Tidy Tailwind

Run the canonicalizer over the class strings, put the results back, done.

Steps

1. Find the Tailwind class strings in the files or components you were pointed at.
2. Run them through npx @tailwindcss/cli canonicalize.
3. Put the changed strings back in the source.
4. Run the project's formatter and any checks it has.
5. Confirm nothing looks different.

The command

npx @tailwindcss/cli canonicalize collapses shorthands (mt-2 mr-2 mb-2 ml-2 to m-2), resolves overrides (py-3 p-1 px-3 to p-3), turns arbitrary values into named utilities where one exists, and sorts. Pass --css path/to/input.css if the project has a custom CSS entry.

One string:

npx @tailwindcss/cli canonicalize "mt-2 mr-2 mb-2 ml-2"
# m-2

Several, one result per line:

npx @tailwindcss/cli canonicalize "py-3 p-1 px-3" "mt-2 mr-2 mb-2 ml-2"
# p-3
# m-2

From stdin, one per line:

echo "py-3 p-1 px-3\nmt-2 mr-2 mb-2 ml-2" | npx @tailwindcss/cli canonicalize
# p-3
# m-2

Structured output with input, output, and changed:

npx @tailwindcss/cli canonicalize --format json "py-3 p-1 px-3"
# [{ "input": "py-3 p-1 px-3", "output": "p-3", "changed": true }]

--stream processes stdin line by line without buffering.