Data Converter

YAML to JSON Converter

Parse any YAML document and get clean, indented JSON in milliseconds — nested mappings, lists, and primitives handled automatically.

100% In-Browser & PrivateNo uploadsFree forever

YAML is everywhere — config files, CI pipelines, Kubernetes manifests — but many tools expect JSON. MyJSONPal converts YAML to JSON in milliseconds: paste your YAML and get a cleanly indented, valid JSON document with every nested mapping, list, and scalar preserved.

The parser follows the YAML 1.2 spec: nested objects become nested JSON objects, `- item` list entries become arrays, and scalars are typed correctly (numbers stay numbers, booleans stay booleans, quoted values stay strings). Because it runs entirely in your browser, you can convert private configs without a single upload.

Paste YAML, copy or download the JSON, and use it in an API, a script, or anywhere JSON is required — no servers, no sign-up, free forever.

How to convert YAML to JSON

  1. 1Paste YAML text into the input editor, or drag and drop a .yaml file anywhere on the input pane.
  2. 2Select YAML ➔ JSON from the format dropdown — the conversion happens instantly.
  3. 3Review the formatted JSON output with syntax highlighting.
  4. 4Copy the JSON to your clipboard or download it as a .json file.
  5. 5Hit Swap to convert the result back to YAML at any time.

Why MyJSONPal is different

Privacy-first, by design

All parsing, validation and conversion runs in your browser. Your data is never sent, logged, cached or sold — close the tab and it is gone.

Fast, even on huge files

Heavy processing is offloaded to a Web Worker, so multi-megabyte documents are handled without freezing the interface.

No accounts, no limits

There is nothing to sign up for and no usage quota. Paste, format, convert and download as often as you like.

Frequently asked questions

Does it handle nested YAML?

Yes. Nested mappings become nested JSON objects and `- item` lists become JSON arrays, with correct indentation at any depth.

How are scalars typed?

Numbers stay numbers, true/false become booleans, and quoted strings stay strings. The parser follows YAML 1.2 typing rules.

What if my YAML is invalid?

The parser reports the exact line and column of the problem so you can fix it. Valid YAML converts to valid JSON every time.

Can I convert large YAML files?

Yes. Conversion runs in a Web Worker, so large documents parse without freezing the page — the limit is whatever your browser can handle.

More free tools