JSON to YAML
ConverterConvert JSON data to YAML format with custom indentation and nested object support. Turn verbose JSON configs into clean readable YAML in a couple of seconds.
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About JSON to YAML
JSON and YAML serve different jobs: JSON is ideal for machine transport and APIs, while YAML — with its indentation syntax, comments, and minimal punctuation — dominates human-authored configuration, from Kubernetes manifests and Docker Compose to GitHub Actions and Ansible plays. This tool converts either direction entirely in your browser, preserving key order, handling nested objects, arrays, and multi-line strings, and escaping values correctly. The main trap to watch is type resolution: YAML may read strings like on, no, or 2024-01-01 as booleans or dates rather than text, so keep quotes where a value must remain a string. Nothing is uploaded, so it is safe to paste configs containing secrets, environment references, or internal endpoints. A side-by-side view lets you confirm the round-trip is lossless before committing the result to your repository.
How to Use
- Open the JSON to YAML tool
- Select the source and target formats
- Adjust the output options as needed
- Click the Convert button; results appear in real time
- Copy or export the result
Use Cases
- Write K8s configs — Turn JSON config from an API into indented YAML to paste straight into a Deployment or ConfigMap.
- Migrate CI pipelines — Convert legacy JSON build config into the YAML required by GitHub Actions or GitLab CI.
- Make configs readable — Convert verbose single-line JSON to YAML for easier line-by-line review.
- Reverse validation — Convert hand-written YAML back to JSON to verify indentation and catch hidden type errors.
- Documentation examples — Show both JSON and YAML forms in docs to suit readers with different habits.
- Kubernetes manifest — Convert JSON deployment specs to YAML for Kubernetes manifest files that are easier to read and diff.
- Ansible variable prep — Transform JSON variable definitions into Ansible-compatible YAML syntax for playbook configuration.
FAQ
Must YAML indentation use spaces?
Yes. The YAML spec forbids tab indentation; this tool always emits 2 spaces. If your YAML errors, check for stray tabs first.
Are comments preserved?
JSON has no comments, so JSON→YAML carries none; YAML→JSON drops comments because the target format cannot hold them.
How are multi-line strings handled?
Longer multi-line text is emitted using YAML block scalars (| or >) to keep line breaks readable.
Does key order change after conversion?
No. Original insertion order is preserved — no alphabetical sorting — so you can compare against the source.
Will values like on or yes become booleans?
Possibly. YAML 1.1 treats on/off/yes/no as booleans; keep them quoted in the source if the value is genuinely that literal text, then verify after conversion.
What about converting to TOML?
Use our JSON to TOML or YAML to TOML tools, which also run locally with lossless conversion.