YAML to JSON

Convert YAML to JSON online. Paste or upload. Pretty print option. Download or copy. 100% client-side.

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What This YAML to JSON Tool Offers

This free converter turns YAML into JSON in your browser. Paste or upload YAML and get valid JSON. Choose pretty print with 2 or 4 space indent for readable output. Invalid YAML shows the parser error, line number when available, and a snippet so you can fix the markup. Download or copy the JSON; a link to JSON to YAML is shown when conversion fails. All processing is client-side.

  • YAML 1.2: Parses standard YAML 1.2 (maps, sequences, scalars, multi-line strings). Output is valid JSON.
  • Pretty print: Format the output with 2 or 4 space indent, or output a single line. Indent option is available when pretty print is on.
  • Error details: Invalid or malformed YAML shows the parser message and, when provided, the line number and a snippet of the YAML around the error.
  • Paste or upload: Paste from clipboard or upload a .yaml or .yml file (including drag-and-drop). Clear button resets input and output.

    • Powered by browser APIs and client-side processing.

Why Convert YAML to JSON?

Many APIs and apps expect JSON. Converting YAML to JSON lets you use configs, CI/CD definitions, or Kubernetes-style YAML in JSON-based systems. The mapping is direct: YAML maps become JSON objects, sequences become arrays. All conversion runs in your browser so your data stays private.

Options at a Glance

  • Pretty print: When on, JSON is indented (2 or 4 spaces). When off, output is a single line.
  • Indent: Only when pretty print is on: choose 2 spaces or 4 spaces per level.
  • Download / Copy: Export the .json file or copy to clipboard. Use with our JSON to YAML tool for the reverse.

Frequently Asked Questions

Is my YAML data secure?

Yes. Conversion runs entirely in your browser. Your data never leaves your device and is not sent to any server.

What YAML syntax is supported?

The tool parses YAML 1.2. Common features (maps, sequences, scalars, multi-line strings, anchors) are supported. Output is standard JSON.

What if my YAML is invalid?

You see the parser error message and, when the library provides it, the line number. A snippet of the YAML around the error is shown. A link to JSON to YAML is available for the reverse conversion.

Can I convert YAML from a file?

Yes. Use the file picker or drag-and-drop a .yaml or .yml file onto the input area. The file is read in your browser; nothing is uploaded.