Free tool · 🔀 YAML ↔ JSON converter
YAML to JSON,JSON to YAML, validated.
Indentation errors cost hours in Kubernetes and Compose files. Paste, validate, convert, copy — with the exact line of any problem.
Multi-document YAML (---) converts to a JSON array. Anchors and aliases are resolved.
What it checks
Everything we would look at first on a client call.
Free, no sign-up, no email gate. If the report shows red, the fix is written next to it — and we are one click away if you would rather we did it.
- Auto-detects input format
- Validation with line/column on errors
- Multi-document YAML support
- Pretty or minified JSON output, copy and download
FAQ
Common questions
My YAML is valid but Kubernetes rejects it.
Valid YAML ≠ valid manifest. Use kubectl apply --dry-run=client -f file.yaml, or our Kubernetes manifest generator for a correct skeleton.
Tabs or spaces?
YAML forbids tabs for indentation. This tool flags them.