BYTETOOLS

JSON to YAML Converter

Convert JSON to clean block-style YAML online. Choose the indent width, sort keys, and keep numeric strings quoted — all inside your browser.

Drop a .json file here or click to browse

What is the JSON to YAML Converter?

The ByteTools JSON to YAML Converter serialises any JSON document as readable block-style YAML. Nested objects are indented, arrays become dash-prefixed sequence items aligned under their key, and multi-line strings are written as literal block scalars instead of being crammed into one escaped line.

  • Block-style output with 2- or 4-space indentation
  • Multi-line strings emitted as | literal block scalars
  • Strings quoted only when they would otherwise change type
  • Optional alphabetical key sorting and compact flow style
  • Empty objects and arrays written as {} and []
  • 100% in-browser — your JSON is never uploaded

How to use the JSON to YAML Converter

  1. 1

    Paste your JSON into the input box, or drop a .json file onto the drop zone.

  2. 2

    Pick an indent width of 2 or 4 spaces.

  3. 3

    Tick 'Sort mapping keys A–Z', 'Compact flow style' or 'Multi-line strings as | block scalars' if you want them.

  4. 4

    Click Convert to YAML, then Copy the result or Download it as a .yaml file.

About the JSON to YAML Converter

The ByteTools JSON to YAML Converter serialises any JSON document as readable block-style YAML. Nested objects are indented, arrays become dash-prefixed sequence items aligned under their key, and multi-line strings are written as literal block scalars instead of being crammed into one escaped line.

Quoting is deliberate rather than blanket. A string is only quoted when leaving it bare would change its meaning — because it looks like a number, a boolean, a null, a date, or because it contains a colon-space or a hash. That means a ZIP code like 01234 survives the trip instead of turning into an integer.

The conversion happens 100% locally in your browser. Nothing is uploaded, logged or kept, so you can convert API payloads, service configuration and internal schemas without any of it leaving your machine.

Frequently asked questions

How do I convert JSON to YAML?

Paste your JSON, choose an indent width, and click Convert to YAML. The block-style YAML appears below and can be copied to the clipboard or downloaded as a .yaml file straight away.

Why are some of my strings quoted in the YAML output?

A string is quoted when leaving it bare would change its type — values like 01234, true, yes, null or 2024-01-15 would be read back as a number, boolean, null or date. Quoting keeps them text on the round trip.

How are multi-line strings handled?

With the block-scalar option on, any string containing a newline is written as a | literal block, which is far easier to read than a single line full of \n escapes. Turn the option off to force double-quoted strings instead.

Can I sort the keys alphabetically?

Yes. Tick 'Sort mapping keys A–Z' before converting and every mapping in the document is emitted in alphabetical order, which is handy for diffing two configuration files.

Is the YAML output valid for Kubernetes or Docker Compose?

Yes — the output is standard block YAML that any parser accepts. Kubernetes and Compose do expect particular key names and structures, so make sure your JSON already matches the shape those tools require.

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