Is my data uploaded to a server?

No. Every operation runs inside your browser using JavaScript. Nothing you paste or open is sent to our servers, stored or logged. You can disconnect from the network after the page loads and the tool keeps working.

What happens to YAML dates and other non-JSON types?

They stay as strings. The converter deliberately reads YAML with the core schema, which produces only types JSON can represent, rather than building date objects that have no JSON equivalent.

YAML to JSON

This tool runs entirely inside your browser, so it needs JavaScript enabled. Nothing you paste is ever sent to a server.

Frequently asked questions

Is my data uploaded to a server?: No. Every operation runs inside your browser using JavaScript. Nothing you paste or open is sent to our servers, stored or logged. You can disconnect from the network after the page loads and the tool keeps working.
What happens to YAML dates and other non-JSON types?: They stay as strings. The converter deliberately reads YAML with the core schema, which produces only types JSON can represent, rather than building date objects that have no JSON equivalent.

Stuck on an error?

Every common JSON parse error is explained separately, with the cause and the fix: common JSON errors.

How your data is handled

Everything happens on your device. There is no upload, no storage and no logging, and only your interface preferences - theme, indentation, font size and word wrap - are kept between visits. Closing the tab clears the document.

Frequently asked questions

Related tools

Stuck on an error?

How your data is handled