JSON to YAML Converter
Paste JSON on the left, get clean YAML on the right. Everything runs in your browser — nothing is uploaded, nothing is saved. The same engine powers our main editor.
How to use this tool
Paste your JSON into the input box on the left. You can also edit the default sample to try it out.
The YAML output is generated instantly on the right as you type — no buttons to press, no waiting.
Use the Copy button to grab the converted YAML and paste it into your Kubernetes manifest, CI config, or any other YAML-based tool.
YAML is a superset of JSON that uses indentation instead of braces and quotes, making it popular for configuration files. This converter handles nested objects, arrays, strings, numbers, booleans, and null values.
Because the conversion happens entirely in your browser, you can safely convert JSON containing credentials, API keys, or internal configuration data without any of it touching a server.
Frequently asked questions
Is this JSON to YAML converter safe to use with sensitive data?
Yes. The conversion runs 100% in your browser using the battle-tested js-yaml library. Your JSON is never transmitted to any server, never logged, and never stored. There is no backend to leak it. You can verify this by opening your browser DevTools Network tab while converting.
What JSON constructs are supported?
All standard JSON is supported: objects, arrays, strings (including unicode and escapes), numbers, booleans, and null. Nested structures of any depth are preserved. The output follows YAML 1.2, which is a strict superset of JSON.
Why would I convert JSON to YAML?
YAML is more human-readable than JSON for configuration files. Kubernetes manifests, Docker Compose files, GitHub Actions, Ansible playbooks, and CI pipelines all use YAML. Converting API responses or JSON configs to YAML makes them easier to hand-edit.
Can I convert YAML back to JSON?
Yes — use our YAML to JSON converter. Both directions are fully supported and run client-side.
Is there a file size limit?
There is no server-imposed limit since nothing is uploaded. Practical limits come from your browser memory; documents up to several megabytes convert in well under a second.