https://hidekazu-konishi.com/tools/cloudformation_template_linter_tool.html
CloudFormation Template Linter Tool - Client-Side cfn-lint Subset for YAML and JSON Templates |...
Apr 19, 2026 - Free online CloudFormation template linter. Client-side JavaScript implementation of a cfn-lint subset with YAML short-form tag support (!Ref, !Sub, !GetAtt,...
yaml and json