Free YAML/JSON Converter
Convert YAML to JSON and JSON to YAML in one click, with formatting. Great for config files, CI/CD, and Kubernetes manifests. Fully local — no data uploaded.
Key Features
Two-way Conversion
Switch between YAML→JSON and JSON→YAML in one click.
Smart Formatting
Results are automatically indented and beautified for high readability.
Type Preservation
Numbers, booleans, arrays, and nested objects are fully preserved.
Local Processing
All conversion happens locally in the browser — nothing is uploaded.
How to Convert
Paste Content
Paste your YAML or JSON content into the input box.
Choose Direction
Select YAML→JSON or JSON→YAML.
Convert & Copy
Click Convert; the result is formatted automatically and can be copied in one click.
Frequently Asked Questions
Which YAML features are supported?
Standard YAML 1.2 syntax: nested objects, arrays, multi-line text, anchors, and comments. Conversion is powered by the mature js-yaml library.
Will data be lost when converting JSON to YAML?
No. JSON is a subset of YAML, so all JSON data converts to YAML losslessly. However, YAML comments are dropped when converting to JSON because JSON does not support comments.
How is the result formatted?
YAML→JSON output is indented with 2 spaces; JSON→YAML output uses standard YAML indentation, keeping it readable.
Is my data uploaded?
No. All conversion happens locally in the browser via the built-in js-yaml library — content is never sent to any server.