Private, ad-free JSON workspace
Compare two JSON inputs side by side to understand what changed between API responses, configuration files, test fixtures, or saved states. The compare workspace is designed for fast debugging without uploading data.
{
"name": "Ada",
"plan": "free",
"seats": 1
}{
"name": "Ada",
"plan": "pro",
"seats": 5
}The same object before and after a change. Compare highlights the fields that moved.
A JSON diff walks both documents key by key and index by index. It reports three things: keys that exist in one side but not the other, values that differ for the same key, and array items that were added or removed. Because it compares structure rather than raw text, a reordered object with the same keys and values is not treated as a wall of differences.
That structural view is why comparing JSON beats a plain text diff for this job. A text diff flags every shifted line when indentation changes, while a JSON diff cares about the data itself.
Comparing two API responses shows exactly what a release changed. Comparing a local config against production surfaces the one setting that is off. Comparing a saved fixture against fresh output tells you whether a test needs updating or whether something actually regressed.
Both JSON inputs are compared in your browser, so private responses and config values stay local.
Yes. Import the JSON files into the compare workspace to review differences side by side.
Comparison is structural, so two objects with the same keys and values are treated as equal even if the keys appear in a different order.
Yes. The comparison runs in the browser, so the JSON does not need to leave your device.
Yes. The diff walks into nested objects and arrays and reports changes at the level where they happen.
Use the formatter to make one JSON document readable. Use compare when you need to see what changed between two JSON documents.