JSON to YAML Converter — Convert Between JSON and YAML
Convert JSON to YAML and YAML to JSON instantly. Free online converter for config files, APIs, and data interchange.
JSON and YAML represent the same data structures but with different syntax. JSON is strict and machine-friendly; YAML is readable and human-friendly. The MyPDF JSON/YAML Converter translates between the two formats instantly, preserving data types, nesting, and arrays.
How to Convert JSON to YAML (or Back)
- Paste or upload — Drop a JSON or YAML file, or paste the content directly.
- Choose direction — Select JSON to YAML or YAML to JSON.
- Copy or download — Copy the converted output or download it as a file.
JSON vs YAML
| Feature | JSON | YAML |
|---|---|---|
| Readability | Moderate | High (no braces, minimal punctuation) |
| Comments | Not supported | Supported (#) |
| Data types | Strings, numbers, booleans, null, arrays, objects | Same + dates, multi-line strings |
| Strictness | Strict (commas, quotes required) | Flexible (indentation-based) |
| Common use | APIs, package.json, tsconfig | Docker Compose, Kubernetes, CI/CD |
Practical Tips
- Convert CI/CD configs for debugging. YAML configs (GitHub Actions, Docker Compose) can be hard to debug. Convert to JSON to validate structure, then convert back.
- Preserve comments manually. JSON does not support comments. If your YAML contains comments, they will be lost during conversion. Add them back after converting to YAML.
- Validate before converting. Invalid YAML (bad indentation, tab characters) will cause conversion errors. Fix syntax issues first.
Does the converter handle nested structures?
Yes. Deeply nested objects, arrays of objects, and mixed types are all handled correctly in both directions.
Will converting to JSON and back produce identical YAML?
The data will be equivalent, but formatting may differ. YAML allows multiple valid representations of the same data (flow vs block style, quote styles), so the output may not be character-identical to the original.
Can I convert multi-document YAML files?
YAML supports multiple documents separated by ---. The converter processes each document and outputs a JSON array containing all documents.
Related Tools
- JSON to XML — Convert between JSON and XML formats.
- JSON Beautify — Format and prettify JSON data.
- JSON Minify — Compress JSON by removing whitespace.
- Text Diff — Compare config files side by side.