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JSON → YAML

Convert JSON to YAML.

Convert JSON into readable YAML for configs and CI files. Key order preserved, fully round-trippable back to JSON.

Convert nowOr use the universal converter
Converts in your browserNo signupNever uploadedFree

JSON vs YAML, and what this converter keeps

JSON and YAML describe the same data: objects, arrays, strings, numbers, booleans andnull, in two different styles. JSON is compact and ubiquitous in APIs; YAML drops the braces and quotes for an indentation-based layout that's far easier to read and edit, which is why it dominates configuration files.

When you'd want YAML

  • CI/CD pipelines: GitHub Actions, GitLab CI, CircleCI
  • Kubernetes manifests and Helm values.yaml
  • docker-compose files
  • App and infra config: Ansible, Rails, Spring

What's preserved

The conversion is lossless and key order is kept. Strings, numbers, booleans and null map directly; nested objects become indented blocks and arrays become - lists. Because YAML is a superset of JSON, the output round-trips cleanly back to identical JSON.

Two things to know: JSON has no comments, so none are invented here: add them after converting. And YAML treats indentation as structure, so if you hand-edit the result, keep spaces consistent and avoid tabs.

How it works

  1. 01

    Choose your JSON

    Drop a file or pick one from your device. Private by default.

  2. 02

    Convert losslessly

    JSON becomes YAML right in your browser: structure and values preserved, no upload, no paid API.

  3. 03

    Download

    Grab your YAML.

Lossless, structure-preserving conversion

Converts in your browser, never uploaded

No watermark, no signup to try

Handles large files

Free and open-source engine

JSON to YAML

JSON and YAML are structured-data formats. This parses your JSON and re-serialises the same data as valid YAML, entirely in your browser. Nothing is uploaded. Key order and whitespace may be normalised; the data itself is preserved.

Converting a lot of these?

Grab a conversion pack for heavy use, or convert them straight from your own code with the FileWhirl API.

See plans

Common questions

Is it free?+

Yes. Convert JSON to YAML free. No signup, no watermark, no daily cap.

Is my data private?+

It runs entirely in your browser. Your file never leaves your device or touches our servers.

Is the conversion accurate?+

Yes. We use a faithful, lossless engine. Keys, values and nesting are preserved so the output round-trips back to your source.

Related conversions

YAML to JSONJSON to XMLUniversal converter