Bootstrap vs Tailwind CSS: source lines of code compared
As of 2026-08-14, twbs/bootstrap contains 56,948 total lines (49,660 code) across 341 files, while tailwindlabs/tailwindcss contains 166,441 total lines (138,936 code) across 488 files as of 2026-08-14. tailwindlabs/tailwindcss is about 2.8x the size of twbs/bootstrap by code lines. Code size is not code quality: a larger count only means more source material, not a better or worse project.
Top languages in twbs/bootstrap: JSON (44.6% of code), Astro (23.7% of code), Sass (17.7% of code). Top languages in tailwindlabs/tailwindcss: TypeScript (83.8% of code), Rust (10.5% of code), YAML (3.5% of code). JSON, TypeScript appear in both top language lists; Astro, Sass, JavaScript appear only in twbs/bootstrap's top languages; Rust, YAML, CSS appear only in tailwindlabs/tailwindcss's top languages.
Methodology: both counts come from cached OctoCounts reports generated with tokei. twbs/bootstrap was counted at ref main (commit 6177d5f8497f) on 2026-08-14; tailwindlabs/tailwindcss was counted at ref main (commit 021b7fe6f239) on 2026-08-14. See the counting methodology for ignored directories and analysis options.
Evidence and next steps:
Note: code size is not code quality. OctoCounts only reports reproducible line counts and makes no claim that either project is better.