How to use it
- Pick a direction, JSON to YAML or YAML to JSON.
- Paste your JSON or YAML into the input box.
- The result appears instantly as you type, or press Convert.
- Press Copy output to grab the result.
If the input is invalid, you get the exact parser error so you can fix it fast. Nothing is uploaded, so it is safe to paste secrets, tokens or production config.
JSON and YAML
JSON (JavaScript Object Notation) is the default format for APIs and web data. It is strict, compact and easy for machines to parse, but the brackets, braces and quotes make long files hard for people to read.
YAML (YAML Ain't Markup Language) describes the same data, objects, arrays, strings and numbers, using indentation instead of braces. That makes it far easier to read and edit by hand, which is why tools like Docker Compose, Kubernetes, GitHub Actions and Ansible use it for configuration.
Because both formats map to the same underlying data model, you can move between them without losing structure. This converter parses your input into that model and prints it back out in the other format. The data and its shape are preserved, though formatting choices like YAML comments and JSON key order in objects are normalized.
A common workflow is taking a JSON API response and turning it into readable YAML for a config file, or going the other way to feed a YAML file into a tool that only accepts JSON. Both directions are one click here.
Frequently asked questions
Is my data sent anywhere?
No, it is converted in your browser and never uploaded.
Can it convert YAML back to JSON?
Yes, switch the direction to YAML to JSON and paste your YAML.
What if my input is invalid?
You get the exact parser error and the output is cleared.
Does it keep comments?
No, the data and structure are preserved but inline YAML comments are dropped.
Is it free?
Yes, completely free with no sign-up and no limits.
Related: JSON Formatter