Developer Tools
Format messy JavaScript into a cleaner readable layout with indentation and line breaks.
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.
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.
Use javascript prettify when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.
Read step-by-step usage guidance, best practices, and common mistakes.
See common questions and answers about input, output, and tool usage.
Review practical input and output examples before running the tool.
Find similar and supporting tools for adjacent actions and follow-up tasks.
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.
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.
Fix: Use it for readability and quick cleanup, then review complex syntax manually.
Fix: Check missing brackets, quotes, or incomplete snippets before formatting.
Fix: Use JSON Formatter for strict JSON objects and arrays.
It adds indentation and line breaks to make JavaScript easier to read.
Yes. Both names usually mean formatting JavaScript into a cleaner readable layout.
No. It focuses on readability, not full syntax validation.
JavaScript Prettify is for JS code snippets. JSON Formatter is for strict JSON data.
Yes. That is one of the most useful cases for this tool.