Free Toolkit

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

Spaces to Tab Converter illustration
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Spaces to Tab Converter

Convert leading spaces to tab characters with configurable tab width.

How to Use
1

Paste Text

Paste code or text with space indentation.

2

Set Tab Width

Choose 2, 4, or 8 spaces per tab.

3

Copy Result

Copy the text with tabs instead of leading spaces.

What Is Spaces to Tab Converter?

The Spaces to Tab Converter replaces leading spaces in each line with tab characters based on the specified tab width (2, 4, or 8 spaces per tab). Only leading indentation spaces are converted — spaces within the text content are preserved. If the leading spaces do not divide evenly by the tab width, remaining spaces are kept. This is useful for converting between indentation styles and reducing file size.

Why Use Our Spaces to Tab Converter?

  • Convert space-indented code to tabs
  • Only converts leading indentation, not inline spaces
  • Handles uneven indentation gracefully
  • Reduce file size by replacing spaces with tabs

Common Use Cases

Code Formatting

Convert space-indented code to tab indentation.

Editor Preference

Convert to your preferred indentation style.

File Size

Reduce file size by converting multiple spaces to single tab characters.

Style Compliance

Meet coding style requirements that specify tabs over spaces.

Technical Guide

The converter processes each line individually. It counts leading space characters by iterating from the start of each line. The count is divided by the specified tab width: the quotient becomes the number of tab characters, and the remainder becomes leftover spaces. The line is reconstructed as tabs + remainder spaces + rest of line content. This approach only affects leading whitespace, preserving all other spaces in the line. For example, with tab width 4, a line starting with 10 spaces becomes 2 tabs + 2 spaces.

Tips & Best Practices

  • 1
    Only leading spaces are converted — inline spaces are untouched
  • 2
    Uneven indentation produces tabs plus remaining spaces
  • 3
    Set the tab width to match the original indent size
  • 4
    Combine with the Tab to Spaces tool for the reverse operation

Related Tools

Tab to Spaces Converter

Convert tab characters to spaces with configurable tab width.

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Indent/Dedent Text

Add or remove indentation from text with spaces or tabs.

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Whitespace Visualizer

Make invisible whitespace characters visible with symbolic markers.

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Remove Extra Spaces

Remove extra whitespace — collapse multiple spaces to single spaces.

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Word Counter

Count words, unique words, characters, and see word frequency in any text.

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Character Counter

Count characters with and without spaces, plus word, line, and paragraph counts.

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Frequently Asked Questions

QDoes it convert ALL spaces to tabs?
No, only leading (indentation) spaces are converted. Spaces within text content are preserved.
QWhat happens with odd numbers of spaces?
Leftover spaces that don't form a complete tab are kept as spaces. E.g., 5 spaces with width 4 = 1 tab + 1 space.
QHow do I know the right tab width?
Look at your code's indentation: count the spaces used for one indent level.
QCan I convert tabs back to spaces?
Yes, use the Tab to Spaces Converter tool.
QDoes it handle empty lines?
Yes, empty lines pass through unchanged.

About Spaces to Tab Converter

Spaces to Tab 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.