JSON Diff

How to Use the JSON Diff Tool

Paste two JSON documents into the left and right panels, then click the play button to compare them. Differences are highlighted side by side so you can see exactly which keys changed, were added, or were removed.

Use it when debugging API responses, reviewing configuration changes between environments, or checking what a teammate modified in a shared data file. Click the indent button to format both sides before comparing.

Tip: the tool respects key order. If your documents are semantically identical but ordered differently they will still show changes. Sort keys on both sides first if you only care about values.

When comparing large configs, start by formatting both sides to expose structural differences, then look at the diff output from top to bottom. Pair the tool with a JSON validator: validate first, diff second, to avoid noise from syntax errors.

The tool is fully client-side - your JSON is never uploaded, so it is safe for internal configuration files that contain server names or endpoints.