YAML to JSON Converter
Paste YAML to see the matching JSON as you type. Syntax errors are shown with the line and column where they occur.
Your files never leave your device — everything runs in your browser.
YAML
JSON
How to Use
- 1Paste your YAML, for example a Kubernetes manifest or docker-compose.yml.
- 2The JSON output appears as you type.
- 3If something is wrong, the error message shows the line and column.
- 4Choose pretty-printed or minified output, then copy or download it.
Frequently Asked Questions
What happens with multi-document YAML files?
When a file contains several documents separated by ---, each one becomes an element of a JSON array. A single document converts to a single JSON value.
Are anchors and aliases supported?
Yes. Anchors (&name) and aliases (*name) are resolved, so the JSON output contains the full, expanded values.
Can I use it to validate YAML?
Yes. If the YAML can't be parsed, for example because of broken indentation, you'll see an error pointing to the exact position.
Does my config leave my computer?
No. Everything runs locally in your browser. That matters for config files that often contain hostnames or other sensitive settings.