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Ruby Formatter

Format and beautify Ruby code with RuboCop-style 2-space indentation. Handles do/end and {} blocks, method definitions, and class structure.

Indent:
📥 Input
📤 Output
Ready — paste code and click Format · Ctrl+Enter to format
Lines: — Size: —
Load example: ▶ Class ▶ Block
📊 Stats
—
Lines
—
Size
💡 Quick Reference
2 spacesStandard indent
do/endMulti-line blocks
{}Single-line blocks
snake_caseMethods & variables
?/!Predicate/bang methods
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Ruby Style Guide & RuboCop

Ruby uses 2-space indentation (unlike most other languages that use 4) as defined in the community Ruby Style Guide and enforced by RuboCop, the most widely used Ruby static analysis tool. Ruby has two block syntaxes: do/end for multi-line blocks and {} for single-line blocks. The Style Guide recommends do/end for blocks that span multiple lines.

Frequently Asked Questions

The Ruby community converged on 2-space indentation historically, likely influenced by Matz's (Ruby's creator) own style and the early Rails codebase. Unlike Python where 4 spaces is mandatory per PEP 8, Ruby's 2-space convention is community consensus. RuboCop enforces 2 spaces by default.
Both define blocks (closures), but they have different precedence. {} binds more tightly than do/end, which matters when chaining methods. By convention, use {} for single-line blocks and do/end for multi-line blocks. This is enforced by RuboCop.
Symbols (:name) are immutable, interned identifiers — every reference to :name points to the same object in memory, making them faster for comparisons and hash keys. Strings are mutable and each creation allocates a new object. Use symbols for hash keys, method names, and identifiers; use strings for user-facing content.
Done!

What is Ruby Formatter?

Ruby Formatter is a free online utility designed to help developers, designers, and technical professionals work more efficiently. This tool runs entirely in your browser — no installation required, no data sent to any server.

How to Use Ruby Formatter

  1. Paste or type your input in the editor area above.
  2. Click the action button to process your content.
  3. Copy the output or download the result.

Key Features

  • 100% Free — No registration or payment required.
  • Client-side Processing — Your data never leaves your browser.
  • Instant Results — Get output in milliseconds.
  • No Installation — Works directly in your web browser.
  • Mobile Friendly — Works on phones, tablets, and desktops.

Who Uses Ruby Formatter?

This tool is widely used by web developers, software engineers, data analysts, students, and IT professionals who need a quick and reliable way to process data without setting up complex software environments.

Frequently Asked Questions

Is Ruby Formatter free to use?
Yes, Ruby Formatter is completely free. There are no hidden charges, no subscription fees, and no account required.
Is my data safe when using Ruby Formatter?
Absolutely. All processing happens locally in your browser. No data is uploaded to any server, making it completely private and secure.
Can I use Ruby Formatter on mobile devices?
Yes, Ruby Formatter is fully responsive and works on all modern browsers and devices including smartphones and tablets.
Do I need to install anything to use Ruby Formatter?
No installation is required. Simply open the page in your browser and start using it immediately.
How accurate is Ruby Formatter?
Ruby Formatter uses industry-standard algorithms to ensure accurate and reliable results every time.