Quick start
- Paste JSON into the JSON text box.
- Turn on Sort object keys only when alphabetical key order will help comparison.
- Press Format JSON to parse and pretty-print the text.
Best uses
These are the situations this tool is meant for. If your task is close to one of these, the examples and notes below can help you choose the right inputs.
- Pretty-print minified JSON before reading or sharing it.
- Check whether copied JSON has valid quotes, commas, braces, and brackets.
- Sort keys when comparing small JSON objects.
- Copy formatted output for notes, debugging, or documentation.
What this calculator is solving
The JSON Formatter helps you read copied JSON by parsing it and printing it with indentation. It is for syntax and readability, not for proving that an API payload follows a particular business schema.
You do not need to memorize the formula first. Start by matching each input label on the calculator to the number, date, unit, or setting you actually have.
The formula in plain language
In plain language: The tool parses JSON text in the browser, optionally sorts object keys recursively, then serializes the result with two-space indentation. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
If that sounds abstract, use the example cards on the calculator page. They show a complete set of inputs and the kind of answer you should expect.
How to read the answer
Read the headline result first. Then look at the smaller supporting lines because they explain the parts behind the answer, such as totals, units, ranges, or formula steps.
- The output box shows formatted JSON with two-space indentation.
- Root type tells you whether the JSON starts as an object, array, string, number, boolean, or null.
- Keys counts object keys across nested objects.
Common mistakes to avoid
If the answer looks strange, the most likely cause is a small input mismatch: the wrong unit, date, weight, scale, mode, or policy assumption.
- Do not paste private tokens or secrets unless you are comfortable viewing them in this tab.
- Do not confuse valid JSON syntax with valid API data.
- Check trailing commas, missing quotes, and mismatched braces when parsing fails.
Research and references
This guide is based on the calculator inputs, the formula note on the tool page, and common school or everyday usage patterns. If your school, workplace, or organization has an official rule, use that rule first.
Examples from the calculator
Formatted JSON
Indented array
Keys sorted alphabetically
FAQ in plain language
When should I use the JSON Formatter?
Use it when your task matches one of these common needs: Pretty-print minified JSON before reading or sharing it. Check whether copied JSON has valid quotes, commas, braces, and brackets. It works best when you already know the values, dates, units, or settings the page asks for.
What is the JSON Formatter doing with my inputs?
In plain language: The tool parses JSON text in the browser, optionally sorts object keys recursively, then serializes the result with two-space indentation. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
What should I double-check before trusting the answer?
This checks JSON syntax, not whether the data matches an API schema, security rule, or business requirement. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.
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Privacy and copying results
Recent answers stay visible only while you work in the current browser tab. They are not sent to a server.
Use Copy answer when you want to paste the expression and result into notes, homework, a message, or another document. Check the units and assumptions before copying.