Developer Tool

JSON/YAML Converter

Convert between JSON and YAML formats instantly — paste your data and get the converted output in real time, all processed locally in your browser.

100% local

Direction

Indent

Direction

Indent

JSON

YAML

Paste data to convert

How it works

JSON/YAML Converter in 3 steps

Paste your data
Paste your JSON or YAML into the input panel. Choose the conversion direction using the toolbar.
Choose direction & options
Select JSON → YAML or YAML → JSON, and pick your preferred indentation (2 or 4 spaces).
Copy the result
The converted output appears instantly in the output panel. Click the copy button to copy it to your clipboard.

Practical guides

Get the most out of JSON/YAML conversion

How it works

JSON and YAML are two of the most popular data serialization formats. JSON is the standard for APIs and data exchange, while YAML is preferred for configuration files due to its human-readable syntax.

This converter lets you switch between both formats instantly, which is useful when migrating configs, debugging API responses, or preparing data for different systems.

Quick & easy

Privacy & security

This converter runs entirely in your browser. No data is ever sent to a server — the conversion happens locally using JavaScript.

No data is sent to any server — all processing happens locally in your browser for maximum privacy.

100% browser-based

Frequently asked questions

JSON/YAML Converter — FAQ

Everything you need to know about converting JSON and YAML

YAML (YAML Ain't Markup Language) is a human-readable data serialization format. It uses indentation instead of braces/brackets, making it popular for configuration files like Docker Compose, Kubernetes manifests, GitHub Actions, and CI/CD pipelines.

YAML is preferred for configuration files that humans read and edit frequently (Docker, K8s, CI/CD). JSON is better for data exchange between systems, APIs, and when strict parsing is needed. YAML supports comments; JSON does not.

For standard data types (strings, numbers, booleans, arrays, objects), the conversion is fully lossless. However, YAML-specific features like anchors, aliases, and comments have no JSON equivalent and will be lost when converting to JSON.

Yes. If the input is invalid JSON or YAML, an error message is displayed with details about the parsing issue. Only valid input produces output.

Yes. You can choose between 2-space and 4-space indentation for the output using the toolbar options.

No. All conversion is performed entirely in your browser using JavaScript. No data is ever uploaded or transmitted.

JSON/YAML Converter

JSON/YAML Converter in 3 steps

Paste your data

Choose direction & options

Copy the result

Get the most out of JSON/YAML conversion

How it works

Privacy & security

JSON/YAML Converter — FAQ

What is YAML?

When should I use YAML instead of JSON?

Is the conversion lossless?

Does this tool validate my input?

Can I customize the output indentation?

Is my data sent to a server?

JSON/YAML Converter

JSON/YAML Converter in 3 steps

Paste your data

Choose direction & options

Copy the result

Get the most out of JSON/YAML conversion

How it works

Privacy & security

JSON/YAML Converter — FAQ

What is YAML?

When should I use YAML instead of JSON?

Is the conversion lossless?

Does this tool validate my input?

Can I customize the output indentation?

Is my data sent to a server?