How to Add Custom Css to All My Sites Without Editing Each One Individually?

HOWTO

Style every site at once — Apply custom CSS globally with Summrly’s centralized design control

Welcome

Get started with Summrly

Create Your First Topic

Set up your content focus

Add Keywords

Optimize for search engines

Brand Details

Tell us about your business

Complete Setup

Start creating content

Get Started with Summrly

Let's get you set up with your first content topic. This will only take a few minutes.

What to Expect

We'll guide you through 5 simple steps to create your first content topic:

Choose a topic - The main subject you want to create content about
Add keywords - Terms your audience searches for
Set brand details - Tell us about your business
Select template - Choose your content layout
Start creating - Generate your first content

Brand Details & Template

Tell us about your business and choose a content template

Why this matters

This information helps us tailor the content to your brand's voice and style. We'll use it to:

Match your brand's tone and personality
Incorporate your unique value propositions
Reference your products/services naturally
Maintain consistency across all content

Brand Name*

Website URL We'll use this to understand your existing content

Contact Email*

AI API Key Leave blank to use our default key

Preferred Content Tone*

Tone Preview:

Our professional tone creates content that is polished, well-researched, and authoritative while maintaining clarity and precision in communication.

Select Template

Choose a layout for your content

Published on: | Author: Summrly Team

One Code, Every Site — Apply Custom CSS Across All Your Websites

If you're copying and pasting CSS into 10 different sites, you're wasting time. With Summrly, you can add custom CSS once — and apply it to all your websites instantly. Whether you want rounded buttons, custom animations, or unique layouts, make global design changes in seconds, not hours.

Why a Content-First Website Solves This

Summrly treats design like content: it’s centralized and reusable. When you add custom CSS in your brand settings, it automatically syncs across every site using your template. No need to open each site’s editor. No risk of missing one. Just consistent, professional styling — everywhere.

Step-by-Step Guide

Create Your First Topic
Set Up Your Content Focus
Add Keywords
Brand Details (Add Custom CSS in One Place)
Complete Setup — CSS Applies to All Connected Sites

Enter your topic below and start building websites where your custom styles work everywhere — automatically.

Real Results in 6–12 Weeks

A developer wanted all 15 client sites to have animated hover effects on buttons. Instead of editing each one, he added 3 lines of CSS in Summrly’s global settings. All 15 sites updated instantly — saving over 5 hours of manual work.

Q? Can I add custom CSS for all my sites at once?
Yes. Add CSS in your brand settings and it applies globally.
Q? Can I override CSS for a single site?
Absolutely. Apply site-specific CSS that overrides the global rules when needed.
Q? Do I need coding skills?
Only if you want to. Most users rely on built-in styling — but coders can go deeper.
Q? Will updates break my design?
No. Your CSS is preserved during template or platform updates.
Q? Is this good for agencies or teams?
Perfect. Maintain design consistency across client or brand sites effortlessly.

You shouldn’t have to repeat the same code over and over. With Summrly, a single CSS update can transform dozens of websites — keeping your design sharp and your workflow simple.

Enter your topic below and launch your first site with the power to style them all from one place.