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Convert YAML to JSON Online

Convert YAML configurations, Kubernetes manifests, and Docker Compose files to JSON safely in your browser.

Runs in browser

Drop your .yaml file here

Up to 10 MiB. Converted privately in your browser.

Choose Files
Max 10 MB per file•Up to 1 files
100% Private — Processed locally in your browser

How to use Convert YAML to JSON Online

  1. 1

    Upload a YAML file or paste YAML text.

  2. 2

    Click convert to produce formatted JSON output.

  3. 3

    Copy the JSON or download the result.

Safe YAML to JSON transformation

Parses YAML files safely into standard JSON format. Ideal for translating Kubernetes manifests, CI/CD pipelines, and configuration files into JSON for APIs and programmatic workflows.

What to expect and limitations

Maximum file size: 10 MiB. Recursion depth capped at 25 levels. Custom unsafe YAML tags and object instantiations are disallowed.

Private browser processing

Your data is parsed, validated, and converted entirely in your web browser. File content is never transmitted over the internet to FileNimble servers. All calculations run in your local browser memory. Clearing the tool or leaving the page releases application references; this is not a guarantee of secure memory erasure. Saved downloads remain on your device.

Formula injection prevention is applied by default when generating CSV output to help protect against remote command execution and exfiltration attacks when opening files in spreadsheet applications such as Microsoft Excel and Google Sheets.

Frequently Asked Questions

Are multiple YAML documents supported?

Standard single documents and multi-item lists are fully supported.

Can I format or minify the resulting JSON?

Yes. Output is neatly formatted with 2-space indentation by default for easy inspection.

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