Ruby Code Formatter

What this Ruby formatter changes

Paste Ruby source to get a more consistently indented text result, or choose Minify to reduce whitespace and remove comments. Beautify mode follows common line and keyword patterns to indent constructs such as method, class, conditional, and loop blocks. It also trims line endings, tidies repeated spaces outside basic quoted strings, and adds a space after commas where needed. The output is still text: the tool does not compile, execute, lint, or validate Ruby syntax.

Ruby’s end keyword closes many block forms, while if, unless, case, and loops express control flow. That context matters because this formatter recognizes familiar patterns rather than building a complete understanding of Ruby. See the Ruby control expressions reference for the language rules. The formatter needs no external lookup data; it works from the source text you enter.

Beautify lets you select 2, 4, or 8 spaces, or tabs, and optionally remove comments. Minify always removes comments and collapses whitespace; it is intended to make text more compact, not to prove that the resulting program behaves identically. The output panel reports character and line counts, and Minify also displays a text-length reduction percentage when available.

Format a snippet and inspect the result

1. Paste or type Ruby source in the input area, or load the built-in example to see the result format.

2. Choose Beautify for indentation cleanup. Select the indentation width and spaces or tabs to match the style you need. Turn on Remove Comments only when you want comment text excluded.

3. Choose Minify to compact whitespace. This mode removes comments automatically and does not use the indentation controls.

4. Review the output against the original, then copy it or download the text as formatted.rb. For code you plan to keep or run, compare the full diff and check it in your project’s Ruby environment.

The result refreshes as the input or settings change. Try a short representative snippet first, especially if it contains unusual strings, nested blocks, or comments.

Questions about the two modes

Review the source before relying on changed text

This is a heuristic text formatter, not a Ruby parser or linter. Ruby syntax can be more nuanced than the line patterns it recognizes, so nested, incomplete, or less common constructs may be indented unexpectedly. It does not guarantee that formatting leaves program behavior unchanged. Inspect the full output and diff, then run your normal project checks before using modified source.

Removing comments deserves particular care. Ruby documentation describes magic comments that can affect interpretation, including encoding and frozen string literal directives in a file’s opening comments. Removing such a directive may change how Ruby treats that file. Keep the original, leave comment removal off when unsure, and check the relevant header and project behavior before adopting the result. See the Ruby comments and magic comments reference.

Do not use Minify as a behavior-preserving production optimization: it removes comments and changes whitespace without syntax-aware verification. For important or sensitive source, follow your organization’s handling rules and review the output locally before sharing, committing, or executing it.