Free YAML and JSON converter
YAML ↔ JSON Converter
Convert YAML to formatted JSON or turn JSON into readable YAML with configurable indentation.
Developer Tools
Browser based
Runs on the current page
Copy-ready
Use the output where you work
No sign-in
Open the tool and get moving
Developer tool
Convert YAML and JSON
Translate configuration and structured data between YAML 1.2 and JSON with syntax validation.
YAML comments are not included in JSON because JSON has no comment syntax. Alias expansion is limited for safer local parsing.
Output will appear here.
Built for the task
Format, validate, encode, decode, and test.
Fast browser utilities for common implementation, debugging, and content-cleanup tasks.
More tools
Continue with related developer tools.
JSON Formatter
Format, prettify, and minify JSON in the browser with instant syntax feedback.
CSV ↔ JSON Converter
Convert CSV to JSON or JSON to CSV with header, delimiter, type-detection, and formatting controls.
JSON Validator
Validate JSON syntax, inspect parse errors, and view a clean formatted preview.
SQL Formatter
Format SQL with dialect-aware rules, keyword casing, indentation, and query-spacing controls.
UUID Generator
Generate random UUID v4 values for tests, records, fixtures, and temporary identifiers.
JWT Decoder
Decode JWT header and payload sections, inspect claims, and check common token timestamps.
FAQ
YAML ↔ JSON Converter questions.
Which YAML version does this tool support?
It uses a YAML 1.2-compatible parser and supports common mappings, arrays, anchors, aliases, block strings, and scalar values.
Will YAML comments appear in the JSON output?
No. JSON has no comment syntax, so comments are not included when YAML data is converted to JSON.
Custom software