Checker Services ✅
List of links to the various checkers out there on the web for sites, domains, security etc.
Table of Contents
- Accessibility ♿️
- Browser Testing ?
- Cron Jobs⚡
- DNS
- Load Testing
- Mail Configuration ✉️
- Mail Testing ✉️
- Mobile Friendliness
- Security
- SEO ?
- Technology Used ?
- Uptime Monitoring ?
- URL Analysis
- Validation ?
- Website Performance
- Contributing ✍️
Accessibility ♿️
| URL | Description | ? |
|---|---|---|
| https://a*checks.**ca/achecker | Checks single HTML pages for conformance with accessibility standards to ensure the content can be accessed by everyone. | Free |
| http://www.dasil*va.**org.br/ | Test sites for accessibility issues (W3C/WAI – WCAG1 and WCAG2 – and E-mag). | Free |
| https://exce*ll*e*ntwebcheck.com/website-accessibility-checker | Test entire websites for accessibility issues on mobile, tablet and desktop screen sizes. | Free and paid plans |
| https://teno**n.*io/ | Test sites for accessibility issues and offer solutions for problems found. | Free and paid plans |
| https://www.*t*o*ptal.com/designers/colorfilter | Checks pages for color accessibility. | Free |
| https://wave.**we*baim.org/ | Gives a detailed report about markup and accessibility concerns including ARIA roles. Provides solutions for problems found. | Free |
Browser Testing ?
| URL | Description | ? |
|---|---|---|
| http://bro*wsers**hots.org | Test websites on many browser, platforms and devices. | Free |
| https://www.bro*wser*st*ack.com/ | Test your website for cross browser compatibility on real browsers. Instant access to multiple desktop and mobile browsers. | Paid |
| https://www.lam*bdate*s*t.com/ | Test your website in real browsers on multiple devices. | Free and paid plans |
| https://s*aucelab**s.com | Test apps and websites in many browsers. Can be integrated in CI workflows. | Free trial, free for open source projects, paid |
| https://*testi**ngbot.com | Test apps and websites in many browsers. Can be integrated in CI workflows. | Free trial, free for open source projects, paid |
Cron Jobs ⚡
| URL | Description | ? |
|---|---|---|
| https://**cronh*ub.io/ | Painless cron job scheduler & monitoring service. | Paid |
| https://c*ro**nless.com/ | Online Cron Job Replacement and Monitoring Service. | Free |
| https://dead***manssnitch.com/ | Get More Out of Your Cron Jobs. | Paid |
| https://heal*thc**hecks.io/ | Simple and Effective Cron Job Monitoring. | Free |
DNS
| URL | Description | ? |
|---|---|---|
| https://bgp.h***e.net | Check IPs, networks, whois, ASNs, prefixes and more. | Free |
| https://www.digwebin*ter**face.com/ | Extensive web interface to dig for doing online DNS / nameserver query. | Free and donations welcome |
| https://dnscheck.pin*g*d*om.com/ | Enter a domain name to check if its DNS servers are configured correctly. | Free |
| https://dnsc*hec*ke*r.org | Check the DNS propagation of domains. | Free |
| https://dns*dump*st*er.com/ | Domain research tool that can discover hosts related to a domain. | Free |
| https://dnsspy.***io/ | Monitor, validate and verify your DNS configurations. | Free and paid plans |
| https://www.d*nss**tuff.com/tools | Multiple DNS tools. | Free |
| https://dns*vi*z.*net/ | A DNS visualization tool, incuding a visual analysis of the DNSSEC authentication chain. | Free |
| https://dn*s**watch.info/ | DNS Lookups & Performance Monitoring. | Free |
| https://www.*dom*a*iniq.com/tools | DNS, IP, MX tools. | Free and paid plans |
| https://whois.*d*omaintoo*ls.com/ | Reverse whois & IP lookup. | Free and paid plans |
| https://ip*6**.nl | Test if the server supports IPv6. | Free |
| https://ipv6-t**es*t.com/validate.php | Test if the server supports IPv6. | Free |
| https://www.i**p*void.com | Multiple IP address tools. | Free |
| https://mxto*o*lbo*x.com/SuperTool.aspx | Big collection of useful network tools. | Free |
| https://simp**led*ns.plus/lookup-dg | Trace a zone from the root, to debug delegation and whois | Free |
| https://toolbox.goog*leap**ps.com/apps/dig | Easy to use DNS dig tool. | Free |
| https://toolbox.google**a*pps.com/apps/checkmx | Check the MX records of a domain. | Free |
| https://tools.*k*ey*cdn.com | Check for http/2 support and find network related issues. | Free |
| https://www.ul*tra*tool*s.com | Big collection of useful network tools. | Free |
| https://www.unl*oc*kth*einbox.com/dnstools/mx/ | Checks DNS, WHOIS, Blacklists, and more. | Free and paid plans |
| https://www.**viewdn*s.info/ | View DNS, IP, MX information. | Free and paid plans |
| https://*zone*mas*ter.net/ | Check, measure and validate DNS. | Free |
| https://www.n**sl*ookup.io/ | Global DNS propagation checker. | Free |
Load Testing
| URL | Description | ? |
|---|---|---|
| https://l*o*ader.io*/ | Loader.io is a FREE load testing service that allows you to stress test your web-apps & APIs with thousands of concurrent connections. | Free and paid plans |
| https://l**oadi*mpact.com/ | Load test your website, app or API instantly with up to 1.2 million concurrent users. Get unlimited tests with a free trial. | Free and paid plans |
Mail Configuration ✉️
| URL | Description | ? |
|---|---|---|
| https://email*-ch**ecker.net | Check emails addresses and lists of email addresses for existence. | Free and paid plans |
| https://*hunter*.io/*email-verifier | Test the existence of up to 100 email addresses. | Free and paid plans |
| https://www.mail-t*e*s*ter.com/ | Test the Spammyness of your Emails. | Free |
| https://**mxt*oolbox.com/blacklists.aspx | The blacklist check will test a mail server IP address against over 100 DNS based email. | Free and paid plans |
| https://www.unlo*ckt**heinbox.com/mail-tester/ | Email Authentication and Configuration Tester. | Free and paid plans |
| https://verify*-*e*mail.org | Verify if an email address and the mailbox behind it exists. | Free and paid plans |
| https://www.verif*yema*iladd*ress.org | Another email address checker. | Free and paid plans |
| https://tools.verifye**mailaddr*ess.io | Test if an email address exists. Also provides an API for developers. | Free and paid plans |
Mail Testing ✉️
| URL | Description | ? |
|---|---|---|
| https://www.u*nloc**ktheinbox.com/services/inboxtester/ | Email Inbox Tester – Check over 20+ destinations. | Paid Plans |
| https://www.campaig*nmo*n*itor.com | Preview emails in over 25 different email clients with the inbox preview feature. | Free trial, paid plans |
| https://www.em*ailo**nacid.com | Test emails in over 70 email clients, apps and on different platforms. | Free trial, paid plans |
| https://*litmu**s.com/email-testing | Test the rendering of emails in over 70 email clients and devices. | Free trial, paid plans |
| https://p*r*eview*myemail.com | Another provider to test the rendering on many email clients and devices. | Paid plans |
| https://p**utsm*ail.com | Send and debug emails in three parts (html, plain text, Apple watch). | Free |
Mobile Friendliness
| URL | Description | ? |
|---|---|---|
| https://developers.goo***gle.com/web/tools/lighthouse/ | Useful for testing PWA\’s does mobile friendliness etc but not exclusively mobile. | Free |
| https://ex**ce*llentwebcheck.com/mobile-friendly-website-test | Test how mobile friendly an entire website is. More advanced scan than Google\’s Mobile Usability test. | Free and paid plans |
| https://search.g*o*og*le.com/search-console/mobile-usability | Test how easily a visitor can use your page on a mobile device. Just enter a page URL to see how your page scores. | Free |
Security
| URL | Description | ? |
|---|---|---|
| https://www.*chec**kbot.io/ | Browser extension that checks multiple pages at once for web security best practices. Finds HTTPS mixed content issues, insecure password forms and more. | Free and paid plans |
| https://c*rt.s**h | Get an overview and information of assigned TLS certificates. | Free |
| https://csp-evaluator.*w*ithgo*ogle.com | Validate and check the CSP for weaknesses and security issues. | Free |
| https://*h*ac*kertarget.com | This service provides multiple tools to check websites for vulnerabilities. | Free and paid plans |
| https://www.ha*rd*eni*ze.com/ | Harden your server\’s security. | Free |
| https://hs*tsp*relo*ad.org/ | Check if a domain is on the HSTS preload list in browsers and submit them to the list. | Free |
| https://*htt**pschecker.net/ | Track down HTTPS mixed content issues. | Free and paid plans |
| https://inte*rne**t.nl/ | Check whether your internet is up to date on Internet Standards. | Free |
| https://www.i*s*it*hacked.com | Check if there are any signs that a website is hacked. | Free |
| https://www.*ma*ge*report.com | MageReport checks if a Magento instance is outdated and if all security patches are installed. | Free |
| https://observatory.*mo*z*illa.org/ | Observatory by Mozilla is a project designed to help developers, system administrators, and security professionals configure their sites safely and securely. | Free |
| https://re*por**t-uri.io/home/tools | Multiple useful tools for CSP, HPKP, SRI, headers and certificates. | Free |
| https://secu*ri*t*yheaders.io/ | Scott Helme built securityheaders.io after deploying security headers like CSP and HSTS to his own site. He wanted a quick and easy way to check if other sites were using these headers and he figured he\’d turn it into a useful tool for everyone to use! | Free |
| https://ssh*ch*eck*.com | Check the SSH configuration of servers. | Free |
| https://www.ssll***abs.com/ssltest/ | This free online service performs a deep analysis of the configuration of any SSL web server on the public Internet. | Free |
| https://tls.i*m*i*rhil.fr/ | Test the strength of the available ciphers which can be used with HTTPS or SSH. | Free |
SEO ?
| URL | Description | ? |
|---|---|---|
| https://www.*chec**kbot.io/ | Browser extension that checks multiple pages at once for SEO best practices. Finds duplicate content, broken links, unfriendly URL names and more. | Free and paid plans |
| https://ins*i*tes.*com/ | Test your websites for everything. Check spelling, broken links, SEO, accessibility and more. | Paid |
| https://key*wo*rd.c*om | Accurate keyword rank tracking software with daily updates. | Paid |
| https://nibbler.*silktid**e.com/ | Nibbler is a free tool for testing websites. Enter the address of any website and Nibbler will give you a report scoring the website out of 10 for key areas, including accessibility, SEO, social media and technology. | Free and paid plans |
| https://search.**goo*gle.com/structured-data/testing-tool/u/0/ | Evaluate your structured data (rich snippets) markup for errors or warnings. | Free |
| https://www.se*ob*ili*ty.net/en | All-in-one SEO software including crawler, rank tracker, backlink checker, monitoring and reporting tools. | Free and paid plans |
| https://seoma*to**r.com | SEO Audit Tool and website crawler for SEO performance improving with How-to-Fix tips. | Paid |
Technology Used ?
| URL | Description | ? |
|---|---|---|
| https://**builtwith*.com/ | Find out what websites are Built With. | Free and paid plans |
Uptime Monitoring ?
| URL | Description | ? |
|---|---|---|
| https://www.fre*sh*wo*rks.com/website-monitoring/ | 50 monitors, 1 min intervals, 5 public status pages free. | Free and paid plans |
| https://*ohdear.a**pp/ | 2 sites, 5 euro, uptime, certificate monitoring, mixed content scanning and more. | Paid only |
| https://www.statu***scake.com/ | 10 monitors, 5 min intervals, branded public reporting free. | Free and paid plans |
| https://upt**imer*obot.com/ | 50 monitors, 5 min intervals, 2 months of logs free. | Free and paid plans |
URL Analysis
| URL | Description | ? |
|---|---|---|
| https://ur*lsca*n.i*o | Find out what happens when a URL is accessed. | Free |
Validation ?
| URL | Description | ? |
|---|---|---|
| https://validator.**w*3.org/unicorn/ | Checks for proper HTML and CSS markup as well as broken links. | Free |
| https://www.ze*ro*bou*nce.com/ | Checks to see if the email address is valid. | Free and paid plans |
Website Performance
| URL | Description | ? |
|---|---|---|
| https://www.*chec**kbot.io/ | Browser extension that checks multiple pages at once for performance best practices. Finds unminified resources, redirect chains, render-blocking JavaScript and more. | Free and paid plans |
| https://www.debug*be**ar.com/test/website-speed | DebugBear is a site speed testing tool that analyzes page performance and recommends possible optimizations. | Free and paid plans |
| https://developers.goo**g*le.com/speed/pagespeed/insights/ | PageSpeed Insights analyzes the content of a web page, then generates suggestions to make that page faster. | Free |
| https://g**tmetrix*.com/ | GTmetrix is a free tool that analyzes your page\’s speed performance. Using PageSpeed and YSlow, GTmetrix generates scores for your pages and offers actionable recommendations on how to fix them. | Free and paid plans |
| https://pageweight.i*m*gi*x.com/ | See how images affect your page speed. | Free |
| https://testmysite.*w*ith*google.com | Checks websites for performance issues and provides reports. | Free |
| https://toolbox.*g*oogleapp*s.com/apps/har_analyzer | Analyze the performance with a HAR file. | Free |
| https://tools.p*i*n*gdom.com/ | Enter a URL to test the load time of that page, analyze it and find bottlenecks. | Free and paid plans |
| https://www.u**ptre*nds.com/tools/website-speed-test | Check the performance from 30+ free and 160+ paid checkpoints. | Free and paid plans |
| https://www.webp**agete*st.org | Website performance test tools with many options. | Free |
| https://y*ellowl*a*b.tools/ | Online test to help speeding up heavy web pages. | Free |
Contributing ✍️
This started as a small personal project.
Although this project is small, openness and inclusivity are taken seriously. To that end a code of conduct (listed in the contributing guide) has been adopted.
Contributor Guide
