Kotlin Code Formatter

Kotlin Code Formatter

Paste any Kotlin source and get a clean, ktlint-style reformat in your browser. The formatter normalizes indentation, fixes operator spacing, sorts imports, and adds trailing commas in multi-line lists, all without sending code to a server.

Nutzung

1. Paste your Kotlin code into the input box, or click Probieren Sie ein Beispiel aus to load a sample file.
2. Pick the indent size (2 spaces, 4 spaces, or tabs) and the maximum line width.
3. Umschalten Imports sortieren und Add trailing commas based on your style preference.
4. Klicken Sie auf Format and copy or download the cleaned-up output.

Funktionen

• Konfigurierbare Einrückung – switch between 2 spaces, 4 spaces, or tabs without re-editing the file.
• Operator spacing – consistent whitespace around =, ==, ===, ->, ?:, and compound assignments.
• Import sorting – alphabetical ordering of import declarations as a single block.
• Trailing commas – automatically appended in multi-line argument and parameter lists.
• Brace placement – opening braces stay on the same line as their declaration, matching Kotlin conventions.
• String & comment safety – tokens inside string literals, KDoc, and block comments are preserved verbatim.
• Nur clientseitig – your code never leaves the browser; no upload, no logs.
• Kopieren & Herunterladen – grab the result as text or save it as a .kt Datei.

When This Tool Helps

This formatter is built for situations where running a full ktlint or ktfmt toolchain is overkill: pasting a snippet from a chat or pull-request thread, cleaning up a one-off Gist, or normalizing a sample for documentation. It applies the rules that bite most often in code review – inconsistent spacing around colons, missing blank lines between top-level declarations, mismatched indent levels after an edit – and leaves the deeper semantic transforms to the IDE.