YAML to JSON

Convert YAML configs and fragments to JSON for APIs, Postman, webhooks, tests, and documentation.

For this tool, processing runs locally in your browser and data is not sent to the server.

YAML to JSON is a free online converter that transforms YAML fragments and configs into JSON for APIs, Postman, webhooks, tests, documentation, and dev tasks. It supports formatted and minified output, shows YAML errors with line and column, and runs entirely in your browser without sending data to the server.

What it does

Output

Processing

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How to use

Paste a YAML fragment, Kubernetes manifest, Docker Compose file, CI/CD config, or other YAML into the input field.
Choose the output format: formatted JSON with indentation or minified JSON.
Optionally configure key sorting and Unicode handling.
Copy the JSON and use it in an API, Postman, webhook, documentation, tests, or dev tools.

More about this tool

YAML to JSON converts YAML fragments and configs into JSON for APIs, Postman, webhooks, tests, documentation, and dev tasks. The tool is useful when working with Kubernetes manifests, Docker Compose files, GitHub Actions, GitLab CI, backend configs, and YAML exports that need to be passed in JSON format.

You can choose formatted or minified JSON output, set the indent size, keep Unicode readable or escape non-ASCII characters. If the YAML has a syntax error, the service shows the message, line, column, and a context snippet.

All processing is done locally in the browser. Your data is not sent to the server.

Runs in the browser
Data is not sent to the server
Converts YAML to JSON
Supports formatted and minified JSON output
Shows YAML errors with line and column
Warns about YAML-specific behaviors
Useful for APIs, Postman, webhooks, Kubernetes, and CI/CD
No registration required

Frequently Asked Questions

How do I convert YAML to JSON?

Paste YAML into the input field, choose the output format, and click Convert. The tool parses the YAML and outputs JSON.

When is a YAML to JSON converter useful?

It is useful when a YAML config or fragment needs to be used in an API, Postman, webhook, tests, documentation, or tools that accept JSON.

Are YAML comments preserved in the JSON output?

No. JSON does not support comments, so YAML comments are not included in the result.

What happens to YAML anchors and aliases?

YAML anchors and aliases may be resolved by the parser or lose their original form. Check such sections manually after conversion.

Is multi-document YAML with --- supported?

If the input contains multiple YAML documents, they are converted into a JSON array of documents. The tool shows a warning about this behavior.

How is this different from the YAML Validator?

The YAML Validator only checks syntax and shows errors. YAML to JSON also transforms the parsed structure into JSON.

Can I get minified JSON output?

Yes. You can choose minified single-line JSON or formatted JSON with indentation in the settings.

Does the tool validate Kubernetes or Docker Compose schemas?

No. The tool converts the data format. Kubernetes, Docker Compose, GitHub Actions, or GitLab CI schema correctness must be verified with dedicated validators.

Is my data sent to the server?

No. YAML is processed locally in the browser and is not sent to the server.

Do I need to register?

No. The tool works immediately without registration.

How to use

Paste a YAML fragment, Kubernetes manifest, Docker Compose file, CI/CD config, or other YAML into the input field.

Choose the output format: formatted JSON with indentation or minified JSON.

Optionally configure key sorting and Unicode handling.

Copy the JSON and use it in an API, Postman, webhook, documentation, tests, or dev tools.

More about this tool

All processing is done locally in the browser. Your data is not sent to the server.

Runs in the browser
Data is not sent to the server
Converts YAML to JSON
Supports formatted and minified JSON output
Shows YAML errors with line and column
Warns about YAML-specific behaviors
Useful for APIs, Postman, webhooks, Kubernetes, and CI/CD
No registration required

Frequently Asked Questions

How do I convert YAML to JSON?

Paste YAML into the input field, choose the output format, and click Convert. The tool parses the YAML and outputs JSON.

When is a YAML to JSON converter useful?

It is useful when a YAML config or fragment needs to be used in an API, Postman, webhook, tests, documentation, or tools that accept JSON.

Are YAML comments preserved in the JSON output?

No. JSON does not support comments, so YAML comments are not included in the result.

What happens to YAML anchors and aliases?

YAML anchors and aliases may be resolved by the parser or lose their original form. Check such sections manually after conversion.

Is multi-document YAML with --- supported?

If the input contains multiple YAML documents, they are converted into a JSON array of documents. The tool shows a warning about this behavior.

How is this different from the YAML Validator?

The YAML Validator only checks syntax and shows errors. YAML to JSON also transforms the parsed structure into JSON.

Can I get minified JSON output?

Yes. You can choose minified single-line JSON or formatted JSON with indentation in the settings.

Does the tool validate Kubernetes or Docker Compose schemas?

No. The tool converts the data format. Kubernetes, Docker Compose, GitHub Actions, or GitLab CI schema correctness must be verified with dedicated validators.

Is my data sent to the server?

No. YAML is processed locally in the browser and is not sent to the server.

Do I need to register?

No. The tool works immediately without registration.