Online YAML syntax validator

The tool validates YAML documents by parsing input text against YAML 1.2 syntax rules. It highlights syntax errors, indentation issues, and duplicate keys, returning precise location information. It supports multi-document streams and reports a clear status with error details. Conceptually, validation proceeds in parsing, structural checks, and error synthesis, ensuring the YAML is well-formed before it reaches runtime. Beneficiaries include developers, platform engineers, and QA teams who rely on YAML for configuration. Unique value lies in precise line/column reporting, snippet context, multi-document support, and an option to enforce stricter behavior when needed. Core features include real-time parsing feedback, duplicate-key detection, and a compact, machine-friendly error model. Use cases cover Kubernetes manifests, CI workflow files, Docker Compose configurations, and general configuration files. This tool integrates smoothly into CI/CD pipelines, code editors, and command-line workflows, enabling early detection and faster iteration.