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JSON Merger
Deep-merge multiple JSON objects with configurable array handling.
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No uploadsYour files stay on this device.
Local engineYour browser does the work.
Auto cleanupTemporary memory is released.
About this tool
Use json merger without uploading files
Deep-merge multiple JSON objects with configurable array handling. JSON Merger runs in the current browser session, giving you a direct result without sending the source to a Filemazing processing server.
Processing takes place in your browser tab. Temporary working data is released when you leave or reload the page.
Three steps
- Choose the source items you want to combine with JSON Merger.
- Confirm their order and any options that control how they are joined.
- Create the combined result, inspect it, and download the new file.
Useful for
Common merge json tasks
- Using merge json without an upload queue
- Cleaning private exports
- Preparing structured data imports
Practical details
What to know before you start
One combined file created by JSON Merger
- Keep an untouched source export so transformed rows can be audited.
- Inspect identifiers, dates, delimiters, and blank values before importing the result.
- Review the JSON Merger result before using it in an important workflow.