JSON Formatter

Parse strict JSON and serialize it with the chosen indentation. No comments or trailing commas.

Free to useNo sign-upRuns in your browser

Enter your details

Enter the inputs, then select Format JSON.

Your result

Enter your details

Result will appear here

How JSON Formatter works

Parse strict JSON and serialize it with the chosen indentation.

No comments or trailing commas. Duplicate object keys are rejected; unsafe integer values are rejected to avoid rounding. Original numeric spelling and key order can change.

Concept diagram for JSON Formatter, showing json source input and the supported output. — Concept diagram; the three operation images are actual browser captures.

How to use JSON Formatter

Start with your own input.

Enter json source

Replace the example with the json source you want to process. No comments or trailing commas.

Format JSON

JSON Formatter: input and settings in the implemented browser tool — Actual local browser view. Open the image to read it at full size.

Check the settings

Set indent spaces. These values determine the result.

Format JSON

JSON Formatter: tool result in the implemented browser tool — Actual local browser view. Open the image to read it at full size.

Run, review and copy

Select Format JSON. Review indented valid JSON, then use Copy result or Save result.

Format JSON

JSON Formatter: review the details in the implemented browser tool — Actual local browser view. Open the image to read it at full size.

When to use JSON Formatter

Read a compact JSON response

To read a compact JSON response, start with json source. Parse strict JSON and serialize it with the chosen indentation.

Format JSON

Tabular source records represented by a spreadsheet grid. — Prepare tabular records. Concept illustration.

Review a configuration file

To review a configuration file, start with json source. No comments or trailing commas.

Format JSON

Table columns and cell arrangements shown for review. — Inspect the columns. Concept illustration.

Prepare an indented fixture

To prepare an indented fixture, start with json source. Copy the result into your working document, or save a local file for later review.

Format JSON

A table prepared for another data workflow. — Continue with the table output. Concept illustration.

How to read the result

Check what the output means.

Indented valid JSON. Parse strict JSON and serialize it with the chosen indentation.

No comments or trailing commas. Duplicate object keys are rejected; unsafe integer values are rejected to avoid rounding. Original numeric spelling and key order can change.

Format JSON Format JSON

Table cells and source records represented for interpretation. — Understand rows and cells. Concept illustration.

Supported input and limits

Check the format before processing.

No comments or trailing commas. Duplicate object keys are rejected; unsafe integer values are rejected to avoid rounding. Original numeric spelling and key order can change.

Inputs and results are processed locally. Keep your source and save the output you need before leaving.

Format JSON Format JSON

Tabular structure reviewed before using the output. — Check structure and interpretation. Concept illustration.

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Format JSON with your input

Check the result and copy or save the output.

Format JSON

JSON Formatter: common questions

Answers about using JSON Formatter and understanding its results.

What does the result represent?

Indented valid json. No comments or trailing commas. Duplicate object keys are rejected; unsafe integer values are rejected to avoid rounding. Original numeric spelling and key order can change.

Can I copy or save the output?

Yes. Use Copy result or Save result after processing. Inputs and results are handled in this browser; save what you need before leaving.