Responsive web design for every screen

Responsive web design for every screen: your customer views your site on a phone, a laptop or something in between. We design mobile-first, so content, buttons and forms stay clear and usable everywhere.

4.9/5 on Google26 reviews

Responsive design keeps the content clear on every screen.

A responsive website keeps its content and character, but adapts hierarchy, spacing, navigation and interaction to the available width.

What responsive design means in practice

The mobile version is not a by-product. From the start, it determines which content and actions take priority.

Mobile-first content hierarchy

Headings, text, proof and CTAs follow an order that stays logical on a small screen too.

Flexible components and images

Grid, typography and media scale without fixed desktop sizes. Images use appropriate formats and crops.

Tested with real interactions

Menus, forms, tables and horizontal rails are tested with touch and keyboard input at different widths.

Responsive web design from mobile layout to tested website

We decide what matters first on a small screen, build the layout and controls, and test the pages. Longer copy and later changes are part of that work.

Mobile-first without losing content

Mobile visitors should understand the same offer as someone using a laptop. We first determine which information they need to evaluate a service and get in touch. That order becomes the foundation of the design. A wider screen can place information side by side, but the reading order must still make sense on a phone without those columns available.

We use real copy and customer questions so long headings or important conditions do not become surprises at handoff. We do not remove information simply because the screen is smaller. We choose what appears immediately and what can sit behind a clear control. For broader visual changes, this work connects with web design.

Flexible layouts and suitable images

A responsive website needs to distribute space without clipping text or buttons. We build grids and text sizes that adapt to the available width. Breakpoints follow the needs of the content, rather than only familiar device sizes. A row of service cards might need to stack earlier when its headings turn out longer than expected in the final copy.

Images get appropriate dimensions and crops that keep the subject visible. We reserve space so text does not shift unexpectedly as images load. Tables and embedded media also need a deliberate mobile presentation. Small screens do not need the same heavy files as wide desktops; where possible, we let the browser choose suitable image variants.

Menus and forms people can use

On a phone, completing a task matters more than fitting a good-looking page on the screen. We check that buttons are easy to tap, menus can be closed, and forms have understandable labels. The on-screen keyboard should not make the active field or necessary next step unreachable. An error message should explain what the visitor needs to change before continuing.

We test the same components with a keyboard, so controls do not rely on touch or a mouse. Focus stays visible and follows a logical order. Floating buttons and banners must not block content when someone zooms in. For unusual interactions, we agree on supported situations and identify existing components that would work better if simplified.

Motion that respects your preferences

Moving elements should also work comfortably for people who are sensitive to animation. We adapt transitions to the device's reduced motion preference. A sliding panel can appear immediately instead, with its important explanation still visible. Information that can only be read during an animation gets a permanent place on the page so visitors do not have to watch it again.

For video and automatically changing elements, we discuss whether movement is needed and how visitors can stop it. We avoid effects that take over scrolling or make controls awkward on a small screen. Then we test the same page with reduced motion both enabled and disabled. We check that menus still work and that a simplified transition does not hide text or buttons.

Testing beyond fixed device sizes

A desktop layout can technically fit on a phone and still work badly. Long lines, small buttons, tables, and heavy images require content and technical decisions. We therefore check widths between phone, tablet, and desktop sizes, too. A page can look fine at both extremes while a menu overlaps a button at an intermediate width that those screenshots never show.

We test important pages visually and measure whether components extend beyond the viewport. We check images and complete the agreed tasks on real devices or realistic emulators. Longer copy and zoomed views are part of those checks. This reveals specific faults; a single homepage screenshot does not prove the whole site works responsively.

Improve it and keep it usable

You do not always need a new website to fix mobile problems. We first assess whether the existing HTML and CSS are flexible enough. If a few fixed widths or an awkward menu cause the problem, targeted repairs may be enough. If the theme restricts every change, we explain which parts need rebuilding and why that work is necessary.

After delivery, we show you how to check new copy and images on small screens. Design rules still apply to future pages: a new table or external widget can introduce problems again. Through website maintenance, we can keep testing those changes. Responsive design becomes part of ongoing care rather than only a launch check.

Work with real personality

Digital experiences that feel like the company behind them.

What our clients say

A rotating selection of the reviews clients left on Google and Trustpilot — Dutch reviews shown in English translation.

An average of 4.9 out of 5 stars across 26 Google reviews (September 18, 2026).

5 out of 5 stars on Trustpilot

Working with Seppe is truly pleasant and professional. He is fast, highly skilled, and knows exactly what you need.

Juliette AartsTrustpilot review
5 out of 5 stars on Trustpilot

First and foremost, Seppe is a wonderful person to work with. But he also knows exactly what he is talking about and is not only a good web designer — he also understands the marketing principles that make a website convert. The fact that he truly makes time to listen and exchange ideas makes him a very valuable partner to work with.

Margot De VosTrustpilot review
5 out of 5 stars on Trustpilot

An incredibly kind person. He has already solved quite a few problems for us and always does so with a smile. A big thumbs up for Seppe.

Kris DaemTrustpilot review

How we work together

Clear and personal: you always know what is happening, what I need from you and what the next step is.

  1. Initial conversation

    We discuss your business, your customers, the bottleneck and what the website or workflow needs to achieve.

  2. Choosing a direction

    You get a clear structure and visual direction, with choices I explain in plain language.

  3. Building and testing

    I do the build, share work in progress and check the content, speed, technical quality and mobile usability.

  4. Launch and follow-up

    After launch I stay available for maintenance, performance tracking, and targeted improvements.

No agency, but a senior team

Seppe, freelance web developer and founder of Straffe Sites

At Straffe Sites you work directly with the team. Seppe stays your dedicated point of contact and builds your website; the team supports him with commerce, code and photography where needed. Communication stays direct, and your questions never get lost between account managers.

  • 25+ years of experience
  • 1 point of contact
  • Honest advice without a sales pitch
  • Worldwide clients, delivered remotely

Frequently asked questions

Straightforward answers before you decide whether this service fits your business.

What is responsive web design?

It is an approach in which layout, typography, images and interactions adapt to the available screen space without requiring a separate mobile website.

Is responsive the same as mobile-first?

Not quite. Responsive describes the result; a mobile-first approach starts the design and CSS with the smallest practical viewport and expands from there.

Can my existing website be made responsive?

Sometimes. First we check whether the HTML and CSS are flexible enough. With a rigid theme, a targeted rebuild can be more efficient.

Do you test on real phones?

Yes. Alongside testing at different browser widths, we check key journeys on real devices or realistic emulators.

Does mobile usability affect SEO?

A fast, usable mobile page helps visitors and contributes to the overall page experience. Strong content that answers their question remains just as important.

Terms

Technical terms from this page, explained briefly and linked to the full knowledge base.

Does your website really work on mobile?

Send us your most important page. We’ll check where the content, navigation or interactions break down on small screens.

Discuss your project