Skip to content
ToolSuite
JSON, XML & YAML Tools

YAML Merge Tool

Merge two YAML documents, with the second overriding the first.

Processed in your browser

Fill in the form and press “Merge” to see the result here.

How to use it

  1. 1Paste your document into the input box, or type it directly.
  2. 2Adjust the options if you need something other than the defaults.
  3. 3The result updates as you type.
  4. 4Copy the result to your clipboard or download it as a file.

About the YAML Merge Tool

Mappings merge key by key at every depth and the second document wins; sequences are replaced whole. That matches how Helm values, Docker Compose overrides and most configuration layering systems behave.

Questions people ask

Is your document uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your document never leaves your device. You can confirm it by opening your browser's network panel while the tool runs, or by disconnecting from the internet after the page has loaded.

Is it free, and do I need an account?

Yes, it is free, and there is no account, no sign-up and no watermark on the result. The project is funded by optional donations.