Convert JSON to YAML
Paste JSON, press Convert and copy the YAML from the console pane. Invalid JSON is reported with the parser's error message so you can fix it first. Useful for Kubernetes manifests, GitHub Actions workflows and Docker Compose files.
Frequently asked questions
Is my data uploaded?
No. Conversion happens in your browser with the open-source js-yaml library.
Related tools
- Pine compilerCheck, run and chart v4 · v5 · v6 scripts in your browser — nothing to install, nothing uploaded.
- PythonPython 3 via WebAssembly — runs on your device.
- JavaScriptSandboxed Web Worker with top-level await.
- TypeScriptTranspiled by the real TypeScript compiler, then executed.
- SQL (SQLite)A real SQLite engine in WebAssembly — fresh database every run.
- YAML → JSONCatches indentation errors, outputs formatted JSON.
- JSON formatterPretty-print and validate in one step.
- Markdown → HTMLRendered preview plus the HTML source.