Source Map Leak Checker
Paste a JavaScript source map and detect sourcesContent exposure, private paths, token-like strings and safer production deployment steps.
When to use this
Use this before publishing production sourcemaps. The checker focuses on exposure risk rather than bundle-size visualization.
SourceMap Leak Inspector reference guide
This utility is a local browser-side preflight checker. It helps developers review pasted snippets, understand likely risk areas, and prepare a safer verification checklist before using authoritative command-line, server-side, CI or vendor-specific tools.
The workflow is intentionally simple: paste a representative sample, review the prioritized findings, inspect the generated output, then move the confirmed changes into your real repository or deployment pipeline. This keeps the site useful for quick searches while avoiding account access, uploads, storage or background processing.
Common review sessions include pull request triage, production readiness checks, incident follow-up, migration planning, onboarding notes and one-off debugging when official documentation is too broad for the specific snippet in front of you.
- Input stays in the browser runtime for the interactive analysis.
- Findings are heuristic and should be treated as review guidance.
- Do not paste production secrets, private credentials, regulated personal data or proprietary code.
- Use the generated output as a checklist for a more formal review.
For stronger assurance, run the official verifier or linter for the technology after this first pass. The value of this page is speed, explanation and repeatable review language; the final decision should still be made in the system that owns your build, authentication, observability or security policy.