JSON Formatter
Format, beautify, validate, and minify JSON data with customizable indentation and key sorting.
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This online JSON Formatter parses, cleans, and structures your raw JSON payloads for readability and quick debugging. Paste arbitrary JSON data into the text area to inspect its syntax and reformat nested objects and arrays. You can customize the indentation level with any standard spacing count, order object keys alphabetically to compare payloads side by side, or enable compact formatting to strip whitespace for lightweight transfer. Unicode characters in strings remain preserved during formatting. If the input contains invalid syntax, such as trailing commas, unquoted keys, or missing brackets, the tool flags the issue and highlights parser error details alongside your submitted text. When you submit empty or whitespace-only input, the formatter returns cleanly without altering the text. This tool handles validation of parseability and formatting without modifying underlying numeric or string values.
Instructions
- Paste or type your JSON text into the input area.
- Choose your desired indentation spacing count, or enable compact output for minification.
- Optionally turn on key sorting to arrange object keys in alphabetical order.
- Run the formatter to view the structured JSON or review syntax error messages.
Examples
- Formatting a single-line payload {"name":"Alice","active":true,"roles":["admin"]} with 2-space indentation to view nested elements clearly.
- Applying alphabetical key sorting and compact output to {"z":10,"b":20,"a":30} to produce a clean minified string {"a":30,"b":20,"z":10}.
FAQ
What happens if the submitted JSON has invalid syntax?
The formatter detects the syntax failure, retains the original submitted text, and displays specific error details explaining what prevented parsing.
Does this tool preserve Unicode characters in JSON strings?
Yes, valid Unicode characters inside keys and string values are preserved in the formatted output.
Can I minify JSON into a single line without whitespace?
Yes, enabling the compact output option removes formatting whitespace and line breaks, generating compact JSON.
What occurs when the input field is left empty?
Blank or whitespace-only input returns without formatting modifications, indicating that no input was provided.