ToolPad
Runs locally in your browser. Nothing you paste is sent to a server.

JSON Diff

Compare two JSON blocks by normalizing and formatting both sides consistently. Useful for spotting differences before using a visual diff. Runs locally in your browser.

Input

0 chars

Output

0 chars

Tip: You can verify in DevTools → Network that nothing is uploaded.

About this JSON Diff

JSON Diff parses two JSON blocks and outputs a normalized representation of each side so differences become easier to spot.

For a visual highlighted diff, you can copy the normalized output into Text Compare. This tool focuses on getting both JSON inputs into a consistent format first.

Common uses
  • Process text data quickly without external tools
  • Transform content for development workflows
  • Clean and format text for analysis
Tips
  • Enable Auto to transform as you type
  • Upload text files directly from your device
  • Download the result when done

FAQ

Is my text uploaded to a server?

No. Everything runs locally in your browser. Nothing you paste is sent to a server.

Can I use this tool offline?

After the page loads once, it will typically keep working offline (unless you hard refresh with no cache).

Do you store my input?

No. Your input stays in your browser. Only optional preferences like theme or language may be stored.

What input formats are supported?

Any plain text. You can paste text directly into the input box.

How do I provide two JSON inputs?

Paste two JSON blocks separated by a blank line. The tool will parse and format both sides.

Does this highlight differences automatically?

This version normalizes both sides for easier comparison. Use Text Compare for a highlighted diff view.

What happens if one side is invalid JSON?

Parsing will fail and you'll see a JSON error. Fix invalid JSON first, then compare again.