YAML Tools

Yes, completely free with no account or signup required.

All processing happens in your browser. Your YAML is never uploaded to any server.

Convert YAML to JSON, convert JSON to YAML, and validate YAML syntax.

YAML (YAML Ain't Markup Language) is a human-readable data serialization format widely used for configuration files. It uses indentation instead of brackets and supports comments, making it more readable than JSON or XML.

Paste your YAML into the YAML to JSON tab and click Convert. The tool parses the YAML and outputs equivalent JSON with proper quoting and structure.

Switch to the JSON to YAML tab, paste your JSON, and click Convert. The output uses clean 2-space YAML indentation with no unnecessary quotes.

YAML supports comments, multiline strings, and is more human-readable. JSON is strict, fast to parse, and universally supported. Valid JSON is also valid YAML.

Use the Validate tab. Paste your YAML and the tool reports whether it is valid and shows the location of any parse errors.

YAML uses spaces (never tabs) for indentation to denote nesting. The indentation level must be consistent within each block. 2-space indentation is the most common convention.

Yes. YAML is the standard format for Docker Compose, Kubernetes manifests, GitHub Actions, Ansible playbooks, and many CI/CD tools.

Use a dash and space (- ) for each item on its own line. For example, a list under 'fruits' would have - apple, - banana as indented children. Inline arrays use square brackets: [apple, banana].

TOML is designed specifically for configuration with a simple ini-like structure. YAML is more general and handles complex nested data. TOML is common in Rust and Python projects; YAML dominates in DevOps tooling.