Convert tools

JSON Merge Patch

Apply a JSON Merge Patch to a document and preview the merged result.

Convert in your browser · No sign-up

RFC 7396: null deletes a property, arrays replace whole arrays, and a non-object patch replaces the document. No prototype properties are executed.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

How to use

  1. Apply a JSON Merge Patch to a document and preview the merged result.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

{"a":1,"b":2} + {"b":null} → {"a":1}

Details and limitations

RFC 7396: null deletes a property, arrays replace whole arrays, and a non-object patch replaces the document. No prototype properties are executed.

Text stays in your browser; it is not sent to a conversion server.

FAQ

JSON Merge Patch — What are the supported inputs and limits?

RFC 7396: null deletes a property, arrays replace whole arrays, and a non-object patch replaces the document. No prototype properties are executed.

Format references

Tool page updated: