YAML to JSON Converter

Convert Between YAML and JSON — Live, in Your Browser

Paste YAML to get JSON, or paste JSON to get YAML. The output updates as you type, and if the input is malformed you get a plain-English parse error with the exact line and column instead of a silent failure. Pick 2-space, 4-space, or tab indentation, optionally sort keys alphabetically, then copy or download the result.

Everything runs locally with the js-yaml parser — nothing is uploaded, there is no sign-up, and there is no daily limit. That matters more here than for most converters: YAML config files routinely hold API keys, database URLs, and tokens, and a tool that POSTs your text to a server is a genuine leak risk. This one never sends a byte off your device.

One honest caveat: converting between the two formats is lossy exactly where the formats differ. Comments are stripped (JSON has none), YAML anchors and aliases are expanded into plain values, and key order can change if you turn on sorting. Your data round-trips faithfully; the surrounding annotations do not.

Common Use Cases

• Kubernetes & Docker: Turn a JSON snippet into a clean YAML manifest, or read a dense values file as structured JSON.
• CI/CD pipelines: Convert GitHub Actions, GitLab CI, or CircleCI YAML to JSON to inspect or diff it programmatically.
• API work: Move between a JSON request body and a YAML fixture without hand-editing indentation.
• Config migration: Port app settings from a .json file to .yaml (or back) when switching tools or frameworks.
• Learning & debugging: Paste tricky YAML to see exactly how it parses — catch a stray tab or bad indent before it breaks your build.
• Multi-document streams: Flatten a YAML file with several --- documents into a single JSON array.

Privacy: This tool runs entirely in your browser. Your YAML and JSON are parsed on your own device and never leave it — no upload, no logging, no server.