YAML to JSON Converter — Kubernetes & DevOps Ready
Convert YAML (YAML Ain't Markup Language) to JSON format instantly with our free browser-based converter. Paste your YAML configuration and get properly formatted JSON output.
Perfect for Kubernetes manifests, Docker Compose files, CI/CD pipelines, and any DevOps workflow where you need to switch between YAML and JSON formats. All conversion happens locally in your browser — your configuration data never touches any server.
The everyday use is feeding a config file to something that only speaks JSON — a JSON Schema validator, a Terraform variable file, an API that takes a manifest as a request body, or a script whose parser is json.loads. Anchors and aliases are resolved rather than passed through, multi-document YAML is handled, and comments are dropped because JSON has nowhere to put them. Syntax errors are reported with the line number, which matters in YAML more than in most formats: a single misplaced space is the difference between a valid file and an unparseable one.
How to use YAML to JSON
- Paste or type valid YAML into the input pane.
- Review the formatting options if needed.
- Click Convert to transform the YAML into correct JSON syntax.
- Copy the result to your clipboard or download it.
Features
- Real-time YAML to JSON conversion — Get JSON from your YAML instantly.
- YAML syntax validation with error highlighting — Built-in diagnostics for malformed YAML.
- Pretty-print or minified JSON output — Format the output as needed.
- Support for multi-document YAML — A stream of --- separated documents becomes a JSON array, one item per document.
- Copy or download JSON result — Easily save your converted output.
- 100% client-side — Configs never leave your device.
Frequently Asked Questions
What is the difference between YAML and JSON?
Both are data serialization formats. YAML uses indentation for structure and is more human-readable. JSON uses braces and brackets and is preferred by APIs. They can represent the same data and are interconvertible.
Can I convert Kubernetes YAML to JSON?
Yes. Our converter handles any valid YAML including Kubernetes manifests, Helm charts, and Docker Compose files. Paste your YAML and get JSON instantly.
Does it validate YAML syntax?
Yes. If your YAML has syntax errors (wrong indentation, invalid characters), the converter highlights the error with line number and description so you can fix it.
What happens to my comments?
They are dropped, because JSON has no comment syntax. If the comments are documentation you need to keep, keep the YAML as the source of truth and treat the JSON as generated output rather than editing the JSON afterwards.
Are anchors and aliases expanded?
Yes. YAML anchors (&name) and aliases (*name) are resolved into their full values, since JSON has no way to reference a node. This means a compact YAML file with shared blocks can produce noticeably larger JSON, which is expected rather than a bug.