</> DevToolHub

YAML to JSON Converter

Convert YAML to JSON format online. Transform configuration files and data from YAML to standard JSON.

Your data never leaves your browser

How to Use

  1. 1

    Paste your YAML

    Enter or paste YAML data in the input field. Use proper indentation (2 spaces recommended).

  2. 2

    Click Transform

    The tool parses the YAML and converts it to formatted JSON.

  3. 3

    Copy or download

    Use Copy to copy the JSON to your clipboard, or Download to save it as a .json file.

What is YAML to JSON Converter?

YAML (YAML Ain't Markup Language) is the go-to data serialization format for configuration files across the DevOps ecosystem. From Kubernetes manifests and Docker Compose definitions to Ansible playbooks and CI/CD pipelines, YAML's indentation-based syntax makes config files easy to read and maintain. JSON (JavaScript Object Notation), on the other hand, is the universal format for web APIs, REST payloads, and application data interchange.

When you need to convert YAML to JSON, the most common reason is to feed configuration data into an API or a tool that only accepts JSON. A yaml to json converter is also invaluable for debugging: converting a complex Kubernetes or Docker Compose file to JSON lets you validate its structure with any standard JSON validator and quickly spot nesting errors, type mismatches, or missing keys that are hard to catch in whitespace-sensitive YAML.

This free yaml to json converter online parses your YAML input — including key-value pairs, nested objects via indentation, arrays with dash notation, inline collections, and all standard data types — and produces cleanly formatted JSON output. You can convert yaml to json directly in your browser with no server round-trip and no data leaving your machine, making it safe for sensitive configuration data.

If you need the reverse operation, use our JSON to YAML Converter. For deeper inspection of the resulting JSON, try the JSON Tree Viewer or run the output through the JSON Formatter. Together these tools form a complete yaml json online toolkit for anyone working with modern infrastructure configuration.

FAQ

What YAML features are supported?
This tool supports key-value pairs, nested objects (via indentation), arrays (dash notation and inline), strings, numbers, booleans (true/false), and null values. Advanced features like anchors, aliases, and multi-document streams are not supported.
Why is indentation important in YAML?
YAML uses indentation (spaces, not tabs) to represent nesting. Incorrect indentation will cause parsing errors or unexpected results. Use consistent 2-space indentation for best results.
Can I convert JSON back to YAML?
Yes! Use our JSON to YAML Converter tool for the reverse conversion.
Why convert YAML to JSON?
Common reasons include using config data in REST APIs that require JSON, validating YAML structure by parsing it into a strict format, feeding configuration into tools that only accept JSON input, and debugging CI/CD pipelines where a YAML syntax error is easier to locate once the data is rendered as JSON.
What YAML features are lost when converting to JSON?
JSON has no equivalent for several YAML features, so they are dropped during conversion: comments (lines starting with #), multi-line string indicators (| for literal blocks and > for folded blocks), anchors and aliases (& and * references), and custom tags. The actual data values are preserved, but the formatting metadata is lost.

Related Articles

JSON vs YAML: Differences, Conversion, and When to Use Each

How to Read and Debug JSON: Tree View vs Raw Text

Related Tools

JSON to YAML Converter

Convert JSON data to YAML format online. Clean, readable YAML output from any valid JSON input.

JSON Validator

Validate your JSON data instantly. Check for syntax errors, see detailed error messages, and get document statistics.

JSON Formatter & Beautifier

Format, beautify, and pretty-print JSON data online. Choose indentation style, copy or download the result. Free, fast, and private.

JSON Tree Viewer

Visualize JSON data as an interactive, collapsible tree. Explore nested objects and arrays with ease.

JSON to CSV Converter

Convert JSON arrays of objects to CSV format online. Automatically detects columns, handles nested data, and escapes special characters.

Cron Expression Parser & Generator

Parse, validate, and generate cron expressions online. See human-readable schedule descriptions and next execution times instantly.