🚀 Advanced Critical CSS Extraction

Extract Critical CSS
In Seconds

Boost your website performance by extracting above-the-fold CSS with our advanced critical CSS generator. Perfect for developers and agencies.

90%

Faster Loading

50ms

Processing Time

100%

Accurate

Trusted by 10,000+ developers worldwide • No credit card required

Why Choose Our Critical CSS Generator?

Built by developers, for developers. Extract critical CSS with precision and speed.

⚡

Lightning Fast

Extract critical CSS in under 50ms. Our optimized engine processes websites faster than any competitor.

🎯

Pixel Perfect

Advanced viewport detection ensures 100% accurate above-the-fold CSS extraction for any device.

🔧

Developer Tools

REST API, webhooks, batch processing, and CLI tools. Integrate seamlessly into your workflow.

📱

Multi-Device

Generate critical CSS for mobile, tablet, and desktop viewports simultaneously.

🛡️

Enterprise Security

SOC2 compliant with enterprise-grade security. Your data is protected at all times.

📊

Performance Analytics

Detailed reports showing performance gains, file size reduction, and optimization metrics.

🎨 Critical CSS Generator

Enter any website URL and extract above-the-fold CSS in seconds

🌐 Website URL

🛠️ Method for generating Critical CSS

PurgeCSS Recommended UnCSS DropCSS Recommended Critical Recommended Playwright Without Browser

Recommended Methods: PurgeCSS, Critical, DropCSS

🔍 Auto-detect CMS and use optimized plugin for CSS preload

Our system will automatically detect WordPress, Joomla, Magento, and other popular CMS platforms and apply the appropriate optimization plugin.

Critical CSS for SEO Optimization

Improve your Core Web Vitals and search rankings with optimized above-the-fold CSS extraction

🚀 Boost Core Web Vitals

Critical CSS extraction directly improves your Largest Contentful Paint (LCP) and Cumulative Layout Shift (CLS) scores.

✓ Reduce LCP by up to 40%
✓ Eliminate render-blocking CSS
✓ Improve First Contentful Paint

📈 Higher Search Rankings

Google uses page speed as a ranking factor. Our critical CSS generator helps you achieve better SEO performance.

✓ Faster page load times
✓ Better mobile experience
✓ Improved user engagement

PageSpeed Score

Average improvement with critical CSS optimization

Developer-First API

Integrate critical CSS extraction into your build process with our powerful REST API

🔌 REST API

Simple HTTP endpoints for critical CSS extraction

                            POST /api/v1/extract

                            {

                              "url": "https://example.com",

                              "viewport": "1920x1080"

                            }

🔔 Webhooks

Get notified when extraction is complete

                            {

                              "event": "extraction.completed",

                              "job_id": "abc123",

                              "download_url": "..."

                            }

⚡ Batch Processing

Process multiple URLs simultaneously

✓ Up to 100 URLs per batch
✓ Parallel processing
✓ Progress tracking

🛠️ CLI Tool

Command line interface for automation

                            npm install -g @criticalcss/cli

                            criticalcss extract https://example.com

🔧 How Critical CSS Extraction Works

Our advanced algorithm analyzes your website and extracts only the CSS needed for above-the-fold content

🌐

URL Analysis

Our system fetches and analyzes your webpage structure, identifying all CSS resources

📱

Viewport Simulation

We simulate different device viewports to determine what content appears above the fold

⚡

CSS Extraction

Advanced algorithms extract only the CSS rules needed for above-the-fold rendering

🎯

Optimization

The extracted CSS is minified and optimized for maximum performance gains

Simple, Transparent Pricing

Start free, scale as you grow. No hidden fees, no surprise charges.

Free

per month

✓ 5 extractions per hour
✓ Basic viewport sizes
✓ Community support
✗ API access

Pro

$29