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YAML to JSON Converter

Convert YAML to formatted JSON, including multi-document files. Free and private YAML converter.

Your files never leave your device

How to convert YAML to JSON

  1. 1

    Choose your YAML files

    Click the upload area or drag files onto it. Nothing is uploaded — files are opened locally.

  2. 2

    Start the conversion

    Press the convert button. Your browser converts the files in seconds.

  3. 3

    Download the result

    Save each file individually or everything at once as a ZIP.

Turn configuration files into JSON for APIs, validators and tooling. Files with multiple YAML documents become a JSON array.

What is YAML?

YAML is a human-friendly data format popular for configuration — Kubernetes manifests, Docker Compose, GitHub Actions and more.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight structured data format used by virtually every web API and modern application.

Safe for confidential files

Unlike upload-based converters, ZapMorph processes files inside your browser tab. Your documents are never transmitted, stored or logged — close the tab and they’re gone.

Frequently asked questions

Is the yaml to json converter free?

Yes. Convert 1 file a day without an account, or 5 files a day with a free account. Pro removes all daily limits.

Are my files uploaded to a server?

No. The conversion runs entirely in your browser, so your files never leave your device. We only count how many files you convert — never their names or contents.

What is the maximum file size?

Up to 25 MB per file without an account, 50 MB with a free account, and 1 GB on Pro. Very large files also depend on your device’s memory.

Can I convert multiple YAML files at once?

Yes. Select several YAML files at once — up to 5 on the free plan or 50 on Pro — and download all results in a single ZIP.

Does it work on Mac, Windows, iPhone and Android?

Yes. It works in any modern browser — Chrome, Edge, Firefox and Safari — on desktop and mobile, with nothing to install.

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