🔍 JSON Diff - Compare JSON Online

JSON Diff is a tool that compares two JSON objects and shows you the differences. It highlights what's been added, removed, or changed between the two JSON structures, making it easy to spot discrepancies in API responses, configuration files, or data exports.

Paste your first JSON into the left panel (JSON 1), paste the second JSON into the right panel (JSON 2), and click "Compare JSON". The tool will instantly show you all differences with color-coded highlighting.

Yes, absolutely. All comparison happens locally in your browser using JavaScript. Your JSON data is never uploaded to any server, stored, or transmitted. Once you close the browser tab, everything is gone.

Yes, the tool can handle reasonably large JSON files (up to several MB). For extremely large files (10MB+), performance may vary depending on your browser and device capabilities.

Green highlights indicate added properties or values (present in JSON 2 but not JSON 1). Red highlights show removed properties (present in JSON 1 but not JSON 2). Yellow highlights mark changed values (property exists in both but has different values).

Yes, the tool performs deep comparison of nested objects and arrays. It will traverse the entire JSON structure and highlight differences at any level of nesting.

If either JSON input is invalid, you'll see an error message explaining which JSON has syntax errors. Make sure both inputs are valid JSON before comparing. Common issues include missing commas, unquoted keys, or trailing commas.

Yes, you can compare JSON arrays. The tool will compare arrays element by element and show which items were added, removed, or modified. Array order matters in the comparison.

Once the page loads, all comparison functionality works offline since everything runs in your browser. However, you need an internet connection to initially access the page.

Yes, you can select and copy the diff output directly from the results panel. The differences are displayed in a readable format that you can paste into documentation or reports.

The tool supports all standard JSON features including objects, arrays, strings, numbers, booleans, null values, nested structures, and Unicode characters. It follows the official JSON specification.

JSON Diff understands JSON structure and compares semantic differences, not just text differences. It ignores formatting and whitespace changes, focusing on actual data differences. A property reordered is considered identical, while text diff would flag it as different.

Absolutely! Developers commonly use JSON Diff to compare API responses before and after code changes, verify endpoint outputs match expectations, or debug differences between staging and production environments.

Yes, the tool correctly handles Unicode characters, emojis, escaped characters, and special symbols in JSON strings. All valid JSON characters are properly compared.

Works on all modern browsers including Chrome, Firefox, Safari, Edge, and Opera on both desktop and mobile devices. Requires JavaScript to be enabled.

Yes, you can paste JSON from any source - API responses, database exports, configuration files, log files, or manually typed JSON. The source doesn't matter as long as it's valid JSON.

There's no hard limit, but very large JSON files (10MB+) may slow down comparison depending on your device's memory and processing power. For most use cases (under 5MB), comparison is instant.

Yes, if your JSON contains string values, the tool will compare them character by character and highlight any differences. Strings are compared as exact matches (case-sensitive).

No, object property order doesn't matter in JSON comparison. {"a":1,"b":2} is considered identical to {"b":2,"a":1}. However, array element order does matter since arrays are ordered collections.

Yes, JSON Diff is perfect for comparing configuration files before and after changes. Many config files (package.json, tsconfig.json, settings.json) use JSON format, making this tool ideal for tracking what changed between versions.