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YAML to JSON Converter — Online YAML Parser

YAML is the language of configuration files — Kubernetes, Docker Compose, GitHub Actions, Ansible all use it. But APIs speak JSON. Convert between both formats instantly with syntax validation and error highlighting.

What is YAML?

YAML (YAML Ain't Markup Language) is a human-readable data serialization format that uses indentation to represent structure. It's more readable than JSON — no braces, quotes are optional for strings, and comments are supported. It's the standard format for DevOps configuration files.

Why Convert Between YAML and JSON?

Tools like Kubernetes, Helm, and GitHub Actions use YAML. REST APIs and JavaScript apps use JSON. You often need to convert between them: turning a YAML config into JSON for an API call, or converting a JSON API response into YAML for a config template.

Key Benefits

  • Convert YAML → JSON and JSON → YAML
  • Live syntax error highlighting
  • Handles nested objects and arrays
  • Formatted output with proper indentation
  • 100% client-side — nothing sent to server

How to Use YAML/JSON Converter

  1. Paste your YAML or JSON in the input
  2. Select conversion direction
  3. Converted output appears instantly
  4. Fix any syntax errors shown in the error panel
  5. Copy the result

Example Use Case

You have a Kubernetes deployment manifest in YAML. A tool you're using only accepts JSON input. Paste the YAML → convert to JSON → paste into the tool. Or reverse: take a JSON API schema and convert to YAML for a Helm chart values file.

Tips

  • YAML is indentation-sensitive — use consistent 2 or 4 spaces (not tabs)
  • YAML supports comments (#), JSON does not
  • YAML strings don't need quotes unless they contain special characters
  • Boolean values in YAML: true/false (lowercase) — not True or TRUE

Ready to try it?

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Frequently Asked Questions

Yes, completely free.

No. All conversion happens locally in your browser.

Yes. YAML is a superset of JSON — valid JSON is also valid YAML.

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