What is a JSON pretty printer?

A JSON pretty printer takes minified or raw JSON and adds newlines and indentation to make it easy to read. It is the same as JSON beautification or formatting.

Can I pretty print JSON in JavaScript?

Yes — JSON.stringify(obj, null, 2) pretty prints with 2-space indent. For a quick visual check without writing code, paste the JSON into FixTools instead.

Does pretty printing change JSON validity?

No. Pretty printing only adds whitespace. The JSON remains valid and the data is unchanged.

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JSON Pretty Printer

"Pretty print" is the developer shorthand for formatting JSON with proper indentation so it is readable. FixTools acts as an instant JSON pretty printer — paste your raw JSON and get a clean, indented output with syntax highlighting in one click.

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Cost: Free forever
Sign-up: Not required
Processing: In your browser
Privacy: Files stay local

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Pretty prints in one click

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Validates before printing

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Configurable indentation

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JSON Formatter

All processing happens in your browser — your files are never uploaded to any server.

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How to use this tool

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Paste your JSON and use the Format button to pretty print it with your preferred indentation style.

How It Works

Step-by-step guide to json pretty printer:

1
Paste your JSON string
Paste the JSON you want to pretty print into the editor.
2
Select indentation
Choose 2 spaces, 4 spaces, or tabs.
3
Click Format
FixTools pretty prints the JSON and highlights the syntax for easy reading.