Spaces to Tabs Converter

About this calculator

Source code and configuration files sometimes mix indentation styles — leading spaces in one section, tab characters in another — which can cause misaligned display, diff noise, or errors in languages like Python where indentation is syntactically meaningful. Converting leading spaces to tabs at a consistent width is a standard cleanup step to make indentation uniform again.

This tool scans each line, measures the run of leading spaces, and replaces every block matching your chosen tab width with an actual tab character, line by line. It's a routine utility for developers standardizing a codebase's formatting, migrating a project between editors or teams with different indentation conventions, or preparing a file for a linter or formatter that expects tabs rather than spaces.