Handitab

JSON Compare

Compare two JSON documents after formatting both and sorting their keys, so only real value differences show up, not key order.

About JSON Compare

A diff checker is a tool that compares two versions of a text and marks what changed. This one compares line by line using a longest common subsequence (LCS) algorithm: lines only in the original are marked with a minus, lines only in the new text with a plus. Options ignore edge whitespace and letter case. It does not highlight changes within a line, and the inputs are limited to roughly 2,000 lines per side.

Also known as: JSON Diff.

How to use JSON Compare

  1. Type or paste into the "Original text" box and the "Changed text" box, or press "Use example" to try it with sample data.
  2. Set "Ignore whitespace at line edges" and "Ignore letter case" if the defaults do not fit.
  3. The result appears below and updates as you type.
  4. Copy the result with the copy button, or download it as a file where that is offered.

Questions about JSON Compare

Why is a whole line marked as changed when I edited one word?

The comparison works on full lines. Any difference inside a line makes it count as one removed line and one added line. Character-level highlighting within a line is not available.

How does the JSON comparison ignore key order?

Both inputs are parsed, object keys are sorted alphabetically at every level, and the result is re-indented with two spaces before the line comparison. Array order is kept, because order is significant in JSON arrays.

Runs in your browser. Page last updated .

More developer tools

All 41 developer tools
JSON FormatterFormat and validate JSON with 2-space, 4-space, or tab indentation, sort keys alphabetically, and see the position of any syntax error.JSON MinifierMinify JSON by removing all whitespace and line breaks, producing a single-line document that is valid and smaller to send or store.JSON Schema GeneratorGenerate a JSON Schema (draft 2020-12) from a sample JSON document, with inferred types, nested properties, and required key lists.JSON to TypeScriptGenerate TypeScript interfaces from a sample JSON document, with nested objects turned into separate named interfaces and typed arrays.JSON Tree ViewerView JSON as a collapsible tree: expand and collapse objects and arrays, see item counts, and spot the type of every value by color.Markdown Table GeneratorTurn CSV, TSV, or spreadsheet cells pasted from Excel into a Markdown table with aligned columns and a choice of text alignment.