Page analysis tools break down web pages into sized components and calculate download speeds at different bandwidths. They can be used to help pinpoint where your problem pages are, and show which parts of these pages need your attention. They can also be used to validate your code, spell-check your text, check accessibility, check your links, and even compute search engine visibility. Having well-formed valid code makes your visitor's browser work less parsing your code. Here are some popular webpage analysis tools.1. Blaze.io/mobile: Test your website on a number of mobile devices to speed up web page load times on mobiles.2. Watson.addy.com: HTML and Link validation, spell checking, site popularity, search engine compatibility, and download speed and more. 3. Dynatrace.com: DynaTrace is a powerful tool that analyzes web page load times, and JavaScript execution times and bottlenecks. Developed in-house to help in JavaScript development for dynaTrace Software, DynaTrace AJAX edition lets you zoom in on JavaScript and page bottlenecks to locate code that is slowing your pages down.4. Loads.in: Tests how fast your web page loads from different countries using different browsers. Also provides waterfall chart and HAR files.5. Netmechanic.com: Fix your HTML pages and optimize your images at NetMechanic.com.6. Pagespeed.googlelabs.com: Web-based version Google's Page Speed software that analyzes web pages against web performance best practices, detailed in Steve Souders' two books from O'Reilly, High Performance Web Sites, and Even Faster Web Sites.7. Showslow.com: Free service that measures and tracks website performance over time. The tool helps you track performance over time = goal is it getting your site faster. There is a private label version (an instance) where you can set up your own instance to show your boss your website's story, and set up beacons. By Sergey Chernyshev. 8. Jigsaw.w3.org/css-validator: Check your CSS based on the W3C specifications.9. Validator.w3.org: The de-facto XHTML markup validation service checks your XHTML and finds errors based on W3C specifications.10. Webpageanalyzer.com: HCI-based web page size and speed analyzer. Breaks pages down into sized components, pinpoints problem areas, and offers advice based on HCI research.11. webpagetest.org: This is an enhanced online version of AOL's open source Page Test software. Times web page load times from different locations, using different browsers, and provides waterfall charts and performance guidelines from Pagespeed. Also can create loading videos to show the loading sequence of web pages.12. Developer.yahoo.com/yslow: Like its newer brethren Page speed, Yahoo's free browser plug-in analyzes web pages against web performance best practices. In addition to checklists of best practices, creates charts showing the statistical breakdown of web page components. Created initially by Steve Souders.

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