Hub YAML ↔ JSON Converter
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YAML ↔ JSON Converter

Convert between YAML and JSON instantly as you type. Real-time conversion, copy buttons, and clear error messages.

YAML
JSON
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How to use
  1. Paste your YAML into the top pane — the equivalent JSON appears in the bottom pane as you type.
  2. To go the other direction, paste JSON below and the formatted YAML appears above (or use the swap button).
  3. Syntax errors show below the input with the exact line. Click Copy on either pane to grab the result.
FAQ

YAML (YAML Ain't Markup Language) is a human-readable data serialisation format widely used for configuration files in Docker, Kubernetes, GitHub Actions, Ansible, and many frameworks. It uses indentation to represent nested structures.

Use YAML for config files where human readability matters — it supports comments and is less verbose. Use JSON for APIs and data interchange where strict parsing, speed, and wide language support matter.

Common causes: tabs instead of spaces for indentation, missing colons after keys, unquoted special characters (colons, hashes) in values, or incorrect list syntax. The error below the input pinpoints the line and cause.