tofo-boxtools

Flatten JSON

developer

Flatten nested JSON objects into a single-level object with dot-notation keys.

flatten jsonjson flatten onlinenested json to flatflatten nested json objectjson dot notation converterflatten json free
JSON

Options

Character used to join nested keys

🖼️
Image Tool

Try Image Compressor

Reduce image size up to 80% — free, instant, no upload needed.

→

How to Use Flatten JSON

  1. 1

    Paste or type your JSON into the input field.

  2. 2

    Adjust any available options in the Options panel.

  3. 3

    Click "Run Flatten JSON" to process.

  4. 4

    Copy or download the result from the output panel.

Frequently Asked Questions

Is Flatten JSON free to use?

Yes, Flatten JSON is completely free. No account or signup is required.

Are my files stored on your servers?

No. This tool runs entirely in your browser — your files never leave your device.

What file types are supported?

This tool supports: flatten json, json flatten online, nested json to flat, flatten nested json object, json dot notation converter, flatten json free, json object flattener, convert nested json to flat online.

Can I use this tool on mobile?

Yes, the tool is fully responsive and works on any modern browser including mobile devices.

🖼️
Image Tool

Try Image Compressor

Reduce image size up to 80% — free, instant, no upload needed.

→
🖼️
Image Tool

Try Image Compressor

Reduce image size up to 80% — free, instant, no upload needed.

→