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JSON to YAML

100% Free

Convert JSON into clean, block-style YAML — with configurable indentation, optional key sorting, and safe quoting so the output round-trips perfectly. All in your browser.

Block-Style YAML
Safe Quoting
Instant
100% Client-Side
YAML output

12 lines of YAML · converted in your browser.

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  title="JSON to YAML">
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How to Use

  1. 1 Paste your JSON into the input box
  2. 2 Pick an indent size of 2 or 4 spaces
  3. 3 Optionally sort keys A–Z or quote every string
  4. 4 Watch the YAML update instantly as you type
  5. 5 Copy the YAML or download it as a .yaml file

Features

  • Clean block-style YAML for nested objects and arrays
  • Configurable 2- or 4-space indentation
  • Optional alphabetical key sorting at every level
  • Safe quoting of values that look like numbers, booleans, or null
  • Inline {} and [] for empty objects and arrays
  • Copy to clipboard or download as a .yaml file

Why it Matters

Lots of tools speak JSON while CI pipelines, Kubernetes, and Docker Compose speak YAML. Converting by hand invites indentation slips and quoting bugs that break a deploy. A converter that handles structure and quoting correctly turns a fiddly chore into a one-click step.

★★★★★

Use Cases

Config Files

Turn JSON config into YAML for CI, Compose, or Kubernetes

Format Migration

Move data between JSON-based and YAML-based tools

Readable Output

Produce human-friendly YAML for docs and examples

Quick Inspection

Read large JSON more easily as indented YAML

What this tool does

JSON to YAML converts a JSON document into clean, block-style YAML. It handles nested objects and arrays, lets you choose the indentation, can sort keys alphabetically, and quotes only the values that genuinely need it.

How it works

The JSON is parsed and re-emitted as YAML: objects become key: value lines, arrays become - sequences, and structure is expressed through indentation. Strings that could be misread as numbers, booleans, or null are quoted automatically so the YAML parses back to exactly the same data.

Privacy

Everything runs locally in your browser. Nothing you paste is uploaded, logged, or stored.

Frequently Asked Questions

How does the JSON to YAML conversion work?
Your JSON is parsed into a data structure, then emitted as block-style YAML. Objects become key: value lines, arrays become dash-prefixed sequences, and nesting is expressed with indentation. The result is valid YAML that parses back to the same data.
Why are some strings quoted and others not?
A string is quoted only when it needs to be — for example if it looks like a number, a boolean, or null, contains YAML-special characters, or has leading/trailing spaces. This keeps the output clean while guaranteeing it round-trips correctly.
Can I sort the keys?
Yes. Turn on 'Sort keys A–Z' to order object keys alphabetically at every level, which makes diffs smaller and output predictable. Leave it off to preserve the original key order from your JSON.
What indentation does it use?
You choose 2 or 4 spaces. YAML uses indentation (never tabs) to express structure, and both options produce valid output — pick whichever matches your project's existing files.
Is my data uploaded?
No. The conversion runs entirely in your browser. Nothing you paste is sent to a server, logged, or stored — refreshing the page clears it.
📖

Want to understand the math?

Browse all guides →
JSON vs YAML
json

JSON vs YAML: When to Use Each and How to Convert

Understand the real differences between JSON and YAML, when each format fits, and how a converter turns JSON into clean, round-trip-safe YAML without quoting bugs.

24 Jun 2026

5 min read

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