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Customizing the Tonder SDK: What You Can Change and Why It Matters

https://docs.tonder.io/hosted-checkout/guides/customize-checkout-ui

Yuyo avatar
Written by Yuyo
Updated over 2 weeks ago

The Tonder SDK is built to be flexible, secure, and easy to integrate. Whether you’re launching payments for the first time or want a tailored checkout experience, the SDK lets you control how your users interact with payments — without sacrificing security or speed.

This article explains what aspects of the Tonder SDK you can customize, why those options matter, and how they help create a smoother, on-brand experience.


Why Customization Matters

Out-of-the-box checkout flows are fast to launch, but every business is unique.

Customizing your payment experience helps you:

  • Match your brand identity — colors, fonts, layout

  • Reduce friction — optimized fields and flows based on user context

  • Increase conversions — look and feel aligned with your product

  • Stay compliant and secure — without compromising control over the experience

The Tonder SDK strikes a balance between security (trusted payment flows) and flexibility (what your users see and feel).


What You Can Customize

1. Visual Appearance

You can style the checkout so it feels like a natural part of your app or site:

  • Brand colors and accents
    Match the SDK to your corporate palette.

  • Typography and text styles
    Choose fonts and sizes consistent with your interface.

  • Button styles and labels
    Customize how actions look and what they say.

Result: Users feel at home — the payment flow looks like your product, not an external popup.


2. Layout and Flow

Not all products work the same way, and neither should payment screens.

You control:

  • Placement of fields

  • Order of steps in your flow

  • Which elements are shown or hidden

This means you can tailor the experience to your audience — for example:

  • Remove unnecessary fields for returning users

  • Highlight specific payment methods

Result: Faster checkout with fewer distractions.


3. Messaging and Labels

Every business uses its own language.

With the SDK, you can customize:

  • Field labels (e.g., “Card Number” vs “Payment Details”)

  • Action text (“Pay Now”, “Submit”, “Confirm”)

  • Error and validation messages

This lets you maintain a consistent voice throughout the user journey.


4. Supported Payment Features

The Tonder SDK supports modern payment capabilities — and you decide which ones to enable:

  • Stored cards / one-click checkout (if allowed)

  • 3D Secure flows

  • Alternative payment methods (e.g., wallets, SPEI)

  • Installments or split payments (when supported)

Result: You tailor payment methods to your users and region.


What You Don’t Have to Worry About

One of the biggest advantages of using the Tonder SDK is that security, compliance, and backend complexity are handled for you. You don’t need to manage:

  • PCI compliance

  • Sensitive input handling (card numbers, CVV)

  • Tokenization and secure storage

  • Fraud and risk enforcement rules

These aspects are built into the SDK, letting your team focus on product experiences instead of infrastructure.


How Customization Works (High Level)

Customization in the Tonder SDK works through:

  • Configuration settings
    — Define styles, colors, and feature flags

  • UI parameters
    — Tailor what users see

Depending on the environment (web, mobile, hosted checkout), the SDK exposes options that let you make these choices before rendering the payment interface.


Start Simple — Scale Up

Even if you start with default styles, you can:

  1. Launch quickly

  2. Collect user feedback

  3. Gradually tailor the experience

  4. Optimize for higher conversions

This flexibility lets teams innovate without bottlenecks.


Summary: What You Control

Customization Area

Why It Matters

Visual Styles

On-brand experience

Layout & Flow

Faster, clearer checkout

Text & Messaging

Consistent tone and reduced confusion

Activated Features

Relevant payment methods for your users


Final Thought

The Tonder SDK is not a fixed “black box.”

It’s a platform you can shape to fit your product, your users, and your brand — with security and performance handled behind the scenes.

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