YAML to JSON Converter

Convert YAML data to JSON format instantly. Paste your YAML on the left and get pretty-printed JSON on the right. Errors are shown inline — no popups. Your data never leaves your device.

Loading YAML library...

Output will appear here

Frequently Asked Questions

Is this YAML to JSON converter free?
Yes, 100% free. No account, no limits, and nothing is uploaded — the conversion runs entirely in your browser.
What YAML features are supported?
The tool uses the js-yaml library which supports YAML 1.2, including anchors, aliases, multi-line strings, nested objects, and arrays.
Why is my YAML showing an error?
YAML is whitespace-sensitive. Make sure you are using spaces (not tabs) for indentation and that your colons are followed by a space. The error message in the output panel will pinpoint the issue.
Are my files safe?
All processing runs locally in your browser. Nothing is sent to any server.
Does it work on mobile?
Yes, it works on all modern browsers including mobile Safari and Chrome on iOS and Android.