What can I do with JSON Flatten?

Flatten nested JSON keys into dot notation. JSON Flatten is part of the JSON shelf on utils.sbs and is designed for quick, one-off tasks.

Is JSON Flatten free to use?

Yes. JSON Flatten is free, requires no account, and has no per-file or per-use charge.

Are my files uploaded when I use JSON Flatten?

No. JSON Flatten is designed to process your input locally in the browser. Files are not uploaded to a server for processing.

What formats does JSON Flatten support?

It works with plain text, code, markup and structured text, and returns a downloadable text file.

Can I use JSON Flatten on my phone?

Yes. JSON Flatten is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

JSON tool

JSON Flatten

Flatten nested JSON keys into dot notation.

Runs on-deviceNo sign-upFree

All json tools

Workspace

JSON Flatten

Runs locally

Input

201 chars · 23 wordsStays in this tab

Output

The guide

By the utils.sbs team · Reviewed November 2026 · How we build and review tools

Quick answer

JSON Flatten is a free browser-based json tool. Flatten nested JSON keys into dot notation. It runs with JavaScript locally, requires no account and does not upload your files. Open the page, add your input, adjust any options and download the result.

What is JSON Flatten?

JSON Flatten is a free browser-based json tool from utils.sbs. Flatten nested JSON keys into dot notation. It is built for quick, focused jobs: open the page, add your input, adjust the options and take the result with you. No account, install or server upload is required.

At a glance

Category	JSON
Input	Plain text, code, markup or JSON
Output	A downloadable text or code file
Engine	JavaScript
Processing	In your browser
Price	Free
Account	Not required

How JSON Flatten works

Text is processed in the browser with JavaScript and downloaded from a local blob. Nothing is uploaded.

How to use JSON Flatten

1Open JSON Flatten and add your input.
2Use the default settings, or choose the format or detail level that matches your goal.
3Run the tool, check the preview or result, and download the output.

When to use JSON Flatten

Clean, transform or compare text before using it elsewhere.
Convert markup, JSON or structured text between formats.
Count, format or inspect content quickly in the browser.

Limitations

Very large inputs may be limited by the browser's available memory.

Privacy and accuracy

JSON Flatten processes its input in the browser whenever the platform API allows it. Files and values are not uploaded to a server for processing, and the tool does not require an account. For calculations, use the result as a reference and verify important decisions against the source formula or a qualified professional. Read our methodology.

FAQ

JSON Flatten questions

What can I do with JSON Flatten?
Flatten nested JSON keys into dot notation. JSON Flatten is part of the JSON shelf on utils.sbs and is designed for quick, one-off tasks.
Is JSON Flatten free to use?
Yes. JSON Flatten is free, requires no account, and has no per-file or per-use charge.
Are my files uploaded when I use JSON Flatten?
No. JSON Flatten is designed to process your input locally in the browser. Files are not uploaded to a server for processing.
What formats does JSON Flatten support?
It works with plain text, code, markup and structured text, and returns a downloadable text file.
Can I use JSON Flatten on my phone?
Yes. JSON Flatten is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

Keep going

Related json tools