GTmetrix vs Yahoo! YSlow

Struggling to choose between GTmetrix and Yahoo! YSlow? Both products offer unique advantages, making it a tough decision.

GTmetrix is a Web Browsers solution with tags like performance, speed, optimization, web-pages.

It boasts features such as PageSpeed and YSlow analysis, Waterfall charts, Page resources breakdown, Performance recommendations, Customizable performance thresholds, PageSpeed API integration, HAR file downloads, Page screenshots, Email reports and pros including Free and easy to use, Detailed performance insights, Actionable optimization recommendations, Customizable performance thresholds, Integrates with other tools via API, Can monitor website changes over time.

On the other hand, Yahoo! YSlow is a Web Browsers product tagged with web-performance, page-speed, optimization.

Its standout features include Grades web page performance, Analyzes page components like JS, CSS, images, Provides optimization tips, Integrates with Firefox and Chrome browsers, Open source tool, and it shines with pros like Easy to use, Helps improve page load speed, Identifies performance bottlenecks, Free to use.

Feature	GTmetrix	Yahoo! YSlow
Overall Score	N/A	N/A
Primary Category	Web Browsers	Web Browsers

Product Overview

GTmetrix

Description: GTmetrix is a free online tool that analyzes web pages for performance, providing a performance score and recommendations to improve speed.

Yahoo! YSlow

Description: YSlow is a Firefox and Chrome browser extension that analyzes web pages and suggests ways to improve their performance based on Yahoo!'s performance best practices. It grades performance and provides tips to optimize page load speed.

Key Features Comparison

GTmetrix Features

• PageSpeed and YSlow analysis
• Waterfall charts
• Page resources breakdown
• Performance recommendations
• Customizable performance thresholds
• PageSpeed API integration
• HAR file downloads
• Page screenshots
• Email reports

Yahoo! YSlow Features

• Grades web page performance
• Analyzes page components like JS, CSS, images
• Provides optimization tips
• Integrates with Firefox and Chrome browsers
• Open source tool

Pros & Cons Analysis

GTmetrix

Pros

• Free and easy to use
• Detailed performance insights
• Actionable optimization recommendations
• Customizable performance thresholds
• Integrates with other tools via API
• Can monitor website changes over time

Cons

• Limited number of free tests per month
• No browser testing
• No visual web optimization
• No A/B testing capabilities
• Only provides recommendations, not fixes

Yahoo! YSlow

Pros

• Easy to use
• Helps improve page load speed
• Identifies performance bottlenecks
• Free to use

Cons

• Limited to Firefox and Chrome browsers
• Suggestions not always applicable
• Can only analyze one page at a time

Pricing Comparison

GTmetrix

• Freemium

Yahoo! YSlow

• Free
• Open Source