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 seconds.
About JSON to YAML
JSON is great for machine transport, while YAML — with its indentation syntax and comment support — is preferred for human-written config files (Kubernetes, GitHub Actions, Docker Compose). This tool converts between JSON and YAML entirely in your browser, handling nested objects, arrays, multi-line strings, and escaping automatically. Nothing is uploaded, so it is safe to paste configs containing secrets. Tip: Bookmark this tool for quick access whenever you need format conversion. All processing happens locally in your browser — no data upload, so feel free to paste sensitive content.
How to Use
- Open the JSON to YAML tool page
- Enter or paste your data into the input area
- View the real-time results and use the copy button to get the output
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.
What about converting to TOML?
Use our JSON to TOML or YAML to TOML tools, which also run locally with lossless conversion.
Any browser compatibility requirements?
This tool works in all modern browsers (Chrome, Firefox, Edge, Safari). No plugins or extensions required.
Can I use it offline?
After initial load, most features work offline. The core logic runs entirely in your browser with no network dependency.
Comments
Comments are stored locally in your browser. Configure Giscus for cloud-based comments.