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JavaScript Prettify Examples

Review practical JavaScript Prettify examples so you can understand expected input, output, and common patterns faster.

Why examples matter for JavaScript Prettify

Use this JavaScript Prettify tool to format compact or messy JavaScript into a more readable structure. It is useful for debugging copied snippets, inspecting generated code, reviewing minified-looking samples, cleaning simple scripts, and making JavaScript easier to scan before editing or sharing.

Example pages are especially useful for developer tools because they show what good input looks like, what kind of output to expect, and how the tool behaves in common scenarios.

JavaScript Prettify examples

Prettify a compact function

Input

function test(){if(true){console.log('ok');}}

Output

function test() {
  if (true) {
    console.log('ok');
  }
}

Useful when copied JavaScript is all on one line.

Prettify a compact object and array snippet

Input

const data={items:[1,2,3],ok:true};

Output

const data = {
  items: [1, 2, 3],
  ok: true
};

Makes short data-oriented JS snippets easier to inspect.

How to use these examples

  1. Paste JavaScript into the input box
  2. Click Run Tool to format it
  3. Review the formatted output with indentation
  4. Scan the structure more easily before editing or copying
  5. Copy the result for debugging, documentation, or cleanup

Common mistakes in sample input

Expecting a basic prettifier to fully understand every JavaScript edge case

Fix: Use it for readability and quick cleanup, then review complex syntax manually.

Pasting broken JavaScript and expecting correct formatting

Fix: Check missing brackets, quotes, or incomplete snippets before formatting.

Using JavaScript Prettify for JSON content

Fix: Use JSON Formatter for strict JSON objects and arrays.

Next steps

After reviewing these examples, run the live tool with your own input. If your task involves a follow-up step, the related page can help you move to the next tool in the workflow.

Run the main tool

Open the main JavaScript Prettify page and test your own real input.

Open JavaScript Prettify