End of life / Tailwind CSS / 3.4
Supported
Tailwind CSS 3.4 is supported.
Security fixes until 28 Feb 2027.
- Released
- 18 Dec 2023
- Active support
- —
- Security fixes
- until 28 Feb 2027
- Latest
- 3.4.19
Upgrade to Tailwind CSS 4.3: no end date announced yet.
Release cycles
Every Tailwind CSS cycle, at a glance.
Active support means bug fixes and security fixes; after it, security fixes only. Past the end of security support, nothing.
- Active support
- Security fixes only
- Supported
- Ends within 90 days
- Ended
Cycle
Status
Released
Active until
Security until
Latest
What to upgrade to
Go to 4.3.
4.3 is the newest supported Tailwind CSS cycle.
Before you upgrade
Within a major, update and rebuild. Across majors, run the upgrade tool on a branch and compare the built pages. Read the Tailwind CSS 4.3 upgrade guide
How to check your version
Which Tailwind CSS is this site on?
In the lock file
In the built CSS
Know before support ends.
Porro reads the PHP, framework and database version from every site and tells you 90 days before support runs out.
Dates from endoflife.date/tailwind-css, checked daily · data as of 29 Oct 2026.