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Format Conversion
· Last updated：2025-09-16
Format and validate JSON data
Execution
Fill in the form, run the tool, and review the result in one place.
Samples
Related
Tool usage guide
The JSON Formatter validates standard JSON syntax and transforms unformatted or minified text into structured, readable output using configurable indentation levels.
Use when you need to validate that data types and object properties adhere to a JSON Schema, rather than only validating general JSON syntax.
Use when converting structured JSON data into tabular row-and-column data with custom delimiters and header controls.
Use when you need to transform JSON data directly into CoffeeScript Object Notation instead of standard JSON formatting.
Best for
Not ideal for
Indent Size set to 0
Setting Indent Size to 0 strips structural line breaks and indentation spaces, producing a compact, minified JSON string.
Single quotes or unquoted object keys
Standard JSON specification requires double quotes for all string literals and key names; inputs using single quotes will fail validation.
Trailing commas in arrays or objects
Commas following the final element in an array or object are invalid in JSON and will trigger a parsing error.
Batch jobs
Call POST https://api.elysiatools.com/en/api/tools/json-formatter with your input and get the same result without opening the page — copy-paste curl, fetch and Python examples are on the tool's docs page.
AI agents
Hand an AI agent the machine-readable spec at /ai/en/tools/json-formatter.md or connect it through the MCP config on the docs page, and it can call this tool for you.
Pipelines & scheduled jobs
Pipe input straight from a script with the fetch or Python example on the docs page and run the same job on a schedule.
Background
An API log contains a continuous, unindented string of nested user profile data.
Problem
The nested attributes cannot be easily parsed or checked for missing fields in one line.
How to use
Paste the string into JSON Input and keep Indent Size at 2.
Indent Size: 2Outcome
A multi-line, formatted JSON string structured with 2-space indentation per nesting level.
Background
A multi-line JSON configuration file needs to be passed as a single-line environment variable string.
Problem
Extraneous whitespace and newlines complicate inline environment variable assignments.
How to use
Paste the multi-line configuration into JSON Input and change Indent Size to 0.
Indent Size: 0The default value for Indent Size is 2 spaces.
Yes. Setting Indent Size to 0 removes line breaks and indentation, producing minified JSON output.
The Indent Size field accepts integers from 0 to 8.
No. It only validates whether the input conforms to standard JSON syntax specifications.
JSON syntax requires double-quoted keys and strings and rejects trailing commas, single quotes, and comments.
Outcome
A single-line, compact JSON string without structural whitespace.