Bootstrap End of Life - Dates and Lifecycle
Bootstrap is a free, open-source front-end framework for building responsive websites and web applications with pre-built CSS and JavaScript components.
Last updated 1 August 2026
4
Versions tracked
3
At EOL
1
Supported
All versions
| Version | Released | Active LTS | Maintenance LTS | Latest |
|---|---|---|---|---|
|
5
|
05 May 2021 |
Active
|
Active
|
5.3.8
25 Aug 2025
|
|
4
|
18 Jan 2018 |
01 Nov 2021
Ended 4 years, 9 months ago
|
01 Jan 2023
Ended 3 years, 7 months ago
|
4.6.2
19 Jul 2022
|
|
3
|
19 Aug 2013 |
05 Sep 2016
Ended 9 years, 10 months ago
|
24 Jul 2019
Ended 7 years ago
|
3.4.1
13 Feb 2019
|
|
2
|
31 Jan 2012 |
19 Aug 2013
Ended 12 years, 11 months ago
|
19 Aug 2013
Ended 12 years, 11 months ago
|
2.3.2
26 Jul 2013
|
About Bootstrap
Bootstrap is a free, open-source front-end framework for building responsive websites and web applications, providing pre-built CSS and JavaScript components like grids, navigation bars, and forms. It's one of the most widely adopted front-end frameworks in the web's history, and remains in active use across a large share of existing sites.
Bootstrap Lifecycle Explained
Bootstrap has followed a formal Long Term Support policy since 2019. Each major version starts in active development, then transitions to Active LTS once frozen, where it still receives bug fixes, security updates, and documentation updates. After that, it moves to Maintenance LTS, a deep freeze where only critical bug fixes and critical security updates land, before finally reaching end of life. Bootstrap 5 is the current version and is presently in Active LTS, with no Maintenance LTS date set yet.
Frequently Asked Questions
Is Bootstrap end of life?
Not as a project. Bootstrap 5 is actively maintained and in Active LTS. Versions 2 through 4 have all reached end of life.
Is Bootstrap 4 outdated?
Yes, it's past end of life as of January 2023 and receives no further updates, including security fixes. Bootstrap 5 is the actively maintained version.
Will there be Bootstrap 6?
There's no officially announced timeline for a Bootstrap 6 as of this writing. Bootstrap 5 remains the current Active LTS version.
Is Bootstrap still used in 2026?
Yes, it remains one of the most widely used front-end frameworks, both in legacy codebases and new projects, and continues to receive active development under its official LTS plan.