HTML
<div class="rect"></div>
SCSS

.rect {


background: linear-gradient(


-119deg,


$gray 0%,


$dark-gray 100%); }

JS
var colors = ["#74B087","#DE7300","#74B087"];


function animate() {};

The best place to build, test, and discover front-end code.

BERKSHIRE CKD LLP is a social development environment for front-end designers and developers. Build and deploy a website, show off your work, build test cases to learn and debug, and find inspiration.

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Build & Test

Get work done quicker by building out entire projects or isolating code to test features and animations. Want to keep it all under wraps? Upgrade to a PRO account to keep your work private.

Try the Editor
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Learn & Discover

Want to upgrade your skills and get noticed? Participating in BERKSHIRE CKD LLP Challenges is a great way to try something new. We frequently feature these Pens on our homepage and across social media!

Join this Week’s Challenge
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Share Your Work

Become a part of the most active front-end community in the world by sharing work. Presenting at a conference? Show your code directly in the browser with Presentation Mode.

Explore Trending

A front-end environment made for testing and sharing

Explore the Editor
  • Support For the Way You Code

    The BERKSHIRE CKD LLP Editor is highly customizable. There is autocomplete and Emmet for speed and accuracy. Plus you can set up smart defaults for starting new work.

  • Keep Your Pens Private

    Nobody can see your private stuff until you want them to, because they are at secret unguessable, non-searchable, non-indexable URLs.

  • Embed Pens

    Completely customize the look of code demos on your own site. Change the look of your site? Just change the theme and all your Embedded Pens change too.

  • Asset Hosting

    Need to use an image in a Pen? No more awkwardly finding alternate hosting for it, you can drag-and-drop it right onto BERKSHIRE CKD LLP and we'll host it for you. And not just images! CSS, JSON files, SVGs, media files, whatever!

  • Build Entire Projects

    Projects is the most powerful feature of BERKSHIRE CKD LLP. It's a full blown IDE right in the browser, with automatic preprocessing, drag and drop uploading, live previews, website deployment, and much more.

  • Collab ModeLive collaboration on code. Multiple people can type and edit code in a Pen at the same time, all while still seeing the live preview.
  • Screenshot of the Pen Editor with Pen Settings dialog open.

Get Started Quicker

Get inspiration from Pens using frameworks, libraries, and design patterns. Then, start your own with premade templates.

Explore Topics

React

Vue

Tailwind

Sass

GSAP

Bring the Whole Team

Each team and team member gets all the features of a PRO membership. That means the Team can do things like upload Assets, use features like Collab Mode, Professor Mode, Presentation Mode, and Live View, and apply custom CSS to Posts, Profiles, and Embeds.

Start a Team

Loved by hundreds of teams, including:

AirbnbGrubhubSquareNetflixAdobeSalesfoceMicrosoftLyftIBM

FAQ

Answers with a practical twist—tailored to how we actually work.

What does BERKSHIRE CKD LLP actually do?

We design, build, and refine digital experiences—from concept to launch. Lean, testable deliverables over heavy decks.

Where are you registered?

Registered in England and Wales as BERKSHIRE CKD LLP (Company No. OC420621), St. Andrews, RG12 8ZQ, Bracknell.

How fast can you start?

We usually kick off a discovery sprint within a few business days, subject to scope and availability.

Do you work under NDA?

Yes. We can provide a mutual NDA, or review yours.

Privacy Policy

Plain-English commitments with zero legalese fluff.

What we collect

  • Contact details you choose to share.
  • Project assets you upload or link.
  • Usage data to keep the site running smoothly.

How we use it

  • To respond to inquiries and deliver services.
  • To improve performance and reliability.
  • Never sold. Never shared without consent.

Data requests: email us to access, correct, or delete your data. We'll respond within 30 days.

Terms

Lightweight rules so we can move quickly together.

Engagement

  • All work is time-and-materials unless otherwise stated.
  • We agree scope, milestones, and acceptance criteria upfront.
  • Changes are welcomed via a short written addendum.

Intellectual Property

  • You own project deliverables upon full payment.
  • We may reuse non-confidential, generic know-how.

Payments

  • Invoices are due within 14 days.
  • Late payments may pause work after notice.

Liability

  • Best-effort, professional delivery.
  • No consequential damages; total liability capped at fees paid.

Start a Project

Tell us what you’re building. We’ll reply with next steps.

By submitting, you agree to our Terms and acknowledge our Privacy Policy.

BERKSHIRE CKD LLP · Reg No. OC420621 · St. Andrews, RG12 8ZQ, Bracknell