Write and validate YAML with a live preview
Edit YAML on the left and watch the parsed JSON update on the right as you type. Syntax errors show up immediately with the parser's message, so you can catch mistakes before they end up in a config file or CI pipeline.
Your draft autosaves to this browser, and when you're done you can download the raw .yaml file or copy the converted JSON.
Frequently asked questions
Where is my document saved?
In your browser's local storage, on your device. It autosaves as you type — but it's tied to this browser, so download the .yaml file for anything important.
How does the JSON preview work?
As you type, your YAML is parsed and shown as equivalent JSON on the right. If there's a syntax error, you'll see the parser's error message instead so you can fix it before exporting.
Can I convert my YAML to JSON?
Yes — once your document parses without errors, click "Copy as JSON" to copy the converted JSON to your clipboard.
Is my data sent anywhere?
No. Parsing, validation, and autosave all happen locally in your browser — nothing is uploaded to a server.