Which do most projects use?

Spaces are more common in many communities and are the default in popular formatters, but tabs remain standard in Go and required in Makefiles.

Are tabs better for accessibility?

They can be — screen reader and low-vision users can set their preferred tab width, whereas spaces impose a fixed indentation on everyone.

How do I switch a file's indentation?

Use a tab-to-space or space-to-tab converter to normalize the whole file, then enforce the choice with a formatter.

Tabs vs Spaces

The tabs-versus-spaces debate is a programming rite of passage. Tabs are single characters whose display width each developer can configure, so everyone reads code at their preferred indentation size. Spaces are fixed — indentation looks identical everywhere but takes multiple characters per level.

Beyond tribal loyalty, there are real considerations: accessibility, alignment, file size, and tooling defaults. Both work; what matters is that a codebase picks one and enforces it, ideally via a formatter so nobody has to think about it.

At a glance

Aspect	Tabs	Spaces
Character	One tab per indent level	Multiple spaces per level
Display width	Configurable per developer	Fixed for everyone
Accessibility	Screen readers can adapt width	Fixed width
Alignment	Can misalign mid-line	Consistent alignment
Common in	Go, Makefiles	Python (PEP 8), JS style guides

When to use Tabs

You want each developer to set their own indent width.
You're working in Go or Makefiles that require tabs.
You value smaller files and adjustable accessibility.

When to use Spaces

You want indentation to look identical everywhere.
You follow guides like PEP 8 or Prettier defaults.
You need consistent alignment across editors and tools.

Verdict

Neither is objectively correct — the winning move is to standardize and automate. Many popular style guides and formatters default to spaces, and some languages (Makefiles, Go) mandate tabs. Pick one, encode it in an editorconfig and formatter, and stop debating. When you inherit code using the other style, convert it in one pass so the whole file stays consistent.

Frequently asked questions

Related free tools

Tab to Space Converter

Convert tab characters into a chosen number of spaces for consistent code.

Open Tool

Space to Tab Converter

Convert fixed-width groups of spaces back into tab characters for indentation.

Open Tool

Whitespace Normalizer

Collapse runs of spaces, trim lines, fix newlines and convert NBSP to spaces.

Open Tool