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Convert between JSON and YAML in either direction. Live preview, parse-error reporting, copy + download.
Utility
Generated on May 23, 2026
Convert between JSON and YAML in either direction. Live preview, parse-error reporting, copy + download.
The JSON ↔ YAML converter translates configuration data between the two most common structured-data formats. JSON (JavaScript Object Notation) is the default for web APIs and config files in most modern stacks; YAML (YAML Ain't Markup Language) is the standard for Kubernetes, Docker Compose, GitHub Actions, Ansible, and many DevOps tools. The conversion is structurally lossless: nested objects, arrays, booleans, nulls, numbers, and strings round-trip cleanly.
Formula
Round-trip: JSON.parse(json) → js-yaml.dump → YAML; js-yaml.load(yaml) → JSON.stringify → JSON. Numbers, booleans, null, arrays, and objects are preserved structurally.If you're moving between JSON and YAML, you're almost certainly working with DevOps config — a Kubernetes manifest someone wrote in YAML that you need to feed into a JSON-only tool, a `package.json` snippet you want to drop into an Ansible playbook, or a Docker Compose file you're trying to script around programmatically. Both formats describe the same shape (nested objects, arrays, strings, numbers, booleans, nulls), so the round-trip is structurally lossless — but the differences in syntax produce a surprising amount of pain. YAML's biggest gotcha is whitespace: a single stray tab, an over-indented child, or a colon without the right spacing breaks the parse, and the error message from kubectl rarely tells you which line. JSON forgives indentation and yells loudly with line numbers when you forget a comma. Paste either side here, get the other instantly, and verify the structure before you commit to a config file that's about to run in production. Powered by js-yaml (YAML 1.2 spec), so the output matches what kubectl, GitHub Actions, and Ansible expect. Comments and YAML-specific features (anchors, aliases, custom tags) don't survive the conversion to JSON — those are YAML-only and get stripped on the way through.
The JSON ↔ YAML converter translates configuration data between the two most common structured-data formats. JSON (JavaScript Object Notation) is the default for web APIs and config files in most modern stacks; YAML (YAML Ain't Markup Language) is the standard for Kubernetes, Docker Compose, GitHub Actions, Ansible, and many DevOps tools. The conversion is structurally lossless: nested objects, arrays, booleans, nulls, numbers, and strings round-trip cleanly. Powered by js-yaml, which implements the YAML 1.2 specification.
Convert a Kubernetes manifest from YAML to JSON for use with `kubectl --output=json`.
Convert a `package.json` snippet to YAML for an Ansible playbook.
Convert a Docker Compose `docker-compose.yml` to JSON for programmatic editing.
Convert GitHub Actions YAML workflows to JSON when integrating with custom automation.
Convert a Postman/Insomnia API response from JSON to YAML for documentation.
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