In Klaviyo How to Make a Fill Out Form

Klaviyo forms serve as a powerful tool for collecting valuable customer information that can fuel your email marketing strategy. These forms function as the primary gateway for growing your subscriber lists, enabling you to establish meaningful connections with potential customers who aren’t quite ready to make a purchase. When implemented correctly, Klaviyo forms can significantly enhance your customer acquisition efforts and provide valuable data for segmentation and personalization.

What Are Klaviyo Forms and Why Do They Matter?

Before diving into form creation, it’s essential to understand that Klaviyo offers various form types including popups, flyouts, embedded forms, full-page forms, and banners. Each form type serves different purposes and appears differently on your website. Popups appear in the middle of the browser window and are highly effective but potentially disruptive. Flyouts emerge from the edge of the page, offering a less intrusive experience. Embedded forms integrate seamlessly into specific sections of your website, while full-page forms capture maximum attention by covering the entire browser window.

The effectiveness of your Klaviyo forms depends largely on proper integration with your website. To ensure forms display correctly, you’ll need to verify that Klaviyo sign-up forms are enabled on your website and that the Klaviyo integration is properly installed. This integration creates a communication channel between your website and Klaviyo, allowing form submissions to be captured and processed within your Klaviyo account. With these fundamentals in place, you’ll be well-positioned to create forms that not only look great but also perform effectively in growing your subscriber base.

Modern email marketing success hinges on building quality subscriber lists through strategic form placement and design. Klaviyo’s form builder provides businesses with customizable options to capture leads, engage visitors, and gather valuable insights that boost marketing revenue. The platform’s sophisticated targeting capabilities ensure your forms appear to the right audience at the optimal moment, maximizing conversion potential while maintaining a positive user experience.

Form Types and Their Strategic Applications

Each Klaviyo form type serves specific marketing objectives and user experience goals. The most effective form types for different marketing scenarios include:

• Popup Forms: Deliver the highest conversion rates due to their prominent placement and attention-grabbing nature, making them ideal for capturing visitors who might otherwise leave without subscribing
• Flyout Forms: Provide a middle ground by appearing from screen edges with less disruption while still maintaining visibility and conversion potential
• Embedded Forms: Offer the most seamless user experience by integrating directly into your website’s content flow, working particularly well on dedicated landing pages, blog posts, or product pages
• Full-Page Forms: Create maximum impact by covering the entire browser window, making them perfect for special promotions or exclusive offers that warrant undivided attention
• Banner Forms: Provide consistent visibility without interrupting the browsing experience, ideal for ongoing list-building efforts

The key to successful form implementation lies in matching form types to specific marketing goals and user contexts. Popup forms excel at capturing abandoning visitors, while embedded forms work best for engaged readers consuming your content. Understanding these nuances allows you to create a comprehensive form strategy that maximizes subscriber acquisition across different touchpoints and user behaviors.

Setting Clear Goals for Your Form Strategy

Before creating your Klaviyo form, establishing clear objectives is crucial for maximizing effectiveness. Start by asking yourself: What specific outcome do you want to achieve with this form? Are you primarily focused on collecting email addresses, phone numbers for SMS marketing, or gathering more detailed customer information? Perhaps you’re looking to cross-channel audience acquisition by converting email subscribers to SMS subscribers. Having a well-defined goal will guide your form design decisions and targeting strategy.

Successful sign-up forms adhere to three fundamental principles that drive higher conversion rates. First, keep your style simple—overloading a form with too many elements distracts visitors and decreases conversion rates. Focus on making it easy for visitors to understand and complete your form without feeling overwhelmed. Second, design for the total experience—consider what happens before, during, and after someone encounters your form. This includes thoughtful placement, timing, and the follow-up communication subscribers receive.

Third, collect the right data—strategically decide what information is essential versus what might create friction in the signup process. For new subscriber acquisition, multi-step forms represent best practice, particularly when collecting both email and SMS consent. This approach allows you to present information sequentially, reducing perceived complexity. However, if you’re focusing on cross-channel acquisition from existing subscribers, a single-step form asking only for a phone number can be more effective.

Defining Success Metrics and KPIs

Establishing measurable success criteria helps you evaluate form performance and make data-driven improvements. Primary metrics include form view rates, submission rates, and conversion percentages, which provide insights into how many visitors see your form and how many complete the signup process. Secondary metrics encompass email deliverability rates, engagement levels of new subscribers, and revenue generated from form-acquired customers over time.

Advanced analytics should track subscriber quality by monitoring open rates, click-through rates, and purchase behavior of form-acquired contacts compared to other acquisition channels. This data reveals whether your forms attract genuinely interested prospects or merely inflate subscriber numbers without driving meaningful engagement. Additionally, tracking form abandonment points helps identify friction areas where visitors start but don’t complete the signup process.

Consider implementing cohort analysis to understand the long-term value of subscribers acquired through different form types and placements. This approach reveals which forms generate the most valuable customers, enabling you to allocate resources toward the highest-performing strategies. By aligning form goals with broader business objectives and tracking relevant metrics, you create a foundation for continuous optimization and sustainable list growth.

Creating Your First Klaviyo Form

Creating your first Klaviyo form is a straightforward process that begins in your Klaviyo dashboard. Navigate to “Sign-up Forms” in the left navigation menu and click “Create Form” in the top right corner. You’ll be presented with two options: building from a template in Klaviyo’s form library or creating a new sign-up form from scratch. For beginners, the template approach is recommended as these forms are designed with best practices in mind and can be easily customized to match your brand.

When selecting a template, you can filter options by form type (popup, flyout, etc.) or goal to find the most suitable starting point. After choosing your template, you’ll need to name your form and select the list that form submissions will be added to. If you’re creating a multi-step form that collects both email and phone numbers, you can select different lists for each type of contact information. For SMS subscribers, Klaviyo will automatically create a dedicated list if you don’t already have one.

If you prefer starting with a blank canvas, select “Create new form” and specify details like form name, subscriber list, form type, and data protection options. Once these initial settings are configured, click “Save and design” to enter the form editor where you’ll customize your form’s appearance and functionality. Remember that regardless of which approach you choose, you’ll need at least one submission for Klaviyo to properly recognize events and triggers associated with your form.

Navigating the Form Editor Interface

The Klaviyo form editor provides an intuitive drag-and-drop interface that simplifies the design process while offering powerful customization options. The main workspace displays a real-time preview of your form, allowing you to see changes immediately as you make them. The left sidebar contains design tools organized into logical sections: Styles for overall appearance, Add Blocks for content elements, and Settings for behavior configuration.

The Styles section controls fundamental design elements including colors, fonts, spacing, and overall form dimensions. This area allows you to maintain brand consistency by matching your form’s appearance to your website’s design language. The Add Blocks section provides various content elements such as text blocks, images, input fields, buttons, and specialized components like countdown timers or coupon displays.

The top navigation bar includes essential functions like Preview, which shows how your form appears on different devices, and Success, where you customize the post-submission experience. The Targeting and Behaviors tab contains sophisticated options for controlling when, where, and to whom your form displays. Familiarizing yourself with these interface elements streamlines the form creation process and enables you to leverage Klaviyo’s full feature set effectively.

Designing an Effective Form Layout

The visual design of your Klaviyo form plays a crucial role in its effectiveness. Form design directly impacts user perception, trust, and willingness to share personal information. A well-designed form should feel like a natural extension of your website, maintaining visual consistency while standing out enough to capture attention. Color psychology plays a significant role—warm colors like orange and red create urgency, while cool colors like blue and green convey trust and reliability.

Typography choices affect readability and user experience across different devices and screen sizes. Select fonts that are easily readable on both desktop and mobile devices, ensuring adequate contrast between text and background colors. Maintain consistent font sizes and weights throughout your form to create visual hierarchy and guide users through the signup process. White space usage prevents forms from feeling cluttered and overwhelming, allowing users to focus on essential elements.

Visual elements like images, icons, and graphics should support your form’s primary objective without creating distractions. High-quality product images or lifestyle photos can increase conversion rates by showcasing the value subscribers will receive. However, avoid using too many visual elements that might slow loading times or compete for attention with your call-to-action buttons. The goal is creating a clean, professional appearance that builds trust and encourages form completion.

Optimizing Form Elements for Conversion

Strategic placement and design of form elements significantly impact conversion rates. Essential elements that maximize form effectiveness include:

• Compelling Headlines: Clearly communicate the value proposition using action-oriented language that creates excitement about joining your list, such as “Get Exclusive Deals” or “Join Our VIP Community”
• Clear Input Fields: Use logical organization and visible labels that remain visible when users start typing, with appropriate input types for mobile optimization
• Contrasting Buttons: Design call-to-action buttons with colors that stand out from your form background and include compelling action words like “Get My Discount” or “Start Saving Now”
• Smart Defaults: Implement progressive disclosure and pre-select common options like country codes to reduce perceived complexity and form abandonment rates

Consider implementing smart defaults and progressive disclosure to reduce perceived complexity. For example, pre-select the most common country code for phone number fields or show additional fields only after users complete initial required information. These subtle improvements can significantly reduce form abandonment rates while maintaining the information quality you need for effective marketing campaigns.

Targeting the Right Audience with Your Form

Effective audience targeting dramatically improves form conversion rates by ensuring your form appears to the right people at the right time. Klaviyo’s robust targeting capabilities allow you to precisely control when, where, and to whom your forms display. Navigate to the “Behaviors and Targeting” tab in the form editor to configure these essential settings. Under display timing, you can set forms to appear after a specific time delay, when visitors reach a certain scroll depth, or when they exhibit behavior by moving their cursor toward the browser’s close button.

Display frequency settings help prevent form fatigue by controlling how often the same visitor sees your form. For optimal user experience, configure forms to appear again after several days if closed, but never reappear if submitted. This approach respects user decisions while providing reasonable opportunities for conversion. Device targeting allows you to specify whether your form displays on desktop, mobile, or both device types, enabling you to tailor the experience to different browsing contexts.

The “Targeting” tab offers powerful audience segmentation options that can dramatically improve conversion rates. You can target forms based on visitor location, device type, list membership, URL parameters, cart contents, and more. For example, to maximize list growth, you might set a form to display only to visitors who don’t have existing Klaviyo profiles. A particularly effective strategy for popup forms is to trigger them when visitors are leaving the page, setting the frequency to show again after five days if closed but never again after submission, and targeting only non-subscribers.

Advanced Targeting Strategies

Behavioral targeting enables sophisticated form personalization based on user actions and engagement patterns. Targeting captures visitors who are about to leave your site, offering a final opportunity to convert them into subscribers. This approach typically yields higher conversion rates because it targets users who have already demonstrated interest by browsing your content but haven’t yet committed to a purchase.

Geographic targeting allows you to customize form content and offers based on visitor location, which is particularly valuable for businesses with region-specific promotions or shipping considerations. Time-based targeting can display different forms during business hours versus evenings, or show special weekend offers to maximize relevance. URL-based targeting enables you to show specific forms on particular pages, such as displaying product-specific signup incentives on individual product pages.

Referral source targeting helps you create customized experiences for visitors arriving from different channels. Social media visitors might see forms emphasizing community aspects, while search engine visitors might encounter forms highlighting informational content. This level of personalization increases relevance and conversion potential by aligning form messaging with visitor expectations and motivations.

Publishing and Testing Your Form

Before publishing your Klaviyo form, conduct a thorough review to ensure everything functions correctly. The form editor provides helpful alerts in the bottom left corner, highlighting any issues that need attention before your form goes live. These might include missing button text, incomplete fields, or compliance concerns. Addressing these alerts is crucial for creating a professional, effective form that converts visitors into subscribers without encountering technical problems.

When you’re ready to publish, click the “Publish” button in the editor. If you’ve properly integrated your site with Klaviyo, your form will immediately go live on your website according to the targeting criteria you’ve established. For embedded forms, there’s an additional step: you’ll need to copy the generated embed code and paste it into the appropriate location on your website. This might be a specific page section, sidebar, or footer area depending on your design plans.

Testing your published form is a critical step that’s often overlooked but essential for ensuring optimal performance. Visit your website in an incognito browser to simulate a new visitor experience, particularly if your form is set to hide from existing Klaviyo profiles. Ensure you meet all the form’s targeting criteria when testing—if your form is configured to appear after three seconds and when behavior is detected, wait for the time delay and then simulate the behavior by quickly moving your cursor toward the browser’s close button.

Comprehensive Testing Protocols

Systematic testing across multiple devices and browsers ensures your form performs consistently for all visitors. Test your form on various screen sizes, from large desktop monitors to small mobile devices, verifying that all elements remain readable and functional. Pay special attention to button sizes, input field dimensions, and text readability on smaller screens where space constraints can impact user experience.

Browser compatibility testing prevents technical issues that could block form submissions or create poor user experiences. Test your form in major browsers including Chrome, Firefox, Safari, and Edge, checking for consistent appearance and functionality. Mobile browser testing is particularly important since mobile users often have different interaction patterns and expectations compared to desktop users.

Performance testing ensures your form loads quickly and doesn’t negatively impact your website’s overall speed. Slow-loading forms can increase bounce rates and reduce conversion potential. Use tools to measure form loading times and optimize images or other elements that might cause delays. Additionally, test form submission processes to verify that data reaches your Klaviyo account correctly and that confirmation messages display properly.

Automating Follow-Up with Form Submissions

Once visitors complete your Klaviyo form, the real magic happens through automated follow-up sequences that nurture new subscribers and guide them toward becoming customers. Create a welcome flow triggered by additions to your form’s subscriber list to immediately engage new contacts and deliver on any promised incentives. This automation serves as the critical bridge between form submission and ongoing customer relationships, setting the tone for future interactions with your brand.

To set up this automation, navigate to the “Flows” section in Klaviyo and create a new flow using your form’s list as the trigger. Configure the first email to send immediately after subscription, delivering any promised offers like discount codes or free shipping. This prompt delivery is crucial for maintaining trust and encouraging immediate engagement with your brand. Subsequent messages in the flow can introduce your brand story, showcase bestselling products, or share valuable content relevant to new subscribers.

For forms offering incentives like discount codes, consider adding a reminder email 24-48 hours later for those who haven’t used their coupon. This gentle nudge can recover potentially lost sales without appearing pushy. Additionally, you can create branching logic within your flow based on subscriber actions, sending different follow-up content to those who clicked on specific products or categories in previous emails. This personalized approach significantly improves engagement rates compared to generic sequences.

Building Sophisticated Welcome Sequences

Advanced welcome flows incorporate multiple touchpoints and personalization elements that create memorable first impressions. The most effective welcome sequence structure includes:

• Immediate Confirmation: Send an instant acknowledgment email that confirms the subscription and delivers promised incentives while reflecting your brand personality
• Brand Introduction: Follow up 2-3 days later with storytelling content, social proof, and behind-the-scenes information that builds emotional connections
• Product Showcase: Present bestselling items or personalized recommendations based on signup source or expressed interests
• Value-Added Content: Share educational resources, user-generated content, or exclusive insights that demonstrate ongoing value beyond promotional offers

Segmentation within welcome flows enables more targeted messaging based on subscriber characteristics or behaviors. New subscribers who immediately use discount codes might receive product recommendation emails, while those who don’t engage might receive educational content or additional incentives. This dynamic approach ensures each subscriber receives relevant content that matches their engagement level and interests, improving long-term retention and customer lifetime value.

Leveraging Advanced Form Features

Klaviyo offers several advanced form features that can significantly enhance your subscription strategy beyond basic data collection. Gamification elements like spin-to-win forms create interactive experiences that boost engagement and conversion rates. These features transform the traditional signup process into an entertaining experience that visitors actively want to participate in, often resulting in higher completion rates and more positive brand associations.

Countdown timers create urgency by displaying limited-time offers, driving faster conversions through psychological triggers related to scarcity. This feature works particularly well for seasonal promotions, flash sales, or exclusive launches where time sensitivity adds value to the offer. Social proof elements like signup counters display how many people have already subscribed, leveraging the psychological principle that people are more likely to take actions that others have already taken.

Advanced targeting capabilities enable sophisticated personalization based on visitor behavior, location, and previous interactions with your brand. You can create different form experiences for first-time visitors versus returning customers, or show location-specific offers based on geographic data. Multi-step forms with conditional logic allow you to collect detailed information without overwhelming subscribers, showing different questions based on previous answers to create personalized experiences.

Implementing Compliance and Security Features

Bot protection automatically safeguards your forms from fraudulent submissions that could damage your sender reputation and skew your analytics. Klaviyo implements CAPTCHA verification only when suspicious behavior is detected, maintaining a smooth user experience for legitimate visitors while blocking automated submissions. This invisible protection ensures your subscriber lists remain high-quality without adding friction to the signup process.

Data protection features help you comply with privacy regulations like GDPR and CCPA by providing transparent information about data collection and usage. These features can automatically include required disclosure language and consent checkboxes based on visitor location, ensuring compliance across different jurisdictions. Age verification features enable businesses selling age-restricted products to collect necessary information while maintaining regulatory compliance.

Double opt-in functionality, while optional, significantly improves list quality by ensuring subscribers genuinely want to receive your communications. This feature sends a confirmation email requiring subscribers to verify their email address before being added to your list. Though it may slightly reduce initial signup numbers, double opt-in dramatically improves engagement rates and deliverability by ensuring only genuinely interested subscribers join your list.

Optimizing Forms for Maximum Conversion

Maximizing form conversion rates requires continuous testing and refinement of your approach through systematic A/B testing. Klaviyo’s built-in A/B testing capabilities allow you to test different form elements and identify the combinations that resonate most strongly with your audience. Consider testing variables like form timing, headline copy, button text, incentive offers, and design elements to optimize performance based on real user behavior rather than assumptions.

AI-powered optimization tools can automatically test multiple display timing variations to find the highest-converting approach. These tools run continuous experiments in the background, automatically selecting winning variations and implementing them without manual intervention. This approach ensures your forms are always optimized for current audience behavior and preferences.

Mobile optimization deserves special attention given that mobile traffic often represents the majority of website visitors. Forms that perform well on desktop may create friction on smaller screens, potentially driving away valuable subscribers. Pay special attention to font sizes, button dimensions, and overall form size when designing for mobile users. Klaviyo’s mobile preview functionality allows you to see exactly how your form will appear on smartphones and tablets.

Advanced Testing Strategies

Strategic A/B testing goes beyond simple element changes to test fundamental assumptions about user behavior and preferences. Test different value propositions to understand what motivates your audience—do they respond better to discount offers, exclusive content, or early access to new products? Test various form lengths to find the optimal balance between information collection and conversion rates.

Timing tests can reveal optimal display moments for different audience segments. Forms typically show higher conversion rates than immediate popups because they target visitors who have already demonstrated interest by browsing your content. However, the optimal timing may vary based on your specific audience and industry, making testing essential for finding your best approach.

Seasonal and contextual testing helps you understand how external factors influence form performance. Holiday shopping seasons, industry events, or current events might affect how visitors respond to different messaging or offers. Regular testing ensures your forms remain optimized for changing conditions and audience preferences over time.

Maintaining Compliance and List Health

Maintaining compliance with email and SMS marketing regulations is non-negotiable when collecting subscriber information through Klaviyo forms. Always include clear, explicit language about what subscribers can expect to receive and how often they’ll hear from you. For SMS collection, specific carrier-required disclosure language must be present, and the phone number field must be on a separate step from email collection to maintain compliance with recent carrier updates.

Privacy regulations like GDPR, CCPA, and CAN-SPAM have specific requirements regarding data collection and processing that vary by region and subscriber location. Ensure your forms include links to your privacy policy and terms of service, clearly explaining how you’ll use subscriber information. Klaviyo’s data protection fields feature can help implement these requirements consistently across your forms, automatically displaying appropriate compliance language based on visitor location.

Beyond legal compliance, maintaining list health is crucial for long-term marketing effectiveness and deliverability. Quality always trumps quantity when it comes to subscriber lists—engaged subscribers who regularly open and interact with your emails are far more valuable than large numbers of unengaged contacts. Implementing double opt-in for email subscribers, though it may slightly reduce initial signup numbers, significantly improves engagement metrics and deliverability.

Proactive List Management Strategies

Regular list cleaning removes unengaged subscribers who haven’t opened emails over extended periods, which might seem counterintuitive but actually improves overall engagement rates and sender reputation. Most email service providers use engagement metrics to determine inbox placement, so maintaining high engagement rates increases the likelihood that your messages reach interested subscribers’ inboxes rather than spam folders.

Essential list management practices that maintain subscriber quality include:

• Regular Engagement Monitoring: Track open rates, click-through rates, and interaction patterns to identify subscribers who may no longer be interested in your content
• Segmentation Strategies: Create targeted groups based on signup source, engagement level, purchase history, or demographic information to send more relevant content
• Preference Centers: Allow subscribers to control their email frequency and content types, reducing unsubscribe rates while providing valuable data about subscriber interests
• Re-engagement Campaigns: Implement win-back sequences for inactive subscribers before removing them from your list, giving them opportunities to re-engage with your brand

Preference centers allow subscribers to control their email frequency and content types, reducing unsubscribe rates while providing valuable data about subscriber interests. Rather than losing subscribers entirely, preference centers enable them to receive less frequent emails or focus on specific topics that interest them most. This approach maintains relationships while respecting subscriber preferences and improving overall list health.

Transform Your Marketing with High-Converting Forms

Creating effective Klaviyo forms represents a fundamental shift from passive list building to proactive subscriber acquisition that drives measurable business results. The strategies outlined throughout this guide provide a comprehensive framework for designing, implementing, and optimizing forms that not only capture contact information but also create positive first impressions that set the stage for long-term customer relationships. Success with Klaviyo forms requires balancing user experience with conversion optimization, ensuring your forms provide value to visitors while achieving your marketing objectives.

The key to sustained success lies in treating form optimization as an ongoing process rather than a one-time setup task. Regular testing, performance monitoring, and strategic refinements based on real user behavior data enable continuous improvement that adapts to changing audience preferences and market conditions. By implementing the advanced features, targeting strategies, and compliance measures discussed in this guide, you’ll create forms that not only grow your subscriber base but also attract high-quality leads who are genuinely interested in your products and services.

Your Klaviyo forms should serve as the foundation for sophisticated marketing automation that nurtures subscribers through personalized welcome sequences, targeted product recommendations, and timely promotional offers. When combined with proper list management practices and compliance protocols, these forms become powerful tools for building sustainable, profitable customer relationships that drive long-term business growth. Start implementing these strategies today to transform your website visitors into engaged subscribers and loyal customers who contribute meaningfully to your bottom line.