Kubernetes Labels Generator
Generate valid Kubernetes labels following recommended naming conventions, with invalid-character checking.
Fill in common label categories - this tool generates a valid labels block and flags any values that don't meet Kubernetes' character rules.
Labels are how Services and Selectors find the right Pods - see the Kubernetes Selector Builder to build a matching selector for these labels.
What Are Kubernetes Labels?
Labels are key-value pairs attached to Kubernetes objects, used to organize and select subsets of resources - Kubernetes itself recommends a standard set like app.kubernetes.io/name and app.kubernetes.io/version for consistency across tools.
Why Use This Tool?
Label keys and values have specific character rules (alphanumerics, -, _, and ., with a 63-character limit for values) - an invalid label causes kubectl apply to reject the whole manifest. This tool checks your values against those rules.
How to Use It
- Fill in common label values: app name, environment, version, and component.
- Add any custom labels.
- Copy the generated labels block - any invalid values are flagged before you copy.
Limitations
This checks the character-format rules for label keys/values - it does not check whether a specific label is semantically meaningful for your setup beyond following Kubernetes' own recommended label conventions.