What are CloudWatch evaluation periods and datapoints to alarm?

The evaluation period is the number of consecutive periods over which data is compared to the threshold. Datapoints to alarm specifies how many of those periods must be breaching before the alarm triggers. For example, 3 out of 5 evaluation periods means 3 of the last 5 data points must exceed the threshold.

Does this tool create alarms in my AWS account?

No. The tool generates alarm configuration JSON or CLI commands that you can copy and execute yourself. It runs entirely in your browser and does not connect to your AWS account.

AWS CloudWatch Alarm Builder

MonitoringAWS

Generate CloudWatch alarm JSON for metrics with thresholds and actions.

CloudWatch Alarm Configuration

Alarm Name

Namespace

Metric Name

Statistic

Period (seconds)

Evaluation Periods

Threshold

Comparison Operator

Alarm Actions (SNS ARNs, comma-separated)

Description (optional)

Generated CloudWatch Alarm

Output will appear here...

About This Tool

The CloudWatch Alarm Builder helps you configure CloudWatch alarm definitions through a guided form interface. You can select metrics, set thresholds, configure evaluation periods, and define alarm actions like SNS notifications or Auto Scaling policies. The tool generates the complete alarm configuration as JSON or CLI commands that you can use with CloudFormation, Terraform, or the AWS CLI, eliminating the need to memorize metric namespaces and statistic options.

When to Use This Tool

•Build alarms for EC2 instance CPU utilization, status checks, and network metrics to detect performance degradation.
•Configure composite alarms that combine multiple metric conditions to reduce alert noise and improve signal quality.
•Create RDS alarms for database CPU, free storage, read/write latency, and connection count thresholds.
•Set up ALB alarms for HTTP 5xx errors, target response time, and unhealthy host count for application monitoring.

Frequently Asked Questions

What are CloudWatch evaluation periods and datapoints to alarm?: The evaluation period is the number of consecutive periods over which data is compared to the threshold. Datapoints to alarm specifies how many of those periods must be breaching before the alarm triggers. For example, 3 out of 5 evaluation periods means 3 of the last 5 data points must exceed the threshold.
Does this tool create alarms in my AWS account?: No. The tool generates alarm configuration JSON or CLI commands that you can copy and execute yourself. It runs entirely in your browser and does not connect to your AWS account.

Disclaimer: This tool runs entirely in your browser. No data is sent to our servers. Always verify outputs before using them in production. AWS, Azure, and GCP are trademarks of their respective owners.