Free Toolkit

Tab to Spaces ConverterConvert tab characters to spaces with configurable tab width.

Tab to Spaces Converter illustration
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Tab to Spaces Converter

Convert tab characters to spaces with configurable tab width.

How to Use
1

Paste Text

Paste code or text with tab characters.

2

Set Tab Width

Choose 2, 4, or 8 spaces per tab.

3

Copy Result

Copy the text with spaces instead of tabs.

What Is Tab to Spaces Converter?

The Tab to Spaces Converter replaces all tab characters in text with a configurable number of spaces (2, 4, or 8). This is commonly needed when standardizing code indentation, preparing code for display in environments that render tabs inconsistently, or converting between indentation styles. The tool replaces every tab character with the specified number of spaces throughout the entire text.

Why Use Our Tab to Spaces Converter?

  • Standardize code indentation from tabs to spaces
  • Prepare code for display in tab-inconsistent environments
  • Convert between indentation conventions
  • Fix mixed tab/space indentation

Common Use Cases

Code Formatting

Convert tab-indented code to spaces for consistent display.

Code Review

Standardize indentation before code reviews.

Publishing

Convert tabs to spaces for code displayed on websites.

Style Compliance

Meet coding style requirements that specify spaces over tabs.

Technical Guide

The converter uses a simple regex replacement: input.replace(/\t/g, ' '.repeat(spaces)). Each tab character (U+0009) is replaced with the specified number of space characters. The replacement is global, affecting all tabs in the input. Available tab widths are 2, 4, and 8 spaces, covering the most common indentation conventions. Unlike tab-stop-aware conversion (which aligns to column positions), this tool uses simple replacement, which works correctly for leading indentation but may not preserve visual column alignment of inline tabs.

Tips & Best Practices

  • 1
    4 spaces is the most common convention in many languages
  • 2
    2 spaces is popular in JavaScript, TypeScript, Ruby, and YAML
  • 3
    8 spaces matches the traditional Unix terminal tab width
  • 4
    This replaces ALL tabs, not just leading indentation

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Frequently Asked Questions

QWhich tab width should I use?
2 for JavaScript/TypeScript/Ruby, 4 for Python/Java/C++, 8 for matching Unix terminal tabs.
QDoes it only convert leading tabs?
No, it converts ALL tab characters in the text, including inline tabs.
QWill it affect the visual alignment?
Simple tab replacement works for indentation but may change alignment of tab-aligned columns.
QCan I convert spaces back to tabs?
Yes, use the Spaces to Tab Converter tool.
QDoes it handle mixed indentation?
It replaces all tabs with spaces. Existing spaces are unchanged, so the result will be all spaces.

About Tab to Spaces Converter

Tab to Spaces Converter is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.