Selector Matcher Tester (label selectors vs labels)

Kubernetes selectors decide which pods a Service or Deployment targets. The Selector Matcher Tester evaluates a selector (equality, inequality, existence and set-based forms) against a set of labels and reports a clear match/no-match verdict per term.

Enter a selector and a label set; the tool shows whether they match.

Everything runs locally; nothing is uploaded.

• All operators - =, !=, existence, in, notin.
• Per-term report - see exactly what matched.
• Verdict - overall match or not.
• Copy / Download / Print - export the report.
• Private - runs entirely in the browser.

1. Enter a selector (e.g. app=nginx,tier in (web,api)).
2. Enter labels as key=value pairs.
3. Click Test for the match report.

app=nginx vs app=nginx -> MATCH.

tier in (web,api) vs tier=api -> MATCH.

app=nginx vs app=other -> no match.

• Confident - verify selectors before deploy.
• Clear - term-by-term output.
• Flexible - all operator forms.
• Private - no network calls.