Is my data uploaded anywhere?

No. The conversion runs in your browser with JavaScript. Your data never leaves your device, and the tool keeps working if you lose your connection after the page has loaded.

How big a file can I convert?

Up to 25 MB per file. Very large files depend on your device’s memory, so if the page slows down, split the file into parts.

Can I convert JSON back to YAML?

Yes. Use the JSON to YAML converter, or press the swap button above the editor.

YAML⇄JSON

YAML to JSON converter

Paste YAML and get JSON instantly. Runs in your browser, so your data never leaves your device.

Input YAML

Output JSON

Indent

Runs in your browser. Your data is not uploaded or stored.

How to use it

Paste your YAML into the input box, upload a .yaml file, or drop a file onto the box.
The JSON appears as you type. Change the indentation if you need to.
Copy the result or download it as a .json file.

Good to know

Anchors, aliases and multi-line strings are resolved, so the result holds the final values.

About the formats

YAML

YAML is a readable data format that uses indentation instead of brackets. Kubernetes, Docker Compose, GitHub Actions and many CI tools use it for configuration.

JSON

JSON (JavaScript Object Notation) stores data as nested objects and arrays. It is the standard format for web APIs and the config files of most JavaScript projects.

Questions

Is my data uploaded anywhere?: No. The conversion runs in your browser with JavaScript. Your data never leaves your device, and the tool keeps working if you lose your connection after the page has loaded.
How big a file can I convert?: Up to 25 MB per file. Very large files depend on your device’s memory, so if the page slows down, split the file into parts.
Can I convert JSON back to YAML?: Yes. Use the JSON to YAML converter, or press the swap button above the editor.