NormWind vs tailwind-merge in 2026

Q: Is NormWind free and open source?

NormWind is free with no paid tier . It uses the MIT licence .

NormWind and tailwind-merge compared on what each does, what each costs, how each is installed and what to check before you pick one for Tailwind code.

By SayDeploy · 2026-10-23

SayDeploy is published by LunarWerx, which makes some of the tools compared here.

tailwind-merge is a utility function that merges Tailwind CSS classes in JS without style conflicts ^[1]. NormWind finds Tailwind class pairs that can be written as one shorthand ^[2]. NormWind is free with no paid tier ^[2].

Option	Price	Install	Tailwind version
tailwind-merge	not published	not published	Tailwind v4.0 up to v4.3 ^[1]
NormWind	Free with no paid tier ^[2]	npm dev dependency, or npx ^[2]	Tailwind CSS v4 projects ^[2]

The short answer

tailwind-merge is a utility function to efficiently merge Tailwind CSS classes in JS without style conflicts ^[1]. NormWind finds Tailwind class pairs that can be written as one shorthand ^[2].

For merging, tailwind-merge's page covers merging classes without conflicts ^[1] and support for Tailwind v4.0 up to v4.3 ^[1]. NormWind's page describes shorthand findings ^[2], automatic fixes ^[2] and a GitHub Action that annotates pull requests ^[2].

What tailwind-merge is built for

tailwind-merge's own page describes it as a way to merge Tailwind CSS classes without style conflicts ^[1]. It calls itself a utility function to efficiently merge Tailwind CSS classes in JS without style conflicts ^[1].

The page states that it supports Tailwind v4.0 up to v4.3 ^[1]. It also says it works in all modern browsers and maintained Node versions ^[1].

For TypeScript users, the page says it has published declarations compatible with TypeScript 3.8 and newer ^[1]. The sources here say nothing more about its features.

What NormWind is built for

NormWind is made by the team that publishes this site.

It finds Tailwind class pairs like px-4 py-4 that can be written as one shorthand like p-4 ^[2]. It flags arbitrary values like rounded-[24px] that match a named Tailwind utility like rounded-3xl, checking that a value matches a named Tailwind class ^[2].

The --fix option rewrites findings in Vue, Svelte, Astro and HTML files, and --fixall also covers JS/TS/JSX/TSX files ^[2]. The --dry-run option shows which files a fix would change without writing to disk ^[2]. Before merging classes it compares the generated CSS before and after, and skips the merge if they differ ^[2].

For CI, it prints text, JSON or SARIF 2.1.0, a standard report format that GitHub code scanning reads ^[2]. The --diff-base option reports only findings on lines changed since a git ref such as origin/main ^[2]. The --baseline option records current per-file finding counts so only new findings fail CI ^[2].

Pricing and fees

The tailwind-merge sources given here do not state a price, so it is not published here. Check its own pages for cost details.

NormWind is free with no paid tier ^[2]. It uses the MIT licence ^[2].

Setting it up and daily use

The tailwind-merge sources here give no install command or setup steps. They describe it as a utility function used in JS ^[1]. Check its own pages for installation and day to day use.

NormWind is installed from npm as a dev dependency, or run with npx ^[2]. It works with Tailwind CSS v4 projects, and its CI runs on Ubuntu, Windows and macOS ^[2].

Daily, you can run the audit, which exits 1 when it finds anything so it can fail a CI job ^[2]. You can preview fixes with --dry-run ^[2] and apply them with --fix ^[2]. It also ships as a GitHub Action that annotates pull requests inline ^[2].

Things to check before you choose

Ask what you need done: merging classes in JS code, or auditing code for classes that can be written shorter. tailwind-merge's page speaks of merging classes in JS ^[1], and NormWind's page describes finding class pairs that can be written as one shorthand ^[2].

Check your Tailwind version. tailwind-merge's page says it supports Tailwind v4.0 up to v4.3 ^[1], and NormWind works with Tailwind CSS v4 projects ^[2].

Check your file types. NormWind's --fix covers Vue, Svelte, Astro and HTML, and --fixall adds JS/TS/JSX/TSX ^[2].

Check your runtime. tailwind-merge's page names modern browsers and maintained Node versions ^[1].

How to choose

If you want to merge Tailwind classes in JS without style conflicts, tailwind-merge's page describes that ^[1].

If you want TypeScript declarations, tailwind-merge's page says they are published for TypeScript 3.8 and newer ^[1].

If you want to find class pairs that can become one shorthand, NormWind's page describes finding class pairs that can be written as one shorthand ^[2].

If you want fixes previewed before writing files, NormWind has --dry-run ^[2].

If you want pull request annotations or CI that fails only on new findings, NormWind describes both ^[2] ^[2].

If you want a tool whose price is published, tailwind-merge's price is not published here, while NormWind is free with no paid tier ^[2].

Frequently asked questions

Is tailwind-merge free?

The tailwind-merge sources given here do not state a price or a plan, so its price is not published here. Its page describes it as a utility function to efficiently merge Tailwind CSS classes in JS without style conflicts ^[1]. Check its own pages for licence and cost details.

Is NormWind free and open source?

NormWind is free with no paid tier ^[2]. It uses the MIT licence ^[2].

How do you install NormWind?

NormWind is installed from npm as a dev dependency, or run with npx ^[2]. It works with Tailwind CSS v4 projects, and its CI runs on Ubuntu, Windows and macOS ^[2]. The tailwind-merge sources here give no install steps, so check its own pages.

Does tailwind-merge support Tailwind CSS?

tailwind-merge's page states that it supports Tailwind v4.0 up to v4.3 ^[1]. The same page also says it works in all modern browsers and maintained Node versions ^[1]. NormWind works with Tailwind CSS v4 projects ^[2].