Helpful Toolbox

YAML to JSON Converter

Paste YAML or JSON, click a button, and get a clean conversion the other way — right here in your browser.

📖 How it works & FAQ

What this converter does

This tool converts data between two of the most common configuration formats: YAML and JSON. YAML (YAML Ain't Markup Language) is prized for being human-readable, using indentation and minimal punctuation, so it shows up everywhere from Docker Compose files to GitHub Actions workflows and Kubernetes manifests. JSON (JavaScript Object Notation) is the lingua franca of APIs and JavaScript apps, with strict brackets and quotes that machines love. Moving between them by hand is tedious and error-prone, so this converter does it in one click — in both directions.

Why convert in the browser

Everything runs locally using the trusted js-yaml library. Your data never leaves your device — nothing is uploaded to a server, which matters when you're pasting API keys, environment variables, or internal config. That also means it's fast and works even if you lose your connection after the page loads. The result is valid, properly indented output you can paste straight back into your project.

How to use it

  1. Paste your YAML or JSON into the input box at the top.
  2. Click YAML → JSON to turn YAML into JSON, or JSON → YAML to go the other way.
  3. Read the converted output in the result box below.
  4. If your input has a syntax mistake, a clear red error message pinpoints what went wrong so you can fix it.
  5. Click Copy result to grab the output, or Clear to start over.

FAQ

Is my data safe and private?
Yes. All conversion happens in your browser with JavaScript. Nothing you paste is ever sent to a server or stored.
Why did I get an error message?
The error means your input isn't valid YAML or JSON. Common causes are inconsistent indentation, tabs instead of spaces in YAML, or a missing comma or quote in JSON. The message describes the problem and often the line.
Does it keep comments and key order?
Key order is preserved. YAML comments are dropped, because JSON has no concept of comments and they can't survive the round trip.
Can it handle nested objects and arrays?
Absolutely. Deeply nested structures, lists, booleans, numbers, and null values all convert correctly in both directions.