Routing external landing pages to your root domain via the Sply dashboard

Launching new landing pages, product drop funnels, and lead quizzes is standard practice for growth teams. Attaching those pages to your primary brand domain historically required engineering intervention.

With Sply, routing any third-party builder (Webflow, Tilda, Marquiz, Shopify, Unbounce) to a root domain subdirectory takes a three-click workflow.

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1. 3-minute setup workflow#

Step 1: Open the "Web Routing" section#

Log into your Sply dashboard, select your domain, and navigate to Web Routing ➔ + New Route.

Step 2: Configure route parameters#

Fill in three fields:

┌────────────────────────────────────────────────────────────────────────┐
│ SPLY EDGE ROUTE CONFIGURATION                                          │
├────────────────────────────────────────────────────────────────────────┤
│ 1. Inbound Root Subdirectory Path:                                     │
│    yourbrand.com [ /summer-sale-2026                         ]         │
│                                                                        │
│ 2. Upstream Destination Host:                                          │
│    [ https://campaign-project.webflow.io                     ]         │
│                                                                        │
│ 3. Header & Context Policies:                                          │
│    [x] Rewrite Set-Cookie headers to root domain (yourbrand.com)       │
│    [x] Preserve query parameters (gclid, fbclid, utm_*) across jumps   │
│    [x] Enable Edge SSL Termination (Automatic Let's Encrypt)           │
└────────────────────────────────────────────────────────────────────────┘

Step 3: Activate route#

Click "Deploy to Edge". Within five seconds, the route propagates across Sply's edge fleet.

Visitors opening yourbrand.com/summer-sale-2026 see your visual builder page, while 1st-party cookies, session tokens, and tracking tags remain bound to your primary domain.

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2. Background proxy transformations#

While the page streams to the visitor, Sply handles proxy operations:

• Asset path rewriting: converts relative and absolute paths for images, CSS, and JS bundles to eliminate Mixed Content warnings.
• 1st-party cookie re-issuance: translates session cookies set by the upstream builder into authentic 1st-party cookies for your root domain.
• Edge static caching: caches static images and scripts at the edge, reducing repeat load times.

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Next steps#

• Interactive test: Deploy Your First Custom Edge Route on Sply in 3 Minutes.
• Next in series: The economics of server-side tracking: calculating ROI for growth teams.