- Hiding Fields on the Checkout Page
- Installing WooCommerce
- Using WooCommerce
- Adding Products in WooCommerce
- Using Your Theme's Header & Footer in a Step
- Embedding a Checkout Form on the Checkout Page
- Hiding WooCommerce Pages and Products
- Using Pricing Tables
- Adding an Affiliate Program
- Setting a Funnel as the Homepage
- Dynamic Offers aka Rule Engine
- Instant Layout for Checkout and Thank You Step
- Adding Products from the URL to the Checkout Page
- Setting Up Split Testing for Steps
- Deleting Plugin Data During Uninstallation
- Importing Ready-Made Templates for Funnels and Steps
- Importing and Exporting Funnels and Step
- URL Parameters
- Replacing the Main Checkout Order with an Upsell or Downsell
- Rolling back to a Previous Version
- Using the "Order Custom Field" Rule of Dynamic Offers with Custom Field Editor
- Optin
- Separate Orders
- Setting Up Pre-Checkout Upsell
- Refund Offer
- Applying a Coupon from the URL
- How to Create a Direct Buy-Now Checkout Link for a Product
- How Coupons Work in CartFlows?
- User role manager
- Instant Layout for Upsell and Downsell
- CartFlows Smart Login
- How to Set Preferred Countries on the Checkout Page
- CartFlows Product Options
- Google Address Autocomplete
- Flatsome UX Builder
- ActiveCampaign
- Paypal Reference Transactions
- How PaypPal/Stripe Works
- Enabling Enfold Avia Layout Builder
- Setting Up Authorize.net for Upsell & Downsell
- Supported Payment Gateways
- Setting Quantity and Discount for Products on the Checkout Page
- Adding Custom Payment Gateway Support for One-Click Upsell and Downsell
- Funnel in Test Mode
- Troubleshooting Plugin and Theme Conflicts
- Resolving the "Please Select a Simple, Virtual, and Free Product" Error
- Fixing Endless Loading on the Checkout Page
- Fixing the "We can't seem to find an order for you." Error on the Thank You Page
- Troubleshooting License Activation Issues
- Fixing the "Checkout ID Not Found" Error
- Fixing the "Session Expired" Error Message
- Resolving "Order Does Not Exist" Error on Upsell/Downsell Page
- Fixing the "Sorry, This Product Cannot Be Purchased" Error
- Disabling Auto-fill of Address Fields Based on Zip Code
- Enabling Theme's Scripts & Styles Without Changing Page Template
- Disabling Auto-fill of Checkout Fields
- Allowing Cache Plugins to Cache CartFlows Pages
- Changing the "Choose a Variation" Text
- VAT Field Not Displaying for WooCommerce EU/UK VAT Compliance Plugin
- Enabling the Product Tab on Store Checkout
- Displaying the Order Summary Open on Mobile Devices
- Refreshing the Checkout Page After CartFlows AJAX Calls
- Overview
- Installing Modern Cart Starter
- Installing Modern Cart Pro
- Activating License Key
- Customizing General Settings
- Customizing Cart Tray Labels
- Customizing Cart Icon Settings
- Customizing Cart Tray Styling
- Understanding the Product Recommendations Feature
- Controlling Product Recommendation Source for Empty Cart
CartFlows Instant Checkout
CartFlows Pro includes a feature called Instant Checkout that lets shoppers buy a product straight from the product page, without ever leaving it. A Buy Now button appears next to your existing Add to Cart button, and clicking it opens the full checkout, order bumps and all, in a popup right there on the page.
This guide walks you through how Instant Checkout works, how to turn it on for a funnel, and what the experience looks like for your shoppers.
How Instant Checkout Works
When Instant Checkout is turned on for a funnel, CartFlows automatically adds a Buy Now button next to Add to Cart on that funnel’s product page. Nothing needs to be placed manually.
- The shopper clicks Buy Now, and a checkout popup opens right on top of the product page. Their browsing cart is set aside for the moment, not lost.
- Inside the popup, they move through checkout, review any order bumps, and pay, all without a single page reload.
- If they close the popup without finishing, their original cart is restored exactly as it was. If they complete the order, the funnel’s upsell and downsell steps take over next, just like a normal CartFlows checkout.
Pricing shown in the popup is always calculated by your store, so shoppers are only ever charged what they were shown.
How to Set Up Instant Checkout
Instant Checkout is configured per funnel, so you can turn it on for some funnels and leave others as they are. Which funnel you enable it on determines which products get the Buy Now button:
- Enable it on Store Checkout to add the Buy Now button to every product page in your store, with no extra setup per product.
- Enable it on a regular funnel to use that funnel’s checkout for one or more specific products. You’ll also need to assign the funnel to each of those products, since a funnel’s Instant Checkout setting only applies to products pointed at it.
Step 1. From the WordPress admin, go to CartFlows → Funnels and open the funnel you want to update. The funnel needs a checkout step already set up and published.
Step 2. Open the funnel’s settings and click the Instant Checkout tab.

Step 3. Turn on Enable Instant Checkout.
Step 4. Under Popup Layout, pick one of the two layouts:
- Two Pane — the full three-step checkout (contact, address, payment) with an order summary shown alongside the form.
- QuickBuy — a compact, single-column popup with a shorter two-step checkout (details, then payment) and the order total shown in a fixed strip.
Step 5. Set the Button Text shown on the product page. It reads “Buy Now” by default, but you can change it to match your store’s voice.
Step 6. Optionally, upload a Custom Logo to show inside the popup. If you leave this empty, your site’s logo is used, or your store’s initials if you don’t have one set.
Step 7. Use the Design section to match the popup to your store, including the primary color, heading and text colors, background colors, and base font size.
Step 8. Click Save Settings.
If you enabled Instant Checkout on Store Checkout, you’re done, the Buy Now button is now active across your store. If you enabled it on a regular funnel instead, continue to Step 9 to point specific products at that funnel.
Step 9. Open the product in Products → All Products, scroll to the Product data section, and click the CartFlows tab. Under Select the Flow, choose the funnel you just updated, then update the product.

Instant Checkout is now active for that product.
The Instant Checkout Popup in Action
Once Instant Checkout is on, shoppers see the Buy Now button right next to Add to Cart on the product page.

Clicking it opens the popup without leaving the page.

Any order bumps you’ve set up on the funnel’s checkout step appear in the popup too, including quantity controls and, for variable products, the usual size or color options.

On Mobile Devices
The popup adjusts to fit smaller screens, keeping the same steps and order summary in a compact, full-width layout.

Working with Coupons
If you have Power Coupons installed, shoppers can enter a coupon code right inside the popup to apply any offers available to them, without leaving checkout.
Coupons applied inside the popup only apply to that purchase. If the shopper closes the popup without completing the order, their original cart and its own coupons come back untouched.
Frequently Asked Questions
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