JSON to YAML & YAML to JSON — Free Converter
Convert JSON to YAML and YAML to JSON for free online. Bi-directional, browser-based. No signup required, your data stays private.
Convert JSON to YAML and YAML to JSON in one click — both directions, one tool. PDFFlare's YAML converter uses js-yaml under the hood for full YAML 1.2 compatibility (mappings, sequences, multi-line strings, anchors, the works).
Need to clean up the JSON before converting? JSON Formatter validates and pretty-prints. Need a CSV instead? JSON to CSV handles arrays of flat objects.
How to Convert JSON to YAML (and YAML to JSON)
Pick a direction
JSON → YAML (default) for a Kubernetes/Helm-style YAML, or YAML → JSON to read a YAML config as JSON.
Paste your data
Paste JSON or YAML into the input pane. Both formats are validated as you click Convert.
Convert and copy
Click Convert to see the result; copy with one click, or use ⇄ Swap to round-trip.
When Do You Need a JSON / YAML Converter?
Kubernetes manifests: You have a JSON-based tool (kubectl with `-o json`, tooling-generated specs) and need YAML for human review or git-tracked config.
CI/CD configs: GitHub Actions, GitLab CI, Bitbucket Pipelines all use YAML. Convert a JSON workflow definition to drop straight into a `.github/workflows/*.yml` file.
OpenAPI / Swagger: The spec supports both formats. Convert a JSON spec to YAML for diff-friendly review, or vice versa for tooling that prefers JSON.
Helm charts: Helm values often start life as JSON from a default-config dump. Convert to YAML to ship in `values.yaml`.
Why Use PDFFlare for JSON ↔ YAML?
Full YAML 1.2 Support
Built on js-yaml, the same parser most Node.js tools use. Multi-line strings, anchors, aliases, and the full type system all work.
Both Directions
One tool, two-way conversion, with a swap button to keep working with the result in either format.
100% Browser-Based
Configs and secrets stay on your device. No server uploads — safe for production manifests.
No Signup Required
No account, no rate limits. Just paste, convert, copy.
Frequently Asked Questions About JSON to YAML
YAML is the standard config format for Kubernetes, GitHub Actions, Docker Compose, and most modern config-as-code tools. Converting JSON API responses or schemas to YAML is the fastest way to ship them as configs.
JavaScript and most APIs speak JSON natively. Converting a YAML config to JSON lets you use it from JS, send it as an API body, or feed it into JSON-only tools.
No — JSON has no concept of comments, so YAML → JSON loses any. JSON → YAML output is comment-free; you can add comments back manually after conversion.
The converter uses js-yaml under the hood, supporting the YAML 1.2 standard: mappings, sequences, scalars, multi-line strings, anchors and aliases (resolved during parse), and the standard set of types.
When parsing YAML → JSON, anchor references are resolved (so a referenced node becomes a real value). Going JSON → YAML produces explicit value duplicates rather than anchors, since JSON has no anchor concept.
No. The conversion runs entirely in your browser via js-yaml. Your configs and data never leave your device — safe for production secrets or sensitive payloads.
Yes. Invalid YAML or invalid JSON is caught before conversion, and the error message points at the line and column of the problem so you can fix it without guesswork.
Yes — paste the YAML manifest, convert to JSON, edit programmatically, then convert back to YAML for kubectl apply. Anchors get expanded and comments are lost, so review the diff before applying to a cluster.