This collection of website tools is mainly for SEO, but there’s a number of general checkers in here as well. If you have a great tool that should be included, or know of one, please drop me a line or leave a comment
Accelerated Mobile Pages (AMP)
With AMP, websites can publish incredibly fast and pre-cached mobile pages for visitors. The AMP standard is open and available to everyone, and relies on a pared down implementation of HTML (with special ‘amp-[tag]’ markup), CSS, and JavaScript. Mostly used by content publishers, but with a growing adoption among e-commerce sites.
- AMP Tutorial
- AMP documentation
- AMP Validation from Google
- AMP Project AMP validation tool
- AMP project roadmap
Coding References
Google Updates Tracking
- Google Algorithm Change History from moz
- Panguin Timeline from Barracuda Digital
Health Checks & Validators
Mostly these are relevant for more technical audits and checking implementations. Also see “Structured Data / Schema” below.
- Facebook Debugger
- Regex 101 – Hugely useful for creating and troubleshooting regex, good learning resource at Regular-Expressions
- Sonarwhal – Runs multiple tests
- Twitter Card Validator
- W3 Validator for HTML & XML
- XML Sitemap Checker from Yandex
- Schema Markup / Structured Data Testing Tool
Machine Learning, Deep Learning & AI
- Cheat Sheets Collection from BecomingHuman.ai
Pagespeed Tools
Pagespeed can impact natural search performance, and is a strong user experience consideration. Faster pages lead to more engaged users and slower pages often mean visitors leave the site, or use it less due to frustration.
For organic search, slow pages mean more exits back to search engine results from a website. If this happens frequently, search engines see this as a negative signal.
- Bulk Pagespeed Analysis from Rob Hammond
- Bulk Photo Resizing
- GT Metrix
- Lighthouse – Runs multiple tests from Chrome Dev Tools (in browser)
- Use Lighthouse Viewer to open saved reports
- PageSpeed Insights from Google
- Performance Budget Builder tool by Brad Frost. Learn more here
- Potential Revenue Impact for Mobile
- Test My Site for mobile pages, from Google
- WebPageTest (likely) most advanced around, and free
PHP Setup and Management
- PHP Installation Wizard for CentOS from RemiRepo
Servers & Hosting
- HTTP/2 Test
- SSL Labs HTTPS Test
- HTML Boilerplate .htaccess file – Well commented and comprehensive
- DNS Records Checker
- Nameserver Lookup
Structured Data / Schema
- Structured Data Linter from structured-data.org
- Structured Data Testing Tool from google
- Rich Results Test from google
Tools & Tool Collections
- SEO Tools from Rob Hammond
Unicode
- Scarfboy unicode codepoint lookup tool
- Babelstone unicode lookup tool
- Unicode Table incl search. Good for copy & paste non-printing characters
- Fileformat.info unicode lookup tool
- UTF-8 test page from fileformat.info: Check for browser rendering
- Unicode info page from fileformat.info
- Unicode regex groups from regular-expressions.info
- Encode/Decode UTF-8 from mothereff/in
Xpath Information
- Xpath Cheat Sheet from lzone.de
- Xpath Cheat Sheet from devhints.io
- SEO’s Guide to Xpath from Builtvisible
- Xpath Functions List
- Xpath Tutorial from Way 2 Tutorial