What are the differences between YAML and JSON?

JSON is strict in syntax (braces, quotes required) and widely used in APIs. YAML uses indentation and supports comments, making it more human-readable for configuration files.

How to convert JSON to YAML?

Paste your JSON data in the left panel, select "JSON → YAML" mode and the result will appear in the right panel automatically.

Is my data sent to a server?

No. All conversion processing is done locally in your browser using JavaScript. Nothing is sent externally.

🔄

yaml json converter,

YAML ↔ JSON Converter

Instantly convert between YAML and JSON with real-time validation.
Perfect for config files, API specs, and infrastructure definitions.

↔️

Bidirectional

YAML→JSON and JSON→YAML

✅

Validation

Real-time syntax error detection

✨

Auto-format

Output is always neatly formatted

YAML Input

JSON Output

🔒All processing is done locally in your browser.

about,

About

A free online tool for bidirectional YAML ↔ JSON conversion with real-time validation. Powered by the js-yaml library. Useful for config file migration, CI/CD pipeline setup, Kubernetes manifest inspection, and API spec authoring.

Sensitive config files can be processed safely — nothing ever leaves your browser.

how to use,

How to Use

STEP 1

Select Direction

Choose YAML→JSON or JSON→YAML using the tab buttons.

STEP 2

Paste Your Content

Paste YAML or JSON into the left text area.

STEP 3

Copy the Result

Converted output appears instantly on the right. Click "Copy" to grab it.

glossary,

Glossary

YAML: YAML (Yet Another Markup Language) — a human-readable data serialization format using indentation. Widely used for config files.
JSON: JavaScript Object Notation — a data format using braces and brackets. The standard for web APIs and configs.
Serialization: Converting a data structure into a storable/transmittable string format. Deserialization is the reverse.
YAML Anchor / Alias: A YAML feature using & to define an anchor and * to reference it, reducing repetition.
js-yaml: A reliable JavaScript YAML library supporting YAML 1.2 / RFC compliance.
Indentation: In YAML, structure is expressed using consistent spaces (not tabs). Inconsistent indentation causes parse errors.

faq,

FAQ

Q.Is my data sent to a server?: No. js-yaml runs entirely in the browser; your content is never transmitted.
Q.Are YAML anchors and aliases supported?: Yes. js-yaml expands anchors and aliases correctly when converting to JSON.
Q.Does it support Unicode / non-ASCII characters?: Yes. UTF-8 content including Japanese, Arabic, and other scripts is fully supported.
Q.Does it handle Kubernetes multi-document YAML?: Multi-document YAML separated by --- is handled; the first document is converted.