Before you start
- Keep a small original sample and decide the required delimiter, schema, or output format.
- Remove credentials and personal data that are not needed for the conversion.
MV ToolsData tool
YAML to JSON and JSON to YAML Converter
Convert YAML to JSON and JSON back to YAML locally in your browser for configs, APIs, and DevOps files.
Convert configuration formats without guessing intent
Parse a small sample first, then verify data types, indentation-sensitive structure, and quoted strings before replacing a configuration file.
- Runs locally in the browser with a 2 MB input limit; choose 2 or 4 spaces for JSON or YAML output.
- Optional key sorting works recursively on ordinary objects and can change human-facing order, so use it only when stable ordering is wanted.
- YAML syntax may represent strings, booleans, numbers, arrays, and nested objects differently from JSON. Review the output rather than treating a valid parse as application validation.
Input, output, copying, and download data URLs stay in your browser; they are not uploaded to MV Tools.
How to Convert CSV, JSON, and YAML Data SafelyReview structured data before reuse
Check the result
- Parse the output again and compare headers, empty fields, dates, decimal values, and leading zeroes.
- Use a representative record in the destination system before importing a full file.
Know the limit: A valid format can still contain wrong business values; conversion cannot infer your intended schema or meaning.
YAML to JSON and JSON to YAML Converter
Convert YAML configuration files to JSON and JSON back to YAML locally with indentation, key sorting, and downloadable output.
What This Tool Does
This browser-based converter parses YAML into structured data, exports readable JSON, and converts JSON objects or arrays back into YAML. It is useful for config files, API fixtures, CI examples, and developer documentation.
Common Use Cases
- Converting YAML configuration files into JSON for APIs, tests, or tooling
- Turning JSON examples back into YAML for documentation, CI, Kubernetes, or app config snippets
- Checking YAML or JSON syntax and normalizing indentation before sharing
How Data Is Handled
YAML and JSON conversion runs locally in your browser. Your configuration text and data are not uploaded to the backend.
FAQ
Is my YAML or JSON uploaded?
No. Parsing and conversion run locally in your browser.
Can it convert JSON arrays and nested objects?
Yes. Arrays, nested objects, strings, numbers, booleans, and null values are supported.
Does it preserve comments from YAML?
No. The converter focuses on data conversion, so YAML comments are not preserved in JSON output.