Processed locally — your file never leaves your device
YAML to JSON Converter
Convert YAML to JSON, entirely in your browser.
How it works
- Paste YAML, or open a .yaml/.yml file.
- Click Convert — parsed locally using a safe-by-default YAML parser.
- Copy the result or download it as a .json file.
Frequently asked questions
- Is my YAML uploaded anywhere?
- No. Conversion happens locally in your browser.
- Is it safe to parse YAML from an untrusted source?
- Yes. Some YAML parsers in other languages support tags that can instantiate arbitrary types or even execute code — this tool uses a safe-by-default parser that only ever produces plain objects, arrays, strings, numbers, booleans and null, never anything else.
- What if my YAML is invalid?
- You'll see a clear error describing the problem instead of a result.
- Can I open a file instead of pasting?
- Yes, there's an Open file button, or you can paste text directly.
- Does it support YAML anchors and aliases?
- Yes, within a conservative limit — an excessive number of anchor/alias references (a known YAML denial-of-service pattern) is rejected rather than expanded.