JSON to YAML Converter — Free, No Upload
Overview
Many CI/CD tools and infrastructure platforms prefer YAML over JSON — it is easier to comment, diff, and version-control. If you have a JSON config (tsconfig.json, an OpenAPI spec, a Terraform output) and need a YAML equivalent, paste it here. The converter produces properly indented YAML with 2-space indentation and 120-character line wrapping.
How to Use This Tool
Paste your JSON into the input panel, or drop a .json file. The tool detects JSON input automatically and switches to JSON → YAML mode. Copy the YAML output or download it as a .yaml file. Click Swap to convert back if you need to verify round-trip fidelity.
Ready to get started? It's free, no registration required, and your files never leave your device.
PDF Tool →Frequently Asked Questions
Does the JSON to YAML converter preserve key order?
JavaScript objects do not guarantee key order, but V8 (the engine behind Chrome and Node.js) preserves insertion order for string keys in practice. For large production configs where order matters, verify the output before committing.
How are JSON arrays converted to YAML?
JSON arrays become YAML sequences using the dash-space (- item) block style by default. Scalar arrays like [1, 2, 3] may appear as flow sequences on one line if they are short enough to fit within the 120-character line width.
Can I convert an OpenAPI JSON spec to YAML?
Yes. Paste the full OpenAPI JSON (even large specs with hundreds of paths) into the input panel. The output is valid YAML that tools like Swagger UI and Redoc accept directly.