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Published 13 May 2025 in Ecommerce

How to Give a Button Square Corners in Klaviyo

Design details significantly impact your brand's visual identity in email marketing.

by Tyson

Design details significantly impact your brand’s visual identity in email marketing. The shape of your buttons, particularly whether they have rounded or square corners, can affect how well your emails align with your overall brand aesthetic. Many brands prefer clean, modern square-cornered buttons to maintain consistency with their website design, yet Klaviyo defaults to rounded corners for most elements. This guide explores various methods to achieve square corners for your buttons in Klaviyo, ensuring your email marketing maintains visual consistency across all customer touchpoints.

Why Button Corner Style Matters for Brand Identity

Email marketing serves as a direct extension of your brand experience. Every visual element contributes to how customers perceive your business, including seemingly minor details like button corner styles. Square-cornered buttons often convey precision, structure, and modernity, making them popular choices for tech companies, financial institutions, and brands with minimalist aesthetics. Rounded corners, meanwhile, tend to feel more approachable, friendly, and organic, which explains why they’re Klaviyo’s default choice for most users.

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The Psychology Behind Button Shapes

Button shapes influence how users interact with your content on a subconscious level. Square corners draw attention to specific points and create clear visual boundaries that can make content feel more organized and professional. They align perfectly with grid-based designs and create a sense of order that many corporate brands prefer. The sharp edges of square buttons can also create stronger visual contrast against surrounding elements, potentially increasing click-through rates for important calls to action.

Matching Website Experience in Emails

Consistency between your website and email marketing creates a seamless customer experience. Users who click through from your website to your emails (or vice versa) should feel they’re interacting with the same brand. Different button styles across these touchpoints can create subtle cognitive dissonance. Square-cornered buttons in emails that match your website’s aesthetic help reinforce brand recognition and trust through visual consistency.

  • Brand recognition: Consistent button styling strengthens visual identity
  • User experience: Familiar design elements reduce cognitive load
  • Professional appearance: Cohesive styling suggests attention to detail
  • Conversion optimization: Familiar button styles may improve click rates

How to Adjust Button Corner Radius in Klaviyo

Klaviyo provides limited native options for controlling button corner radius, but several approaches can achieve square corners. The platform’s default settings apply rounded corners to most elements, requiring specific techniques to override this behavior. Understanding these methods helps you maintain brand consistency across all your email campaigns.

Using Button Block Corner Radius Settings

Button blocks offer the most straightforward approach to creating square-cornered buttons in Klaviyo. This method requires no coding knowledge and works reliably across most email clients. The process involves adjusting the corner radius setting to zero, effectively removing all rounding from the button edges.

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Start by adding a button block to your email template through Klaviyo’s drag-and-drop editor. Select the button to open its styling options in the right-hand panel. Navigate to the Styles tab where you’ll find the “Corner radius” setting among other styling options. Set this value to 0 (zero) to create perfectly square corners for your button.

This approach works exclusively with button blocks and won’t affect other elements in your template. You can still customize all other aspects of your button, including background color, text styling, padding, and border properties while maintaining the square corners you’ve established.

Template-Level Corner Radius Control

Klaviyo’s newer editor offers template-level styling that affects multiple elements simultaneously. This approach provides a broader solution when you want consistent square corners throughout your email design. The setting applies to the email container and potentially influences how buttons and other elements appear within it.

Access this feature by opening your email template in Klaviyo’s editor and navigating to the Styles tab. Look for the “Corner radius” setting that controls the overall template container’s corner style. Setting this value to 0px establishes square corners as the default throughout your template. This method creates visual consistency across your entire email but offers less granular control than adjusting individual elements.

Advanced Methods for Square-Cornered Buttons

When Klaviyo’s native options don’t provide enough control, more technical approaches can achieve square corners for buttons and other elements. These methods require some familiarity with HTML and CSS but offer greater flexibility and precision for maintaining brand consistency.

Custom CSS Implementation

Custom CSS provides powerful control over button styling in Klaviyo forms and can be adapted for email campaigns. This approach allows you to override Klaviyo’s default styling with your own specifications, including setting border-radius to zero for square corners. The method works particularly well for signup forms where custom CSS can be directly added to the form builder.

To implement this technique, create your form in Klaviyo’s form builder and add a button element. Scroll to the bottom of the styling options and locate the “Custom CSS” section. Add the following code to create square-cornered buttons:

.btn {
  border-radius: 0 !important;
}

The !important declaration ensures your style takes precedence over Klaviyo’s defaults. For more specific targeting, you might need to use class names or IDs that uniquely identify your buttons. This method provides precise control over button appearance and allows you to match your website styling exactly.

HTML Button Customization

Direct HTML editing offers another solution for creating square-cornered buttons in Klaviyo. This approach bypasses the visual editor’s limitations by allowing you to write custom button code with explicit styling properties. The technique works well for email campaigns where you can access the HTML editor.

Switch to Klaviyo’s HTML editor by clicking the “<>” icon in your email campaign editor. Locate the button code, which typically resembles:

Button Text

Modify the style attribute to include border-radius: 0px; along with other desired styling properties:

Button Text

This approach gives you complete control over your button’s appearance and ensures square corners across most email clients. The method requires basic HTML knowledge but offers greater precision than Klaviyo’s visual editor alone.

Alternative Approaches to Square-Cornered Elements

When standard methods don’t achieve the desired results, alternative techniques can create square-cornered buttons and other elements in Klaviyo. These approaches involve creative workarounds that may be particularly useful for complex designs or when facing technical limitations.

Image-Based Button Solutions

Using custom-designed images as buttons presents an alternative when CSS-based approaches prove challenging. This method involves creating button graphics with square corners in an external design tool and importing them into Klaviyo as images. The approach offers complete visual control but comes with important considerations.

Design your button in a graphic design tool like Adobe Photoshop, Figma, or Canva, ensuring it has square corners and matches your brand styling. Save the image with a transparent background as a PNG file to maintain clean edges. In Klaviyo, add an image block instead of a button block, upload your custom button graphic, and add a link to make it clickable.

  • Complete visual control: Design buttons exactly as needed
  • Consistent appearance: Graphics render similarly across email clients
  • Creative freedom: Add textures, gradients, or effects difficult to achieve with CSS
  • Brand accuracy: Match colors and styling precisely

This method has drawbacks, however. Image-based buttons won’t display if recipients have images disabled in their email client. They may also appear pixelated on high-resolution displays and don’t scale as elegantly as CSS-based buttons on different screen sizes.

Border and Padding Technique

The border and padding technique creates square-cornered buttons through careful manipulation of spacing and border properties. This method works within Klaviyo’s HTML editor and produces reliable results across most email clients. The approach uses padding to create the button’s shape and explicit border styling to ensure square corners.

Create a standard button in Klaviyo, then switch to the HTML editor to modify its code. Remove any border-radius properties and add specific border and padding values:

Button Text

This technique creates clean, square-cornered buttons that maintain their shape across various email environments. The combination of padding and borders ensures structural integrity even when some CSS properties aren’t fully supported by certain email clients.

Testing Square-Cornered Buttons Across Email Clients

Creating square-cornered buttons represents only half the challenge-ensuring they render consistently across different email clients completes the task. Email rendering varies significantly between platforms, requiring thorough testing to confirm your design appears as intended everywhere your subscribers might view it.

Common Rendering Challenges

Email clients interpret HTML and CSS differently, creating potential inconsistencies in button appearance. Outlook presents particular challenges for button styling due to its limited CSS support and unique rendering engine. Mobile email apps may also display buttons differently than desktop clients, affecting how square corners appear on different devices.

Testing reveals these inconsistencies before your emails reach subscribers. Send test emails to multiple addresses across different platforms and devices to evaluate how your square-cornered buttons render in various environments. Pay special attention to Outlook versions, which often require additional troubleshooting for consistent button styling.

Troubleshooting Inconsistent Rendering

When buttons don’t appear with square corners as expected, several troubleshooting approaches can help identify and resolve the issues:

  1. Add the !important declaration to your CSS border-radius property to ensure it overrides other styles
  2. Check for nested styles or inherited properties that might conflict with your square corner settings
  3. Verify your HTML code is properly formatted with all opening tags matched to closing tags
  4. Consider using email testing services like Litmus or Email on Acid for comprehensive previews
  5. Create fallback styling that maintains visual appeal even if square corners don’t render perfectly

Maintaining Brand Consistency Across Platforms

Square-cornered buttons represent just one element of your overall brand identity. Creating a cohesive visual experience requires attention to multiple design aspects across all marketing channels. Systematic approaches ensure consistency between your Klaviyo emails, website, and other customer touchpoints.

Documentation and Templates

Creating comprehensive style documentation helps maintain consistency across campaigns and team members. Document your button specifications, including dimensions, colors, padding, font choices, and corner radius settings (0px for square corners). This reference guide ensures anyone creating marketing materials follows the same standards.

Develop reusable templates with properly styled square-cornered buttons for future campaigns. These templates reduce the need to recreate elements from scratch each time, ensuring consistent styling across all communications. Store these templates in an accessible location for all team members involved in email creation.

Cross-Platform Alignment Strategies

Aligning button styling between Klaviyo and your website creates a seamless customer experience. Work with your web development team to ensure button styles match across platforms, focusing on corner radius, colors, padding, and typography. This coordination may require collaboration between marketing and development departments but results in stronger brand consistency.

  • Style guide implementation: Create comprehensive documentation covering all button properties
  • Asset sharing: Maintain a library of approved button styles and code snippets
  • Regular audits: Periodically review emails and forms to ensure consistent styling
  • Team training: Educate all content creators on brand standards for buttons

Square Up Your Email Marketing Today

Implementing square-cornered buttons in Klaviyo strengthens your brand identity and creates visual consistency across marketing channels. The techniques outlined in this guide provide multiple approaches suitable for different skill levels and requirements. Whether you prefer simple adjustments within Klaviyo’s native features or more advanced HTML customization, you can achieve professional-looking square-cornered buttons that align perfectly with your brand aesthetic.

Start by identifying which method best suits your needs based on your technical comfort level and specific design requirements. Test your implementation across multiple email clients to ensure consistent rendering, and document your approach for future campaigns. Remember that visual consistency extends beyond button corners to include colors, typography, spacing, and overall design language.

Your email marketing represents a crucial touchpoint with customers and prospects. By maintaining consistent visual elements like square-cornered buttons, you create a more professional, cohesive experience that reinforces brand recognition and trust. The attention to detail demonstrated through consistent design elements communicates quality and professionalism that resonates with your audience and strengthens their connection to your brand.

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