YAML JSON Converter
Convert YAML to JSON or JSON to YAML in your browser with js-yaml—validate syntax, copy results, and download output files.
Result
Tips
Validate first
Use Validate to catch indentation or syntax issues before converting.
Tabs vs spaces
YAML is indentation-sensitive. Mixed tabs and spaces often cause parse errors.
JSON output formatting
YAML→JSON output is pretty-printed with two-space indentation for readability.
Sensitive configs
Because conversion is client-side, secrets in YAML are not sent to Toolomix—but still avoid pasting production credentials on shared machines.
Bidirectional conversion
Switch between YAML→JSON and JSON→YAML.
js-yaml powered
Parsing and dumping use js-yaml from CDN in your browser.
Validate and export
Check syntax, copy output, or download .json / .yaml files.
What this tool does
YAML JSON Converter turns YAML configuration or data files into JSON and serializes JSON back to YAML.
It is useful for Kubernetes manifests, CI configs, and API payloads when you need the other format quickly.
How to use
Pick direction
Choose YAML→JSON or JSON→YAML.
Paste and validate
Add your text and optionally run Validate to confirm syntax.
Convert and save
Convert, then copy or download the result.
Processing and privacy
Conversion uses js-yaml loaded from CDN and executes entirely in your browser.
No YAML or JSON content is posted to Toolomix servers.
Limitations
Known limits
- Single-document YAML per conversion
- Very large configs may hit browser memory limits
- Custom YAML tags may not round-trip exactly
- Pasted text workflow—no file batch processing
Frequently Asked Questions
Is my YAML uploaded?
No. js-yaml runs in your browser. The text you paste is not sent to Toolomix for conversion.
Does it support multi-document YAML?
This tool converts a single YAML document at a time. Multi-document streams may need to be split manually.
What happens with anchors and aliases?
js-yaml resolves references when loading. Dumped JSON reflects the resolved structure.
Can I validate JSON too?
Yes. When direction is JSON→YAML, Validate checks JSON.parse on your input.
Why did YAML fail to parse?
Common causes are bad indentation, tabs mixed with spaces, or unquoted special characters. The error message points to the problem area.
Can I download the converted file?
Yes. After conversion, use Download to save converted.json or converted.yaml.
Try Other Free Tools
Try it now
Paste config or API data, validate, and convert without uploading.
