YAML-JSON Converter
Convert between YAML and JSON formats instantly in your browser. Auto-detects input format, so just paste and convert. Ideal for config files and API responses.
Last updated:
How to Use
Expand how to useCollapse how to use
- 1
Input
Paste YAML or JSON into the input area. The format is automatically detected.
- 2
Convert
Click the "Convert to JSON" or "Convert to YAML" button.
- 3
Copy
Copy the conversion result to the clipboard using the copy button.
Input
Output
About YAML-JSON Converter
YAML-JSON Converter instantly converts between YAML and JSON with automatic format detection — just paste your content and the tool determines whether it's YAML or JSON. It's ideal for converting Kubernetes manifests, Helm chart values, GitHub Actions workflows, Docker Compose files, and Ansible playbooks between formats. YAML syntax errors are detected with line number display to help you locate issues quickly. Customizable indentation (2 spaces, 4 spaces, or tabs) lets you match your project's style, and a swap feature lets you quickly reverse input and output.
Key Features
- Auto-detection (automatically determines input format)
- Bidirectional conversion (YAML→JSON and JSON→YAML)
- Customizable indentation (2 spaces/4 spaces/tabs)
- YAML syntax error detection (displays error line number)
- Swap feature to switch input and output
Common Use Cases
- Convert Kubernetes manifests or Helm chart values to JSON
- Transform GitHub Actions or CircleCI YAML to JSON for scripting
- Convert Docker Compose files for inspection or tooling
- Turn JSON API responses into readable YAML for documentation
- Migrate AWS CloudFormation templates between YAML and JSON
Frequently Asked Questions
What's the difference between YAML and JSON?
YAML is highly readable with indentation-based structure, supporting comments. JSON is a stricter format that's easier for programs to parse. While YAML is often used for configuration files, JSON is standard for APIs and data exchange.
Are YAML comments preserved?
No. Since JSON doesn't support comments, YAML comments are lost during conversion. If comment preservation is important, keep the original YAML file separately.
What causes conversion errors?
Common causes include incorrect YAML indentation, inconsistent mixed tabs/spaces, incorrect quoting, and invalid special characters. Check the error line number and compare syntax.
What data types can be converted?
Objects and arrays. Primitive values only (strings, numbers, etc.) cannot be converted. Also, YAML-specific features like anchors and aliases require special handling.
Is my input data sent to a server?
No. Conversion is handled locally by the js-yaml library running in your browser. Configuration files containing environment variables, secrets references, or internal service names are never transmitted.