YAML to JSON Converter

JSON & Data

Parse YAML documents and convert them to JSON for APIs and programmatic use.

Pretty print JSON

YAML Input

#yaml to json#parse yaml#yaml converter

About YAML to JSON Converter

Parse YAML documents and convert them to JSON for APIs and programmatic use. YAML to JSON Converter runs entirely in your browser — no installation, no uploads, and no data ever leaves your device.

Common use cases: convert kubernetes yaml back to json for tooling; parse github actions config into json; migrate yaml settings to json-based systems. Whether you are debugging, prototyping, or building production code, having a fast and private tool for this task saves time compared to writing one-off scripts or using an online tool that logs your data.

Like every tool in Catalyst, this one is free forever, requires no login, and is safe to use with confidential data. All processing happens client-side via native browser APIs.

How to use YAML to JSON Converter

1
Open the tool
Open YAML to JSON Converter directly — no signup or installation required. The interactive interface loads instantly.
2
Paste or enter your input
Drop your data into the input area. The tool validates and processes your input live as you type or paste.
3
Review the result
The output updates instantly. If the tool has configuration options, adjust them and watch the result update.
4
Copy or download
Use the copy button to send the result to your clipboard. Nothing is saved between page loads, so closing the tab discards everything.

Frequently asked questions

Is any data sent to a server?

No. The tool runs entirely in your browser using native JavaScript and Web APIs. Nothing you paste or upload is transmitted, logged, or stored. You can verify this by disconnecting your network and seeing the tool continue to work.

Is this tool free to use?

Yes. It's completely free with no login, signup, API key, or usage limits. Catalyst is funded by ads and will remain free forever.

Does it work offline?

Once the page has loaded, yes. All processing happens locally in your browser, so you can use the tool on airplanes, trains, or in air-gapped environments.