analysis runs locally in your browser; no service worker diagnostics are uploaded.
Common Use Cases for Service Worker Debugger
Registration Failure Triage
Identify why registration fails due to insecure context, invalid URLs, scope errors, or script response issues.
Scope Boundary Verification
Verify scope path and Service-Worker-Allowed behavior before shipping new app-shell routing.
Update Delay Investigation
Audit cache-control settings that can slow update propagation and keep stale workers active.
Security Header Hardening
Check script MIME expectations and X-Content-Type-Options patterns to avoid subtle runtime breakage.
Pre-Release PWA Smoke Test
Run a quick static health check on service worker context before production deployment.
Validation Loop Scenario Testing
Exercise pass, fail, auto-fix, and retry-limit scenarios with repeatable diagnostics samples.
How Service Worker Debugging Works
What Gets Evaluated
The debugger parses service worker registration context and response headers to detect scope mismatches, security constraints, MIME-type problems, and cache behaviors that can block or delay updates.
Analysis Pipeline
- Parse: Extract script URL, page URL, scope, status code, and key response headers.
- Validate: Apply same-origin, HTTPS, scope, MIME, and cache-policy checks with severity mapping.
- Prioritize: Generate score, grade, and fix-ready recommendations for fast remediation.
Validation Loop Friendly
This tool recognizes pass, fail, auto-fix, and retry-limit markers for iterative validation-loop testing.
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Frequently Asked Questions - Service Worker Debugger
It analyzes service worker registration context, script response headers, scope configuration, and caching policy signals that can cause failures or update delays.
You can paste key:value lines or JSON payload containing scriptUrl, pageUrl, scope, secureContext, status, and responseHeaders.
Yes. It flags cache-control patterns likely to keep stale workers alive and recommends safer update-friendly policies.
No. This is a static debugger for your diagnostics input and does not register scripts against live origins.
Yes. It recognizes success, failure, auto-fix, and retry-limit markers for strict loop testing workflows.
No. Processing happens fully in-browser and your diagnostics remain local.