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JSON Deep Merge

Deep-merge two JSON objects locally with predictable object rules.

◉ 100% Free⚡ Local Processing◈ Browser Tool

✨ Choose File & Process

Nested objects are merged recursively. Arrays and primitive values from the override document replace the base value.
🔒 Files stay in your browser
⚡ Runs in your browser
⬇ Clear downloadable output

📖 How to use

  • Choose the required input file or content.
  • Set the available options when shown.
  • Run the main action and let the browser process it.
  • Download and review the generated result.

⚡ Features

  • Free browser-based workflow.
  • No account required.
  • Focused controls for this task.
  • Responsive desktop and mobile layout.

💡 Pro Tips

  • Keep the original file as a backup.
  • Use a modern browser for best compatibility.
  • Review the generated result before sharing it.
  • Large files can take longer to process.