#219 · Backend Framework Tools Developer Tool

Node Formatter

Format Node.js source and configuration files directly in the browser. The formatter supports JavaScript, TypeScript, CommonJS, ES modules, package.json, tsconfig, and related JSON files while preserving shebangs, comments, template literals, and common Node-specific syntax.

Developer Input

Node formatter input

Node.js code or configuration

const fs=require('node:fs');
const path=require('node:path');
function load(file){if(!file){throw new Error('file required')}return JSON.parse(fs.readFileSync(file,'utf8'))}
module.exports={load};

Code type

Indent size

spaces

Trim trailing whitespace Preserve comments and shebang Group imports and requires Auto-run while typing

How to use this developer tool

Paste Node.js source, JSON, or package metadata.
Select the code type or use Auto Detect.
Choose indentation and grouping options.
Run the formatter and review the output before replacing project files.

What this developer tool does

The formatter normalizes Node-specific source and JSON structure using conservative browser-side rules.

Detect source type → preserve strings, comments, and shebangs → normalize braces and indentation → optionally group modules → serialize JSON safely.

Complex JavaScript and TypeScript constructs should be checked with a project formatter after browser-side formatting.

Example

Compact CommonJS source is expanded into readable functions with normalized braces, spacing, requires, and exports.

Tips for better output

Use JSON mode for strict configuration files.
Preserve shebangs in CLI scripts.
Review regular expressions and template literals.
Run the Node Checker after formatting.

FAQ

How do I format Node.js code online?

Paste the source, select Auto Detect or a module type, choose indentation, and run the formatter.

Can this formatter handle package.json files?

Yes. Valid package.json data is parsed and emitted as formatted JSON.

Does Node Formatter support CommonJS and ES modules?

Yes. Both require/module.exports and import/export source can be formatted.

Can it preserve Node.js shebang lines?

Yes. Common shebang lines are preserved at the beginning of CLI files.

Will the formatter change runtime behavior?

It is designed for conservative formatting, but complex code should always be reviewed and tested.

Related developer tools

Node Checker Node Generator Node Converter Node Parser

Supported formats

Area	Coverage
JavaScript	CommonJS and ESM source
TypeScript	Node-oriented TS source
JSON	package and project configuration
CLI	Shebang-preserving scripts

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