Flutter Dart Formatter

Dart

Flutter Dart formatter to format Dart code used in Flutter development. Ensure your Flutter code follows Dart formatting standards. It runs in your browser, and your input stays on this device.

Back to Dart Formatter

Formatter example

Compare the exact input shape with the cleaned output before opening the editor.

Local preview

Before

input
function dart(){return true}

After

formatted
function dart() {
  return true
}

Workflow

Use Dart without sending code.

Paste a snippet, run the action, review any highlighted issue, then copy the result back to your work.

Current language
Dart
Current action
Flutter Dart Formatter
  1. 01

    Start

    Paste a snippet or full file into the editor.

  2. 02

    Run

    Use Run Flutter Dart Formatter from the action bar.

  3. 03

    Review

    Fix syntax issues if processing stops.

  4. 04

    Move

    Use Copy code when the result is ready.

Files
.dart
Paste a Dart snippet or a full source file.
Engine
dart format
Runs the browser-side formatter for readable output.
Privacy
Local run
The editor does not send pasted code to a formatting API.
Result
Readable output
Move the formatted code back to your editor.