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JSON Merge Patch

JSON Merge Patch (RFC 7396) describes JSON updates with merge semantics: patch fields overwrite same-named target fields, and null deletes a field.

Purpose

To provide simpler merge-update semantics than JSON Patch for plain overwrite scenarios that need no move/copy.

Mechanism

Recursive merge: fields in the patch overwrite same-named target fields; a null patch field deletes the target field; when both patch and target are objects they merge recursively, otherwise the patch replaces the target.

Use cases

  • HTTP MERGE requests
  • Simple JSON updates
  • Configuration overrides

Related tools

JSON Formatter
Format, minify, or sort JSON online. Free, private, and 100% client-side.
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JSON Validator
Validate JSON and pinpoint syntax errors by line and column. Free, private, and 100% client-side.
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References