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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

Inside The Conversion

See The Input. Inspect The Result.

A real JSON to YAML conversion using a sample file. Compare the files below, then use the converter above with your own file.

Recorded Sample

Converted in the browser in this run.

Input816 B

harbour-lane-price-list.json

Opening Lines

{
  "bakery": "Harbour Lane Bakery",
  "items": [
    {
      "item": "Sourdough loaf",
      "size": "800 g",
      "price_aud": 8.5
    },
    {
      "item": "Seeded rye",
      "size": "750 g",
      "price_aud": 9.0
Result499 B

harbour-lane-price-list.yaml

Opening Lines

bakery: Harbour Lane Bakery
items:
  - item: Sourdough loaf
    size: 800 g
    price_aud: 8.5
  - item: Seeded rye
    size: 750 g
    price_aud: 9
  - item: Butter croissant
    size: each
    price_aud: 4.8
  - item: Almond croissant

Previews show the sample files from this recorded conversion. Choose Input or Result to focus on one file.

View The Original Run Capture

A screenshot of the completed run, preserved in its original theme. The comparison above adapts to your current theme.

Recorded converter result: harbour-lane-price-list.json converted to harbour-lane-price-list.yaml (499 B)

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.

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