YAML to JSON

Free online YAML to JSON converter. Paste YAML in the browser and copy formatted JSON. Conversion stays on the device. There is no account and no payment.

You can also switch the editor to JSON → YAML.

Scripts

npm install
npm run dev
npm run build
npm run start

Site URL

The canonical origin is SITE_URL in lib/site.ts. Production is https://yaml-to-json.com (no trailing slash).

That constant feeds metadataBase, canonical links, Open Graph and Twitter URLs, JSON-LD, robots.txt, and sitemap.xml. *.vercel.app hosts are deploy previews only and must not become the canonical origin.

Deploy on Vercel

1. Import this repository. Framework preset: Next.js.
2. No environment variables are required.
3. Build command: npm run build. Output is the default Next.js build.
4. Bind yaml-to-json.com (apex) as production. Keep SITE_URL as https://yaml-to-json.com.

Pasted YAML and JSON are parsed in the browser. There is no API route that receives editor contents.

Stack

Next.js 15 App Router, React 19, TypeScript, and the yaml package.