OpenCart developers who keep your store selling
OpenCart development for extensions, themes, upgrades, fixes and migrations
Many OpenCart stores have years of products and loyal customers but struggle with old versions, broken extensions and slow pages. Our OpenCart developers fix, upgrade and extend your store, or move it to a new platform when that makes sense.
OpenCart problems we solve
If any of these sound familiar, we can help.
Old OpenCart version
Older versions miss security fixes and modern features.
Broken extensions
Extensions stop working after updates or clash with each other.
Slow store
Old themes and large images slow down your shop.
Checkout issues
Payment and shipping errors lose orders.
Outdated design
The store looks dated on mobile.
Planning a move
You are not sure whether to upgrade or move platform.
Our OpenCart development services
Everything you need to build, launch and grow, from one team.
Extension development
Custom OpenCart extensions and fixes for existing ones.
Theme development
Modern, mobile-friendly OpenCart themes.
OpenCart upgrades
Upgrades to OpenCart 4 with data and extension checks.
Fixes & support
Bug fixes, payment and shipping issues, and ongoing support.
Speed optimisation
Image, cache and code optimisation.
Migration
OpenCart to Shopify, WooCommerce or another platform with SEO-safe redirects.
Our OpenCart process
A clear, step-by-step plan, so you always know what we are doing and why.
Discovery
We learn about your business, customers and goals before writing a line of code.
Plan & quote
A clear scope, timeline, milestones and an itemised quote.
Design
Wireframes and designs focused on your brand and on conversion.
Development
Clean, scalable code built on the right platform, with regular updates.
Testing & launch
Testing on every device and browser, SEO-safe redirects and a monitored go-live.
Support & growth
Ongoing support, maintenance and improvements after launch.
Live websites we have worked on
Real client projects. Click any card to visit the site.
World Auto Parts
SEO and conversion audit for a French car parts store, followed by technical fixes on PrestaShop.
- SEO
- Conversion (CRO)
- Technical fixes
Vault 99
SEO clean-up on a BigCommerce apparel store, including page titles across the catalogue.
- SEO
- On-page optimisation
DTF Distributors
SEO and conversion-rate work on a Magento 2 store selling DTF printing supplies.
- SEO
- Conversion (CRO)
What our clients say
“We needed help with an OpenCart website that had several technical issues. AdvertX Agency worked on the website structure and improved several areas of functionality. They also considered SEO and performance while making the changes. Great technical team and very good communication.”
“Our e-commerce website needed both development and SEO support. The team helped us improve the website structure, product pages, and search optimization. They were responsive whenever we had questions or needed adjustments. Overall, a very smooth and professional experience.”
“The team helped us with both website development and digital marketing. They were able to understand our business requirements and recommend the right solutions. Their combination of web development, SEO, and advertising knowledge was particularly useful. A reliable agency with excellent communication.”
Why choose AdvertX for OpenCart
OpenCart developers, plus SEO and ads in-house
Your site is built SEO-ready and conversion-focused, and the same team can grow it with SEO and paid ads after launch.
Real, live client websites
Our work is public. See the portfolio and visit the sites yourself.
One project manager
A single point of contact, clear milestones and honest updates from start to finish.
Support after launch
Maintenance, fixes and new features once your site is live, so it keeps performing.
OpenCart Development FAQs
We work with OpenCart 2, 3 and 4, including upgrades between versions.
Yes. We fix broken or conflicting extensions and build custom ones when needed.
It depends on your products, budget and plans. We compare the cost of upgrading OpenCart with moving to a new platform and recommend the best option.
Yes. Our OpenCart SEO service helps your store rank higher on Google.
Ready to build something that sells?
Tell us about your project. We will review it for free and send a clear plan and an itemised OpenCart quote.
Prefer email? contact@advertxagency.co.uk