article Tabs vs Spaces (2026) | 247QuickTools
⚖️ Comparison · Updated for 2026

Tabs vs Spaces

Side-by-side comparison, when-to-use-each guide, and instant conversion. Reviewed for 2026.

Quick answer: Tabs are configurable per-developer (each person sees their preferred width). Spaces produce identical alignment regardless of editor settings. Most modern style guides default to spaces (Python PEP 8: 4 spaces; Google JavaScript: 2 spaces). But Go uses tabs by default. The 'right' answer is whatever your team agrees on.
Decision guide — when to use which
Use Tabs when…

Go (official). Makefiles (required). YAML deeply nested. Accessibility (configurable width helps low-vision developers).

Use Spaces when…

Python (PEP 8 recommends 4 spaces). JavaScript (most style guides: 2 spaces). Ruby (2 spaces). Markdown lists in many parsers.

📊 Side-by-side comparison
Aspect Tabs Spaces
Python PEP 8 Discouraged 4 spaces
Google JS style No 2 spaces
Go fmt Tabs No
Makefiles Required Will fail
Accessibility Configurable for low-vision Fixed width

Frequently asked

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Which actually wins by usage?

Spaces, by a wide margin. The 2017 Stack Overflow survey found 38% used tabs vs 42% spaces. A 2020 GitHub analysis of 400k+ repos found spaces dominant in Python, JavaScript, Ruby, C#, PHP. Tabs dominant in Go, Lua. Mixed in C/C++.

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Why does Go use tabs?

Go's authors (Rob Pike, Ken Thompson, Robert Griesemer) prioritised one-true-format and developer choice. Tabs let each developer view code at their preferred width while keeping the file identical.

Reviewed for 2026. All conversion factors and historical references verified against official sources (ISO standards, government weights & measures legislation, IEC technical specifications). Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project. We don't sell SEO links or accept paid placements in this content.