What can I do with JSON Formatter?

Prettify JSON with configurable indentation. JSON Formatter is part of the Developer shelf on utils.sbs and is designed for quick, one-off tasks.

Is JSON Formatter free to use?

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

Are my files uploaded when I use JSON Formatter?

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

What formats does JSON Formatter support?

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

Can I use JSON Formatter on my phone?

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

Developer tool

JSON Formatter

Prettify JSON with configurable indentation.

Runs on-deviceNo sign-upFree

All developer tools

Workspace

JSON Formatter

Runs locally

Indent spaces

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 Formatter is a free browser-based developer tool. Prettify JSON with configurable indentation. 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 Formatter?

JSON Formatter is a free browser-based developer tool from utils.sbs. Prettify JSON with configurable indentation. 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	Developer
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 Formatter works

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

How to use JSON Formatter

1Open JSON Formatter 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 Formatter

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 Formatter 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 Formatter questions

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

Keep going

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