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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