I will build a custom interactive calculator or lead form

M
matthewfrd
M
matthewfrd
Matthew
4.3
4.3

About this gig

Need a specific feature that your website builder cant handle? I build high-performance, custom interactive components with clean JavaScript and HTML.

Stop struggling with heavy plugins or limited templates. I specialize in coding the "brains" of your websitecreating lightweight, custom-coded elements that work exactly how you need them to.

What I can build for you:

  • Interactive Tools: Custom calculators (ROI, mortgage, pricing), quizzes, and converters.
  • Smart UI Elements: Multi-step forms, advanced filter systems, and custom sliders.
  • Dynamic Components: Accordions, modal windows, and interactive data charts.
  • JS Logic Fixes: Debugging and optimizing your existing scripts for better performance.

Why this gig?

  • Vanilla JS Expertise: No unnecessary librariesjust fast, efficient, hand-coded logic.
  • Seamless Integration: My code is structured to be easily dropped into your existing site.
  • Responsive & Clean: Every component is mobile-ready and W3C validated.

Note: This service is for functional components and logic. I provide the code and the interaction; if you need specific styling to match your brand, please provide your CSS requirements.

Respect third-party rights

Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.

Get to know Matthew

Matthew

Frontend Logic Developer

4.3(1)
  • FromGeorgia
  • Member sinceNov 2025
  • Avg. response time1 hour
  • Last delivery1 month
  • Languages

    English, Georgian, Russian
👋 Hi, I'm Matthew! I specialize in the "brains" of the frontend. While others focus only on looks, I build high-performance, logic-driven websites with GSAP animations. I leverage AI tools for rapid, modern styling (CSS) to ensure lightning-fast delivery, allowing me to focus 100% of my manual expertise on custom JavaScript logic and semantic HTML5 structure. What I offer: ✅ Custom JS Functionality & Logic ✅ Clean, SEO-ready HTML5 ✅ Personalised AI for your business ✅ Fully Responsive Layouts ✅ GSAP animations I deliver functional web tools that work perfectly. Let’s build your project!
Reviews

1 reviews for this Gig
4.3

(0)
(1)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    4
  • Quality of delivery
    5
  • Value of delivery
    4
Sort By
Most relevant
  • K
    image-docs

    kkrreate

    US

    United States

    4.3

    Great turnaround time for this experimental project. I will be coming back for more projects.

    Up to $50

    Price

    5 days

    Duration

    Helpful?
    Yes
    No
Reviews

1 reviews for this Gig
4.3

(0)
(1)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    4
  • Quality of delivery
    5
  • Value of delivery
    4
Sort By
Most relevant
  • K
    image-docs

    kkrreate

    US

    United States

    4.3

    Great turnaround time for this experimental project. I will be coming back for more projects.

    Up to $50

    Price

    5 days

    Duration

    Helpful?
    Yes
    No