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JavaScript Formatter

Pretty-print, minify, and validate JavaScript in the browser. Indent options, stats, import .js files.

PrivateIn your browserInstantUnlimited
Balanced brackets

8 lines · 1 functions · 163 chars (min 137)

Light formatter — not Prettier. Adds indentation around braces and semicolons. Minify strips comments and whitespace. Validate only checks bracket balance; not a full JS parser.

How it works

1

Paste or import JavaScript

Paste JS text or import a .js file up to 5 MB. Unbalanced brackets are flagged live.

2

Format or minify

Format adds readable indentation (2 or 4 spaces). Minify removes comments and extra spaces.

3

Copy or download

Click Format or Minify (counts toward the daily limit). Copy the result or download formatted.js.

Why format JavaScript?

This JavaScript formatter is a lightweight alternative for small scripts and snippets — not Prettier or Babel. It indents, minifies, and only checks bracket balance. For complex syntax or TypeScript, use a full toolchain. Files stay in your browser.

Why use this tool

  • Pretty-print with 2 or 4 space indent
  • Minify with comment removal
  • Bracket balance validation
  • Import .js and .ts files
  • Unlimited — no daily cap

Questions

What does JavaScript Formatter do?

It indents code for readability or minifies JavaScript by removing comments and whitespace. It checks balanced brackets.

Will formatting break my code?

Only whitespace changes in most cases. It is not a full parser — strings containing braces or semicolons may format incorrectly.

Does it parse TypeScript or JSX?

You can paste TS/JSX, but formatting is brace-based. Complex syntax may not layout perfectly.

Is my code sent to a server?

No. Processing runs entirely in this tab.

Is there a daily limit?

No. This tool has no daily cap.

What does Validate check?

It checks that curly braces, parentheses, and square brackets are balanced — a quick sanity check, not full syntax validation.

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