App page software with custom CSS/JS unleashed

Experience the potential of app page creator with custom CSS/JS and seamlessly craft high-performing landing pages specific to various ads and audiences. Drive conversions, boost brand credibility, and cultivate lasting customer loyalty.

Note: Some features described here might be planned in our roadmap but not yet released. You can open a live chat from within your account and our Support team can offer more details or help you with workarounds.
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Build landing pages Build landing pages Build landing pages at scale without coding

With Instapage’s intuitive drag-and-drop page builder with diverse design features, over 5,000 fonts, and 33 million images, anyone can easily create professional-looking, top-performing landing pages without technical or design skills.

Boost results Boost results Increase conversions with fast-loading pages

Reduce bounce rates and increase engagement with lightning-fast landing pages. Our Thor Render Engine™, back-end technology delivers 3x faster-loading landing pages so you won't lose a single lead.

Build landing pages Build landing pages Boost productivity with AI content generation

Scale page creation and overcome writer’s block or generate copy variations for A/B tests with the AI Content Generator. Create high-quality and engaging content for each audience and ad group, including paragraphs, CTAs, or entire copies directly in the Instapage builder.

Maximize campaign Maximize campaign Make the most of analytic insights

Get data-backed insights about your campaigns and page performance so you can test and optimize for higher ROI. Track visitors, conversions, conversion rates, cost-per-visitor, and cost-per-lead in real time. View heatmaps to understand user behavior - all without leaving Instapage.

Power up landing Power up landing Optimize traffic with AI experiments

Improve page performance fast with an AI-powered experimentation tool. It tracks your ongoing experiments and directs traffic to top-performing page variations, no matter how many versions you have. Achieve faster optimization insights without sacrificing the quality of your results.

Improve alignment across Improve alignment across Secure your business data

Instapage safeguards business data and your customer's privacy with enterprise-grade security measures, including SSL certification, two-factor authentication, SSO, and more. Instapage also maintains compliance with GDPR, SOC 2, and CCPA regulations.

Build landing pages that get results
Vita raises lead generation efforts and experiences with a 250% MQL growth using Instapage
Boost results through landing page optimization
Vita raises lead generation efforts and experiences with a 250% MQL growth using Instapage
Personalize experiences for higher engagement and ROI Personalize experiences for higher engagement and ROI sidebar
Vita raises lead generation efforts and experiences with a 250% MQL growth using Instapage
Maximize campaign efficiency with ad mapping Maximize campaign efficiency with ad mapping sidebar
Vita raises lead generation efforts and experiences with a 250% MQL growth using Instapage
Power up landing pages with AI Power up landing pages with AI sidebar
Vita raises lead generation efforts and experiences with a 250% MQL growth using Instapage
Improve alignment across your creative team sidebar
Vita raises lead generation efforts and experiences with a 250% MQL growth using Instapage
Build landing pagesBuild landing pages at scale without coding
With Instapage’s intuitive drag-and-drop page builder with diverse design features, over 5,000 fonts, and 33 million images, anyone can easily create professional-looking, top-performing landing pages without technical or design skills.
Boost resultsIncrease conversions with fast-loading pages
Reduce bounce rates and increase engagement with lightning-fast landing pages. Our Thor Render Engine™, back-end technology delivers 3x faster-loading landing pages so you won't lose a single lead.
Build landing pagesBoost productivity with AI content generation
Scale page creation and overcome writer’s block or generate copy variations for A/B tests with the AI Content Generator. Create high-quality and engaging content for each audience and ad group, including paragraphs, CTAs, or entire copies directly in the Instapage builder.
Maximize campaignMake the most of analytic insights
Get data-backed insights about your campaigns and page performance so you can test and optimize for higher ROI. Track visitors, conversions, conversion rates, cost-per-visitor, and cost-per-lead in real time. View heatmaps to understand user behavior - all without leaving Instapage.
Power up landingOptimize traffic with AI experiments
Improve page performance fast with an AI-powered experimentation tool. It tracks your ongoing experiments and directs traffic to top-performing page variations, no matter how many versions you have. Achieve faster optimization insights without sacrificing the quality of your results.
Improve alignment acrossBuild landing pages at scale without coding
Instapage safeguards business data and your customer's privacy with enterprise-grade security measures, including SSL certification, two-factor authentication, SSO, and more. Instapage also maintains compliance with GDPR, SOC 2, and CCPA regulations.

Mastering App page creation with custom CSS/JS using Instapage

Creating effective app pages is crucial for marketers looking to boost conversions and user engagement. Instapage's powerful platform empowers marketers in the USA to streamline the landing page creation process, leveraging custom CSS/JS to enhance functionality and aesthetics without needing extensive coding skills.

Understanding App page creators with custom CSS/JS

App page creators are tools that allow users to build web pages specifically optimized for lead generation and conversions. Custom CSS and JavaScript enhance these pages by enabling unique designs and interactivity that cater to specific audiences. With Instapage's extensive library of conversion-focused layouts and Instablocks, you can develop bespoke landing pages efficiently.

  1. No coding needed: Instapage offers a user-friendly interface that simplifies app page creation, allowing marketers to focus on creativity rather than technical skills.
  2. Wide customization options: With custom CSS and JavaScript, your app pages can stand out with personalized designs tailored to your brand identity.
  3. A/B testing capabilities: Instapage supports built-in experimentation features to maximize page effectiveness through A/B testing.

Step 1: Setting up your App page

Begin by selecting a template from Instapage's library. This selection sets the foundation for your app page. Ensure that the chosen layout aligns with your marketing objectives.

  1. Choose a responsive design: Prioritize templates that perform well on both desktop and mobile devices to maximize user engagement.
  2. Incorporate your branding: Use brand colors, fonts, and logos to ensure consistency across all marketing channels.
  3. Utilize dynamic text replacement: This feature allows you to personalize content based on user data, enhancing relevance.

Step 2: Customizing with CSS and JS

Utilize the custom CSS/JS functionalities to refine your app page's look and feel. Personalization increases user interaction and completion rates.

  1. Modify styles: Implement CSS for specific elements to improve visual appeal and user experience.
  2. Add interactivity: Use JavaScript to include features like pop-ups or animations, making the page more engaging.
  3. Optimize loading times: Consider the balance between aesthetics and performance when adding custom scripts.

Step 3: Analyzing performance

Post-publication, evaluate your app page's effectiveness using Instapage's analytics dashboard. This tool provides insights into user behavior, conversion rates, and overall page performance.

  1. Monitor heatmaps: Understand user interactions to identify areas needing improvement.
  2. Set up goals: Establish clear conversion goals to measure the success of your app page.
  3. Iterate based on data: Use performance insights to refine your approach and optimize your app pages continually.

In summary, leveraging a robust app page creator like Instapage combined with custom CSS/JS enables marketers to create dynamic, effective landing pages that drive conversions and enhance user experience.

Get started today with Instapage to elevate your marketing strategy and optimize your app pages for maximum impact!

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“Instapage gives us the ability to tailor our landing page content and layout to tell a unique story for each geographical target. The platform also enables us to create different variations with content that performs well for each unique channel. Every marketing team needs this!”
User review
Tamar Friedland, Sr. Director of Global Paid Marketing
"Instapage has truly maximized our digital advertising performance by enabling us to offer matching, personalized experiences for every ad and audience. Now we can scale our landing page experiences as efficiently and effectively as we scale the ads themselves."
User review
Darren Lepke, Marketing Director
"If we have to wait on a developer, our creative velocity plummets. But Instapage has made it possible for us to exponentially grow our advertising programs and convert more customers"
User review
Alex Kracov, Head of Marketing

Leading the way in building high-performing landing pages

Grid Leader - Summer 2025
Best Est. ROI Enterprise - Summer 2025
Most Implementable Enterprise - Summer 2025
Fastest Implementation Enterprise - Summer 2025
High Performer - Summer 2025

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See app page creator with custom css/js in action

See app page creator with custom css/js in action

In this tutorial, Bibek introduces the 18th episode focused on SharePoint modern sites. He emphasizes the importance of subscribing to his channel for future tutorials. The primary objective of this episode is to add custom CSS and JavaScript using app customizers. Before that, he outlines the necessary tools required on the user's machine. He instructs users to search for the SPFX Yeoman generator online and follow the link to set up their development environment. Essential installations include Node.js, which must be downloaded if not already installed, a code editor (Visual Studio Code), Gulp, Yeoman, and the SharePoint generator. The tutorial guides users through the installation commands for Gulp and Yeoman.

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