JSON ↔ YAML Converter

Switch between JSON and YAML in one click — paste either format to convert it.

JSON → YAMLYAML → JSON

InputOutput

How it works

1
Paste your input into the editor.
2
Choose format / mode options if available.
3
Copy the transformed output (it usually updates as you edit).

Why use this tool

Runs entirely in your browser — nothing is uploaded to a server.
100% free, no sign-up, no limits.
Works in any modern browser — no app install, no extension, no account.

JSON and YAML for config files

YAML is common for config files like Docker Compose and Kubernetes, while JSON dominates APIs. This tool converts between both formats while preserving data types.

How to use JSON ↔ YAML Converter

Paste into JSON ↔ YAML Converter, tweak options, and copy the output. Formatting and conversion run in the browser for this tool.

Tips for better results

Keep a backup of original input before bulk transforms. Invalid input should show an error instead of silent corruption.

Privacy and offline-friendly processing

Whenever possible, JSON ↔ YAML Converter processes your data locally with JavaScript in this page. That means drafts, secrets, and unfinished work stay on your device by default. Prefer this workflow when you do not want to upload sensitive text, tokens, passwords, or files to a third-party service.

Frequently asked questions

Are comments preserved when converting YAML to JSON?

No, JSON has no comment syntax, so YAML comments are dropped during conversion.

Does it support multi-document YAML?

Only single-document YAML is supported; the first document is used.

Is my data uploaded when I use this tool?

For most FlyUtils tools, no. Processing happens in your browser with JavaScript. If a tool ever needs a server, that will be stated clearly on the page.

Is JSON ↔ YAML Converter free to use?

Yes. JSON ↔ YAML Converter is free, with no sign-up and no artificial usage caps for normal personal and work use.

Does JSON ↔ YAML Converter work on mobile?

Yes. The page is mobile-first, so you can paste input, tweak options, and copy results from a phone or tablet.