YAML ↔ JSON Converter
Convert YAML to JSON (for APIs, JS apps) or JSON to YAML (for Kubernetes, Docker Compose, GitHub Actions). Powered by js-yaml — handles YAML 1.2 with anchors, multi-line strings, all standard data types.
What powers the YAML ↔ JSON Converter
Bidirectional — YAML ↔ JSON
Powered by js-yaml (most-used YAML parser, 3M+ weekly downloads)
YAML 1.2 spec compliance
Anchors, references, multi-line strings supported
Pretty-print toggle for JSON output
Live error reporting
Instant
Why the YAML ↔ JSON Converter is different
Browser-native
The YAML ↔ JSON Converter runs entirely in your browser. Input is processed locally — never uploaded, never logged, never cached anywhere outside your device.
No artificial limits
No daily quotas, no character ceilings, no "upgrade for more" walls. Every feature is the complete feature — the same on the first use as the thousandth.
Production-grade quality
Built to the same engineering bar as paid SaaS tools — accurate algorithms, audited logic, responsive design and accessibility-tested interactions.
Common use contexts
- Converting an OpenAPI YAML spec to JSON for tooling
- Translating a Postman JSON collection to YAML
- Converting Kubernetes JSON manifest to YAML for readability
- GitHub Actions / GitLab CI debugging
Private and secure
Zero upload
All processing happens in your browser. Input is never transmitted, logged or cached.
Works offline
Once the page loads, the tool runs without an internet connection. No network calls happen during use.
No tracking
No accounts, no cookies for tool state. Only aggregate analytics count visits at the page level.