JS/TS Formatter – Free Online JavaScript & TypeScript Beautifier

Format JavaScript and TypeScript code using Prettier. Customize print width, tab width, semicolons, and quotes.

Try it Free →

Features

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Prettier Powered

Uses the industry-standard Prettier formatter for consistent, beautiful code.

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JS & TS Support

Automatically detects and formats both JavaScript (.js) and TypeScript (.ts/.tsx) files.

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Customizable Options

Print width, tab width, indentation, semicolons, single/double quotes, trailing commas.

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Privacy First

Loads Prettier from CDN and runs entirely in your browser. Your code never leaves your device.

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One-Click Copy

Copy the formatted code to your clipboard instantly.

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File Upload

Upload a .js, .ts, .jsx, or .tsx file directly to format.

How to Use

1

Paste Your Code

Paste or upload your JavaScript or TypeScript code.

2

Set Options

Choose your preferred formatting options: print width, semicolons, quotes, etc.

3

Format

Click Format to beautify your code with Prettier.

4

Copy

Copy the formatted code to your clipboard.

Frequently Asked Questions

Is Prettier loaded from CDN?
Yes. Prettier is loaded from the official Prettier CDN (prettier.io) when you first use the formatter. After that, it's cached in your browser.
What options can I customize?
Print width (default 80), tab width (default 2), use tabs vs spaces, semicolons (required or not), single vs double quotes, trailing commas (none, es5, all), and bracket spacing.
Does it support JSX and TSX?
Yes. The formatter handles .jsx and .tsx files with full JSX/TSX syntax support.
Is my code sent to a server?
Prettier runs entirely in your browser after being loaded from CDN. Your code is processed locally and never sent to any server.

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