Code Formatter

Format JS, HTML, CSS and more with self-hosted Prettier in LocalKit. Beautify code in your browser—sources stay on-device with no third-party formatter API.

Interactive controls load with JavaScript. Processing stays in your browser—nothing is uploaded.

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How to use

  1. Open Code Formatter — Wait for Prettier vendors to load.
  2. Paste code — Paste JS, HTML, or CSS.
  3. Format — Run format and fix parse errors if shown.
  4. Copy result — Paste into your project.

Limits

Requires JavaScript. Extremely large inputs may slow the browser tab. Results depend on your browser APIs; there is no server-side processing quota because nothing is uploaded.

When to use

When you want a quick, free utility without creating an account or sending content to an online converter.

When not to use

When you need server-side integration, batch automation at scale, or certified compliance tooling.

Privacy note

Tool inputs are processed in your browser only. Theme, language and favorites may use localStorage; hosting may keep standard access logs (IP, UA, URL) without tool payloads.

FAQ（5）

Is Prettier downloaded from a CDN?

No—Prettier standalone + parsers are self-hosted under /assets/vendor/.

Languages?

JS/TS (babel), HTML, and CSS/PostCSS parsers are bundled on this page.

Config file?

Uses sensible defaults in-page; project .prettierrc is not read from disk.

Privacy?

Source stays in the tab.

Format failed?

Fix syntax errors first; parsers require parseable input.