YAML to JSON Converter
Convert YAML — the human-friendly config format — into JSON, with clear messages when a document won't parse. It uses a robust YAML parser and runs in your browser, so your configuration never leaves your device.
- 100% free
- Private & safe
- Runs in your browser
Why use YAML to JSON?
YAML to JSON is a quick, no-nonsense developer utility that runs entirely client-side, so your code and data never leave your machine.
- Runs instantly in your browser — nothing to install, nothing uploaded.
- Completely free, with no account, no watermarks and no usage limits.
- Handles Input: YAML 1.2; Output: JSON.
- Paste your YAML document.
- Works on any device — desktop, tablet and phone — and is fully keyboard accessible.
How to use YAML to JSON
- Paste your YAML document.
- Click Convert to JSON.
- Nested mappings and sequences become JSON objects and arrays.
- Copy or download the JSON.
Examples
- Converting a docker-compose or CI YAML snippet to JSON.
- Inspecting YAML config as JSON.
Supported formats & limits
- Input: YAML 1.2
- Output: JSON
Limitations
- Anchors and complex YAML features are resolved by the parser where supported.
- Invalid indentation produces a clear error.
Frequently asked questions
Which YAML version is supported?
Standard YAML as handled by the js-yaml parser.
What if my YAML is invalid?
You get a readable error message describing the problem.
Is my config uploaded?
No — parsing is entirely local.
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