---
title: "Frontend – the part of a product users see | Sweet Lava"
description: "The frontend is the interface in the browser, built with HTML, CSS and JavaScript. See what frontend work covers and how it meets the backend."
url: https://sweetlava.eu/en/glossary/frontend/
lang: en
alternate_pl: https://sweetlava.eu/pl/slownik/frontend/
---

Technology 

# What is Frontend?

The frontend is the layer of a digital product the user sees and operates: the website or app interface running in the browser, built with HTML, CSS and JavaScript.

The frontend is responsible for everything you can touch: layout, typography, animations, forms, reactions to clicks. It is also the layer that determines perceived speed – the browser must download, parse and render frontend code before the user sees anything.

Modern frontends are built with frameworks (React, Vue, Svelte) or – for content sites – with approaches that generate static HTML (Astro, Next.js), combining developer comfort with maximum performance.

**Why it matters for business:** frontend quality translates directly into conversion (speed, fluidity), SEO (Core Web Vitals) and accessibility.

## Related services

- [ Custom website design & development → ](https://sweetlava.eu/en/services/websites/)
- [ Web applications & SaaS development → ](https://sweetlava.eu/en/services/web-apps-saas/)

## Related terms

- [Backend](https://sweetlava.eu/en/glossary/backend/)
- [Core Web Vitals](https://sweetlava.eu/en/glossary/core-web-vitals/)
- [Responsive design & mobile-first](https://sweetlava.eu/en/glossary/responsive-web-design/)

## Planning a new company website?

Design and code grow in one team, so what you approve in the mock-up reaches production with no surprises. Scope and quote within a few days.

[ Get in touch ](https://sweetlava.eu/en/contact/?source=glossary-frontend)