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JSON Formatter

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YAML to JSON Converter

Convert YAML configuration files into JSON while preserving comments, anchors and multi-document streams.

Launching soon

The YAML to JSON Converter is on the way

We are polishing this tool right now. In the meantime, use our fully-featured JSON Formatter — it already handles most workflows including validation, minification and tree view.

  • Runs 100% client-side
  • No sign-up, no usage limits
  • Free forever
  • Follows current specifications
Open the JSON Formatter

Why use our YAML to JSON Converter?

100% private

Everything runs in your browser. Your data never leaves your device — safe for production payloads.

Instant results

No round trips, no rate limits, no login. Format, validate and inspect megabytes of JSON in milliseconds.

Standards-first

Follows RFC 8259 / ECMA-404 exactly. Reports errors with precise line and column diagnostics.

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JSON Validator

Validate JSON syntax against RFC 8259 in real time. Precise line and column error reporting, 100% client-side.

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JSON Viewer

Interactive collapsible tree viewer for large JSON documents with search, copy-path, and syntax highlighting.

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JSON Minifier

Strip whitespace and shrink JSON payloads to the smallest possible size for APIs, storage, and network transfer.

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JSON Tree Viewer

Explore nested JSON as an interactive tree — expand, collapse, filter and copy JSON paths of any node.

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JSON Compare

Side-by-side comparison of two JSON documents with structural highlighting to spot differences instantly.

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JSON Diff

Structural diff of two JSON objects or arrays showing added, removed and modified keys with paths.

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