Website Validation, Speed and Performance Optimization

A list of links with speed tests, tools and techniques to optimize page speed and the overall website performance.

Speed

• Google PageSpeed Insights
  Analyzes the content of a web page, then generates suggestions to make that page faster.

• GTmetrix
  Gives insights on how well the site loads and provides actionable recommendations on how to optimize it.

• Pingdom Website Speed Test
  Enter a URL to test the page load time, analyze it, and find bottlenecks.

• KeyCDN Website Speed Test
  A page speed test that includes a waterfall breakdown and the website preview.

• Varvy SEO tool
  See how well a page follows the Google guidelines.

Validation

• W3C Markup Validation Service (HTML Validator)
  Checks the markup (HTML, XHTML, …) of Web documents.

• W3C CSS Validation Service (CSS Validator)
  Checks Cascading Style Sheets (CSS) and (X)HTML documents with style sheets.

• W3C Feed Validation Service (Feed Validator)
  Checks the syntax of syndicated feeds (Atom or RSS feeds).

• PowerMapper
  Checks any website for broken links, spelling errors, browser compatibility, accessibility, web standards validation and search engine issues.

• IONOS Website Checker
  Reviews the four most important aspects for your website’s online success: website presentation, search engine visibility, website security, website’s performance.

Test Tools

• Google Mobile-Friendly Test
  Tests how easily a visitor can use your page on a mobile device.

• Find Broken Links, Redirects and Site Crawl Tool
  Check All the Links on a Website

• Broken Link Checker
  Scans webpages for dead hyperlinks.

• W3C Link Checker
  Checks your web pages for broken links.

Other Tools

• CSS Sprites Generator
  #1

• CSS Sprites Generator
  #2

• Base 64 Image Encoder
  Create data streams for embedding images.

• TinyJPG
  Compress JPEG images intelligently.

• HTML Minifier
  A highly configurable, JavaScript-based HTML minifier.

• HTTP Header Check
  Online curl test to analyze HTTP Response Headers.

• Easy Counter
  Get a website analyzed and accurately described in terms of WHOIS record, traffic stats, metadata, safety, subdomains, server details and more.

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Categories & Tags

• website
• test
• tools

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