JSON Diff Guide

When an API response or configuration changes, comparing two walls of text is tiring. JSON Diff reads both pieces of JSON and points to values that were added, removed, or changed.

Compare two tiny objects

Paste {"user":{"name":"Ana","active":true}} in Original JSON. Paste {"user":{"name":"Ana","active":false}} in Changed JSON, then choose Compare.

You should see a line starting with ~ user.active: true → false. Read it like this: inside user, the value named active changed from true to false. The ~ means changed. If a value exists only on the right, it starts with +; if it exists only on the left, it starts with -.

Now set active to true on both sides. Reverse the order of name and active on the right, but leave their values alone. Choose Compare again. The result should say Identical: moving names around in a JSON object did not change the data.

If the result surprises you

Check which side you put into each box: left is original, right is changed. Both must be valid JSON; a missing quote or comma produces an error instead of a partial comparison. This tool compares array items by their positions, so moving a list item may look like several changes. It shows differences; it does not merge files or decide which version is correct.

Where your input goes

Processing runs in your browser. The tool does not upload your input to ilham.dev.

Related guide

For more background, read Working With Structured Data.