Blk is a free, open-source Bootstrap 4 design system and UI kit created by Creative Tim, first released on ThemeWagon in 2018 (8 years ago). It gives developers and designers a ready-made set of 70 handcrafted components, 4 customized plugins, and 3 example pages to build websites without starting from scratch.
What is Blk?
Blk is a Bootstrap 4 design system that packages a complete UI toolkit: 70 components (alerts, badges, buttons, navbars, tooltips, progress bars, popovers, pagination), 4 plugins (DateTime picker, sliders, charts, and Bootstrap switch), and 100+ custom Nucleo icons. The distribution includes 4 HTML files, SCSS and CSS source files, JavaScript files, a Gulp build file, and extensive documentation, so you get both runnable examples and the source to modify. It runs in any modern browser and is distributed via ThemeWagon.
What makes Blk stand out?
- 70 handcrafted components — Bootstrap 4 components designed and named to match Bootstrap classes, so developers can drop them into existing projects.
- 4 customized plugins — DateTime picker, noUISlider-based sliders, charts, and the Bootstrap switch plugin all integrated.
- 100+ Nucleo Icons — a hand-picked set from the 21,000+ Nucleo App icon library, with tooltips on icon hover.
- Animated header and sticky-top nav — the header uses animation and the navigation bar stays fixed at the top when scrolling.
- 3 example pages — includes a pricing table, modal login form, register form UI, contact form UI, and tabbed content to reuse.
- Developer-friendly setup — ships with a Gulp file and SCSS source files, plus separate CSS and JavaScript files for direct editing.
- Extensive documentation — detail documentation covering all components and plugins included with Blk.
- Open source and free — licensed for commercial use with lifetime free updates from ThemeWagon.
Who is Blk for?
- Front-end developers — use Blk as a starting point for Bootstrap 4 projects; components match Bootstrap 4 class names so integration is straightforward.
- UI/UX designers — use the example pages (pricing table, login/register forms) and the 100+ icons to build clickable prototypes.
- Startup and SaaS teams — the landing-style pages and prebuilt forms are ready to be customized for a product marketing site.
What can you do with Blk?
- Build a marketing landing page: assemble the animated header, sticky navbar, pricing table, and contact form UI into a functional one-page site.
- Prototype a user-authentication flow: use the modal login form and register form UI to mock up sign-in and sign-up screens.
- Design a data dashboard: combine the charts plugin, progress bars, and tabbed content to show metrics and statistics.
- Create a UI component library: extract individual components for use in other Bootstrap 4 projects.
Alternatives
- Argon – Free Bootstrap 4 Design System for Faster Web Projects, another starter kit from Creative Tim.
- Material Kit – A Free Bootstrap 4 UI Kit website template following Material Design style.
- Wired UI Kit – a Bootstrap 4 web UI kit with a hand-drawn look.
FAQ
Is Blk free to download?
Yes, Blk is distributed as a free download by ThemeWagon. It is open source and can be used in commercial projects, with lifetime free updates.
What does Blk include in the download package?
The package contains 4 HTML files, all demo images, Gulp file, CSS and SCSS source files, font icons, JavaScript source files, library and plugin files, and the documentation — everything you need to modify and build with it.
What frameworks and libraries does Blk use?
Blk is built on Bootstrap v4.1.3 and requires jQuery, Popper.js, and Poppins font. It also integrates noUISlider for sliders and custom chart code.
Do I need an account to download Blk?
ThemeWagon asks for your email address to send the download link. You sign in or provide your email, and the direct download link is emailed to you.
Who created Blk?
Blk was created by Creative Tim, and it is listed on ThemeWagon under the Landing & Website category.
