Indent Converter - Tabs ↔ Spaces

Convert leading indentation between tabs and spaces. Only leading whitespace is changed - your code content is untouched.

Last reviewed: April 2026

New to this tool? Click here for instructions

Input
Output
Paste code above to convert indentation.

How to Use the Indent Converter

The Indent Converter is a simple tool that allows you to convert indentation between tabs and spaces. To use it, simply paste your code into the input box, select the desired conversion mode, and click 'Convert'. The output will update immediately as you type.

Tabs vs. Spaces: The Eternal Debate

The choice between tabs and spaces for code indentation is a long-standing debate in software development. Both approaches have their merits. Spaces render identically in every editor, terminal, and code review tool regardless of configuration. When you share code on GitHub, in Slack, or in a terminal, space-indented code always looks exactly as intended.

How the Converter Works

The Indent Converter processes each line of your code and looks at the leading whitespace only. For tabs-to-spaces conversion, each leading tab character is replaced by the specified number of spaces. For spaces-to-tabs conversion, leading groups of N spaces are replaced by a single tab. Non-leading whitespace - spaces inside strings, between tokens, in comments - is left completely unchanged. This means the conversion is safe for code in any language and will not alter your logic or string values.

Tips, Edge Cases, or Limitations

The Indent Converter is a simple tool that is easy to use and does not have many limitations. However, it only processes the leading whitespace of each line. Non-leading whitespace, such as spaces inside strings, between tokens, and in comments, is left unchanged. This means the tool is safe to use with any code.

Frequently Asked Questions

The choice between tabs and spaces for code indentation is a long-standing debate in software development. Both approaches have their merits. Spaces render identically in every editor, terminal, and code review tool regardless of configuration. When you share code on GitHub, in Slack, or in a terminal, space-indented code always looks exactly as intended.
No, the tool only processes the leading whitespace of each line. Non-leading whitespace, such as spaces inside strings, between tokens, and in comments, is left completely unchanged.
The custom indent size option allows you to specify the number of spaces to use for indentation when converting tabs to spaces.
Yes, you can use this tool to fix mixed tabs and spaces. Simply select the desired conversion mode and enter your code. The tool will replace each leading tab character with the specified number of spaces or leading groups of N spaces with a single tab.
No, your code is never sent to a server. The Indent Converter is 100% client-side, meaning your code is processed locally in your browser.

Quick reference

Indent Converter - Tabs ↔ Spaces
Tab Size Space Count Conversion Direction Result Example
4 2 Tabs → Spaces
4 4 Tabs → Spaces
2 4 Spaces → Tabs
8 4 Tabs → Spaces
4 6 Tabs → Spaces
2 2 Spaces → Tabs

Example walk-through

Worked example: step-by-step

Step 1. Navigate to the "Indent Converter - Tabs ↔ Spaces" webpage and locate the text area for input.

Step 2. Paste the following sample code containing tabs:


function example() {
    console.log("Tab\tconverted");
}

Step 3. Select the conversion direction (e.g., "Tabs to Spaces") and specify the number of spaces per tab (e.g., 4 spaces).

Step 4. Click the "Convert" button to process the text. The tool replaces tabs with spaces while preserving code structure.

Step 5. Review the expected output showing the converted code:


function example() {
    console.log("Tab    converted");
}

Step 6. Download or copy the converted code. The tool handles edge cases like mixed indentation and preserves comments during step by step transformation.