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JSON ↔ YAML Converter - Online

This tool runs entirely in your browser. Your data is never uploaded to our servers.

Configuration files and API samples often switch between JSON and YAML, and reformatting by hand can introduce indentation and quoting mistakes.

Convert JSON to YAML or YAML to JSON instantly. Runs in your browser (no server upload).

Show detailed guide & explanations▼

Why you may need this tool

Many systems accept either JSON or YAML, but teams often need to move configuration between tools that prefer different formats. Manual conversion is error - prone—especially with YAML indentation, quoting rules, and nested structures. A converter helps you keep the content consistent while switching representations, which reduces deployment failures caused by formatting mistakes.

How to use

Paste JSON or YAML, convert, and then scan the structure to confirm key nesting and lists are preserved.

  1. Choose conversion direction (JSON→YAML or YAML→JSON)
  2. Paste your input
  3. Convert and copy/download the output

Examples

Using YAML configs in tools that require JSON input
Some API clients and test runners expect JSON. Converting YAML to JSON avoids duplicating configuration and reduces drift between formats.
Reducing indentation errors when moving JSON to YAML
YAML is whitespace - sensitive, so manual rewriting can fail subtly. Conversion gives you a baseline structure that you can verify before deployment.

Benefits & differentiators

Fast conversion supports smoother collaboration: teams can share config in a preferred format without rewriting content. It also helps with troubleshooting when a system rejects a file due to syntax or indentation. Seeing both formats side by side makes it easier to understand how nested objects and arrays translate, which improves long - term maintainability of configuration assets.

Who this is for

Recommended if you: - maintain configs across tools with different format preferences - work with CI/CD, Kubernetes, or app config files - want to reduce syntax and indentation mistakes - need a quick way to share the same config in another format

FAQ

Is my data uploaded to a server?
No. Conversion runs entirely in your browser.
Does it support multi - document YAML ( - )?
This tool parses a single YAML document. Multi - document YAML may not convert as expected.
Why do I get a parsing error?
The input may be invalid JSON/YAML. Check for trailing commas (JSON) or indentation/quotes (YAML).
Will the converter preserve comments?
No. JSON has no comments, and YAML comments are not preserved when converting to JSON.
Does it preserve key order?
JavaScript generally preserves insertion order for plain objects, but exact ordering is not guaranteed across all cases.

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