// Free AWS Developer Tool
Stop hunting AWS documentation for syntax. Build S3, EC2, IAM, Lambda, RDS, ECS, and CloudFormation commands visually—select service, subcommand, and flags to get ready-to-run commands instantly. Copy and paste directly into your terminal. No AWS credentials required.
AWS CLI command syntax is complex and spread across hundreds of pages of documentation. Developers waste time memorizing flags, looking up parameter names, and cross-referencing multiple docs just to run a single command. This generator solves that problem.
Eliminate memorization. Instead of memorizing AWS CLI syntax for each service, select your service and subcommand visually. The tool builds the command for you—no manual typing of complex flags.
No credentials required. This is a pure syntax builder. You generate the command structure here, then run it in your terminal with your actual AWS credentials. Perfect for learning, interviews, and testing before production.
Copy-paste ready. Select options → click "Build Command" → click "Copy" → paste into your terminal. Four steps. That's it. No setup, no installation, no configuration.
Learn as you build. Every command has a description. See what each flag does before running it. Understand the syntax while you generate commands, not after.
Supports major AWS services. S3, EC2, IAM, Lambda, RDS, ECS, CloudFormation, and STS are all included with the most common subcommands and parameters.
S3 → cp command to copy a file from your local machine to an S3 bucket. Specify source and destination paths.EC2 → describe-instances to list all running instances. Add filters to narrow down by region, state, or tags.IAM → create-user to add a new IAM user. Optionally assign a path and tags for organization.Lambda → invoke to run a function. Provide function name and optional JSON payload as input.RDS → start-db-instance or stop-db-instance to manage database instances without the AWS Console.ECS → update-service to change desired task count or force a new deployment of your containerized service.The --query flag uses JMESPath syntax to filter AWS API responses. Instead of getting all data, extract only what you need:
Example: List only EC2 instance IDs and states
aws ec2 describe-instances --query 'Reservations[*].Instances[*].[InstanceId,State.Name]' --output table
Example: List all S3 bucket names
aws s3api list-buckets --query 'Buckets[*].Name' --output text
Why use --query? Reduces output noise, enables shell piping, makes automation easier. The output goes directly into scripts or further processing.
Store multiple AWS credentials and switch between accounts without reconfiguration:
Configure a named profile
aws configure --profile myprofile
This creates a profile named "myprofile" with separate credentials and region settings.
Use the profile in commands
aws s3 ls --profile myprofile
Any AWS CLI command works with --profile profilename.
Set a default profile
export AWS_PROFILE=myprofile
Now all commands use "myprofile" by default without typing --profile each time.
Many EC2 commands support --dry-run to validate that you have permissions before actually running the command:
Example: Test if you can terminate instances
aws ec2 terminate-instances --instance-ids i-xxx --dry-run
If it succeeds, you have permission. If it fails with UnauthorizedOperation, you need more IAM permissions.
Why use dry-run? Prevents accidental resource deletion. Test destructive operations safely before deploying them in production.
Control how AWS API responses appear:
JSON format (default)
aws ec2 describe-instances --output json
Full structured output for parsing in scripts.
Table format (human-readable)
aws ec2 describe-instances --output table
Pretty-printed output perfect for reading in the terminal.
Text format (for piping)
aws s3api list-buckets --output text
Tab-separated values, easy to pipe to grep, awk, cut, or other Unix tools.
Commands that return many results are paginated by default. Control pagination with flags:
Get all results at once
aws s3api list-objects-v2 --bucket mybucket --no-paginate
Control page size
aws ec2 describe-instances --page-size 10 --max-items 50
Fetch 50 items total, requesting 10 per page.
Manual pagination
Use --starting-token with the NextToken from previous results to fetch the next page.
NoCredentialsError or Unable to locate credentials
You haven't configured AWS credentials. Run aws configure to set Access Key ID, Secret Access Key, region, and output format. Credentials are stored in ~/.aws/credentials.
UnauthorizedOperation
Your AWS account or IAM user doesn't have permission for this action. Check your IAM policy. Use --dry-run first to test permissions.
InvalidParameterValue
A flag value is invalid. Check the command syntax. This generator helps by showing required vs. optional fields.
An error occurred (InvalidBucket.NotFound)
The S3 bucket doesn't exist or you don't have access. Verify bucket name and region.
Before running commands, verify which AWS account and role you're using:
Check current identity
aws sts get-caller-identity
Returns Account ID, User ARN, and UserId. Confirms you're logged in and using the right account.
List configured profiles
cat ~/.aws/credentials
Shows all stored AWS credentials and profiles.
Check region setting
echo $AWS_DEFAULT_REGION
Shows the default region. Override with --region us-east-1 in any command.
pip install awscli. Then run aws configure to set up credentials. After that, you can use commands like aws s3 ls, aws ec2 describe-instances, or aws lambda list-functions to manage AWS resources.pip install awscli. Configure: Run aws configure and enter your AWS Access Key ID, Secret Access Key, default region (e.g., us-east-1), and output format (json is default). Your credentials are stored securely in ~/.aws/credentials. Verify: Run aws sts get-caller-identity to confirm the configuration worked.--query uses JMESPath syntax to extract specific fields from AWS API responses. Example: aws ec2 describe-instances --query 'Reservations[*].Instances[*].[InstanceId,State.Name]' --output table lists only instance IDs and states. Another example: aws s3api list-buckets --query 'Buckets[*].Name' --output text lists only bucket names. Use --output text or --output json to control the final format for piping or automation.