Free · runs in your browser
YAML to JSON Converter
Convert between YAML and JSON formats instantly. Supports bidirectional conversion with file upload. All processing happens in your browser.
no account
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nothing stored
YAML
JSON
Input
Indent
Output
// how it works
How it works
step 01
Paste or upload
Paste YAML or JSON, or upload a file. Switch direction with the toggle.
step 02
Convert
Choose your indentation (2 or 4 spaces) and convert. Validation errors are shown inline.
step 03
Copy or download
Copy the result to your clipboard or download it as a .json or .yaml file.
// frequently asked
Common questions
Does my data ever leave my browser?
No. Conversion happens entirely in your browser using the js-yaml library. Nothing you paste or upload is sent to a server, logged, or stored.
Which YAML features are supported?
The converter supports standard YAML syntax, including nested objects, arrays, multi-line strings, and comments, using the widely adopted js-yaml library.
Can I convert JSON to YAML too?
Yes. Use the swap button above the input field to switch direction. The converter works both ways with the same indentation controls.
What happens if my input is invalid?
The converter shows an inline error message describing what went wrong, so you can fix your YAML or JSON before trying again.
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