Data converters
JSON Formatter
Format, validate, and beautify JSON instantly. Nothing you enter leaves your browser.
Your result will appear here.
What this tool does
About the JSON Formatter
Format, validate, and beautify JSON instantly. It is useful when data needs to move between spreadsheets, APIs, configuration files, databases, or documentation without retyping records.
Formatting changes whitespace and layout for readability; it does not intentionally change the underlying values.
How to use it
- Paste JSON in the input pane. Use the example button if you want to see the expected syntax.
- Indentation can be set to 2 spaces, 4 spaces, Tabs. Then select “Format JSON.”
- Inspect the result for warnings or structural differences, then copy it into the destination system.
Practical example
Start with a known input
Try this sample input:
{"hello":"world"}
Select “Format JSON” and compare the result with the source before using it elsewhere. What to know about the result
- JSON preserves nested objects, arrays, numbers, booleans, and null values, but it requires quoted property names and does not allow comments.
- Indentation can be set to 2 spaces, 4 spaces, Tabs.
- Processing happens in this browser. Your entered text and selected files are not sent to FormatCalc for conversion.
Common questions
Using the JSON Formatter
Is the JSON Formatter free to use?
Yes. FormatCalc's JSON Formatter is free to use with no account required.
Is my data private when I use the JSON Formatter?
Yes. This tool processes your input locally in your browser. FormatCalc does not upload or store what you enter.
How do I use the JSON Formatter?
Paste or type your input, select any available options, and choose Format JSON. You can then copy the result.
What should I check before using the result?
JSON preserves nested objects, arrays, numbers, booleans, and null values, but it requires quoted property names and does not allow comments. Indentation can be set to 2 spaces, 4 spaces, Tabs. Processing happens in this browser. Your entered text and selected files are not sent to FormatCalc for conversion.