Pinch, zoom and scroll sideways
Text is tiny, tables overflow and visitors have to zoom just to read a phone number.
Responsive Website Development One website that works on every screen.
Most of your visitors now arrive on a phone. We rebuild outdated, desktop-only websites as fast, mobile-first sites that adapt to any phone, tablet or laptop, while keeping your content, URLs and Google rankings intact. 21 years of web development, tested on real devices.
- Mobile-first design
- Desktop-to-mobile conversion
- Fluid layouts & breakpoints
- Real-device testing
- Core Web Vitals
- Accessible by design
21+years building websites and web applications
7500+projects delivered for clients in India and abroad
320–2560pxscreen widths every layout is designed and tested for
Freemobile-friendliness and speed audit of your current site
Signs your site isn't mobile-ready
Six problems a responsive rebuild fixes.
Google indexes the mobile version of your website first, and most buyers will judge you on a five-inch screen. A desktop-era site costs you both rankings and enquiries.
Buttons and forms too small to tap
Links sit too close together and form fields are fiddly, so mobile enquiries never get sent.
Slow on 4G and patchy networks
Full-size desktop images and heavy scripts load on phones too, so pages crawl outside office Wi-Fi.
Falling mobile search rankings
Search Console reports mobile usability and Core Web Vitals issues, and rankings slip as a result.
A separate 'm.' site to maintain
An old mobile sub-domain shows different content, splits SEO signals and doubles every update.
Broken on tablets and big screens
Layouts tuned for one laptop size stretch, overlap or leave huge gaps on iPads and wide monitors.
Responsive web development services
Responsive website development for new and existing sites.
Whether you need an outdated website converted or a new mobile-first build, every page is designed for the smallest screen first and enhanced as the screen grows.
Mobile-First Design
Layouts, navigation and calls to action planned for thumbs and small screens first, then scaled up to desktop.
Read more about Mobile-First DesignDesktop-to-Responsive Conversion
Rebuild an old fixed-width or table-based website as a fluid, responsive site without losing content or rankings.
Read more about Desktop-to-Responsive ConversionFluid Grids & Breakpoints
CSS Grid and Flexbox layouts with breakpoints set by your content, not by a single device size.
Read more about Fluid Grids & BreakpointsCross-Device & Cross-Browser Testing
Every template checked on real Android phones, iPhones, iPads and desktop browsers before launch.
Read more about Cross-Device & Cross-Browser TestingMobile Speed & Core Web Vitals
Responsive images, lazy loading and lean code so pages load quickly on mobile data.
Read more about Mobile Speed & Core Web VitalsAccessibility (WCAG 2.2)
Readable type, sufficient contrast, tap-target sizes and keyboard support for every visitor.
m.-Site Consolidation
Merge a separate mobile sub-domain into one responsive site with redirects and a single set of content.
Responsive Email & Landing Pages
Campaign pages and HTML email templates that render cleanly in mobile inboxes and browsers.
Responsive UI Kits
A component library of buttons, cards, tables and forms that adapts automatically, for your team to reuse.
Mobile-first design
Designed for the phone first, then scaled up.
Starting with the smallest screen forces clear priorities: what the visitor needs, in what order, and how they contact you. We design thumb-friendly navigation, sticky call and WhatsApp buttons, and short forms, then add columns, imagery and detail as screens get wider.
- Content priority set for small screens before desktop
- Thumb-friendly menus, 48px tap targets and sticky contact bar
- Click-to-call, WhatsApp and maps links that just work
- Short, mobile-optimised forms with the right keyboards
Convert an existing website
Make an old website mobile-friendly without starting from zero.
If your current site's content and design still work on desktop, a responsive conversion can be faster than a full redesign. We audit every page, rebuild the templates with modern, fluid CSS, carry across your content and keep the same URLs, or map 301 redirects where they must change, so search rankings are protected.
- Page-by-page audit of layout, speed and mobile usability
- Templates rebuilt in HTML5 and CSS Grid or Flexbox
- Content, images and SEO data migrated and checked
- URL preservation or a full 301 redirect map
Fluid layouts & breakpoints
Layouts that reflow cleanly from phone to wide monitor.
We set breakpoints where your content needs them rather than for one popular device. Dashboards collapse into cards, tables become stacked lists, sidebars move below the content and navigation turns into a bottom bar, as in this Sysfo product that runs on the same code on a tablet and a phone.
- Fluid grids with CSS Grid, Flexbox and container queries
- Responsive tables, charts and data-heavy screens
- Navigation patterns tuned for phone, tablet and desktop
- Fluid typography that scales smoothly between sizes
Cross-device testing
Tested on real phones, not just a resized browser window.
Emulators miss problems that real devices reveal: notches, on-screen keyboards covering inputs, Safari quirks and slow mid-range Android handsets. Every template is checked on physical devices and the main browsers before launch, and issues are logged with screenshots and fixed on a staging site.
- Android and iPhone handsets, plus iPad and Android tablets
- Chrome, Safari, Edge, Firefox and Samsung Internet
- Portrait and landscape orientation checks
- Test log with screenshots signed off before go-live
Mobile speed & Core Web Vitals
Fast on mobile data, not just on office Wi-Fi.
A responsive layout is only half the job if the page still downloads desktop-sized assets. We serve correctly sized WebP images with srcset, defer non-essential scripts, inline critical CSS and cache aggressively, then measure Largest Contentful Paint, Interaction to Next Paint and layout shift on a throttled mobile connection.
- Responsive images with srcset, WebP and lazy loading
- Critical CSS, deferred JavaScript and font optimisation
- CDN and browser caching configured on your hosting
- Core Web Vitals measured before and after the rebuild
What you get
A responsive website, with the evidence that it works.
Alongside the live site you receive the audits, test results and files behind it, so you can see exactly what improved and keep building on it.
- Mobile-friendliness and speed audit of your current site
- Mobile-first wireframes and responsive page designs
- A responsive website tested on real phones, tablets and desktops
- Device and browser test log with screenshots
- Before-and-after Core Web Vitals report
- 301 redirect map and Search Console checks after launch
- Full source code and a reusable responsive component library
Mobile readiness reportSample output · figures are illustrative
Before → after a responsive rebuild
Mobile performance91
Mobile LCP2.1s
Layout shift (CLS)0.03
Tap targets passed100%
Accessibility96
Rebuild plan
AuditWeek 1
- Device & speed audit
- Content inventory
Design & buildWeeks 2–5
- Mobile-first templates
- Fluid layouts & images
- Content migration
Test & launchWeeks 5–6
- Real-device testing
- Redirects & go-live
How a responsive rebuild works
From desktop-only to mobile-first in five steps.
A fixed quote after the free audit, a staging site you can check on your own phone, and weekly progress updates.
-
1
Free mobile audit
freeWe test your current site on real devices and in Lighthouse, then share the issues and a fixed, itemised quote.
-
2
Content & layout plan
about 1 weekContent inventory, priorities for small screens and mobile-first wireframes for each template.
-
3
Responsive design & build
2–4 weeksTemplates designed and coded with fluid grids, responsive images and accessible components on a staging site.
-
4
Real-device testing
about 1 weekPhones, tablets and desktop browsers in both orientations, with every issue logged and fixed.
-
5
Launch & monitor
launch + 30 daysRedirects, go-live, then Search Console and Core Web Vitals monitored for a month after launch.
Engagement models
Choose how far the rebuild should go.
Start with the free audit. It tells you whether a conversion or a full redesign gives better value.
Mobile audit
Free
Find out exactly how your site performs on phones.
- Real-device and Lighthouse checks
- Prioritised list of issues
- Fixed quote for the fixes
Responsive conversion
Fixed price
Keep your content and look, rebuild the code for every screen.
- Templates rebuilt mobile-first
- Same URLs or full redirect map
- Real-device testing and launch
Mobile-first redesign
From a quote
A new design and structure, built responsive from the start.
- UX, wireframes and new visual design
- CMS, SEO and speed set-up
- Content migration included
Why Sysfo
Responsive web developers who sweat the small screen.
We build data-heavy web applications that have to work on a delivery partner's phone as well as an office monitor, and bring the same discipline to your website.
Mobile-first by habit
Our own products, from milk delivery to MLM ERP, are used mostly on phones, so we design for small screens first.
A real device lab
Templates are tested on physical Android phones, iPhones and tablets, not only in browser emulators.
Rankings protected
URL preservation, redirect maps and post-launch Search Console checks keep existing traffic safe.
Speed you can measure
Before-and-after Core Web Vitals figures show the real improvement on mobile connections.
Accessible for everyone
Contrast, tap-target size, focus states and screen-reader labels follow WCAG 2.2 guidance.
Honest scoping
If a conversion will do, we won't sell you a redesign. The audit shows which option gives better value.
FAQ
Responsive Website Development — frequently asked questions
What is responsive website development?
Responsive website development is building one website whose layout, images and navigation adapt automatically to the screen it is viewed on, from a small phone to a wide desktop monitor. It uses fluid grids, flexible images and CSS breakpoints, so there is a single set of content and one URL for every page, which is what Google recommends.
Can you make my existing website mobile-friendly?
Usually, yes. If the content and branding still work, we can convert the existing site by rebuilding its templates with responsive HTML and CSS, then migrating your content and keeping the same URLs. If the site is very old or the structure no longer fits your business, a mobile-first redesign may be better value. The free audit tells you which.
How much does responsive website development cost?
It depends on the number of page templates, how much content needs migrating, any features such as forms, booking or a store, and whether a conversion or a redesign suits you. After the free mobile audit we give you a fixed, itemised quote, so you know the full cost before work starts.
How long does it take to convert a website to responsive?
A typical responsive conversion of a business website takes four to six weeks: a week for the audit and content plan, two to four weeks for design and development, and about a week of real-device testing and launch. Large sites with many templates or complex features take longer, and we confirm the timeline in the quote.
What is the difference between responsive and mobile-first design?
Responsive design means the layout adapts to any screen size. Mobile-first is the approach we use to get there: designing and coding for the smallest screen first, then adding columns and detail as the screen grows. It produces lighter pages, clearer priorities and better mobile performance than shrinking a desktop design.
Will a responsive website improve my Google rankings?
Google uses mobile-first indexing, so it ranks your site mainly on its mobile version. Responsive website development removes mobile usability errors, improves Core Web Vitals and merges duplicate mobile pages, all of which support better rankings. It isn't a guarantee of position one; content and links still matter, and our SEO team can help with those.
Is a responsive website the same as a mobile app?
No. A responsive website runs in the browser and adapts to the screen, but isn't installed. If you need features such as home-screen install, offline use or push notifications without an app store, a progressive web app is the next step. Our mobile web app development team builds those, often on top of a responsive site.
Which devices and browsers do you test on?
We test on current and recent Android phones and iPhones, iPads and Android tablets, and on laptops and wide desktop monitors. Browsers include Chrome, Safari, Edge, Firefox and Samsung Internet, in both portrait and landscape orientation. You receive the test log with screenshots before launch.
Do you offer responsive website development outside Lucknow?
Yes. We are based in Lucknow and offer responsive website development to businesses across India and abroad. Audits, design reviews and progress meetings happen over video calls, and you can check the staging site on your own phone at any time during the project.
Get mobile-ready
Book a free mobile audit of your website.
Send us your website address. We'll test it on real phones and tablets, share what's holding it back and send a fixed quote for a responsive rebuild within one business day.
- Free real-device audit
- Fixed, itemised quote
- Same URLs or full redirect map
- Tested on real phones and tablets
- Before-and-after speed report
- You own the source code