Ruby Formatter Beautifier
Format and beautify your Ruby code with customizable indentation and line length settings. Make your code readable and well-structured.
Result
Please check your inputs.
How to Use This Tool
Paste or type your Ruby code into the input box on the left side of the tool.
Adjust the indentation size (e.g., 2 spaces) and maximum line length using the sliders or input fields.
Click the 'Format' button to instantly beautify your code.
Review the formatted output in the right panel; you can copy it with the 'Copy' button.
What Is Ruby Formatter Beautifier?
The Ruby Formatter Beautifier is a web-based tool that automatically restructures your Ruby source code to follow consistent formatting rules. It parses your code and reformats it with proper indentation, consistent spacing, and controlled line lengths. This matters because clean, well-structured code is easier to read, debug, and maintain — both for individual developers and teams collaborating on projects. By enforcing a standard style, the tool helps eliminate trivial formatting debates and reduces cognitive load when switching between different codebases.
Formula
The tool uses a two‑step process: First, it parses the Ruby code into an Abstract Syntax Tree (AST) using Ruby's built‑in parser. Then it regenerates the code with proper indentation and line breaks. The indentation formula is: indent_level = current_nesting * indent_width, where current_nesting is the depth of blocks, methods, classes, etc., and indent_width is the user‑chosen number of spaces (default 2). For line length, the tool applies: if line_length > max_length, split the line at the nearest logical breakpoint (e.g., before an operator, after a comma) and continue on the next indented line. The formula ensures every line respects the user‑set max_line_length while preserving Ruby's syntactic correctness.
Tips for Best Results
🔧 Always set indentation to match your team’s style guide (most Ruby projects use 2 spaces) for seamless collaboration.
📏 Choose a line length of 80–120 characters — 80 is classic for terminal viewing, while 100–120 suits modern wide screens.
🔄 Run the formatter before committing code to keep your repository clean and consistent across all contributors.
🧹 Use the tool as a quick sanity check: paste snippets from online tutorials to learn and adopt proper formatting habits.
Frequently Asked Questions
Does the Ruby Formatter Beautifier change my code’s functionality?
No, the tool only changes whitespace and line breaks — it does not modify any Ruby keywords, method calls, or logic. Your code will behave exactly the same after formatting, just with improved readability.
Can I use custom indentation styles like tabs instead of spaces?
Currently, the tool supports spaces only because they are the standard in the Ruby community. You can easily choose any number of spaces from 1 to 8 to mimic tab‑like indentation.
What happens if my code has syntax errors — will the formatter still work?
The tool performs a syntax check before formatting. If your code contains syntax errors, you’ll see an error message explaining the issue, and the formatting will not proceed. Fix the errors first, then reformat.