Checkbot 0.3.1 CRX for Chrome or Chromium

Free Developer Tools Extension

Published & copyrighted by

Editors' Words: Check 1000s of pages for 50+ SEO/speed/security issues: broken links, duplicate titles, redirect chains, invalid HTML/JS/CSS & more. Checkbot can spider 1,000s of pages in minutes to uncover broken links, duplicate content issues, ... Read More > or Install Now >

Checkbot App / Specifications

Download CRX


1.5 MB

Chrome Store

Tech Specs

  • • Type: Browser Extension
  • • Version: 0.3.1
  • • Price: Freeware
  • • Offline: No
  • • File name: checkbot.crx

User Reviews

  • aggregateRating
  • • Rating average
  • 4.9 out of 5
  • • Rating users
  • 117

Download Count

  • • Total downloads
  • 12
  • • Current version downloads
  • 7
  • • Updated: March 17, 2018
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Checkbot / Screenshots

Checkbot / Description

Checkbot can spider 1,000s of pages in minutes to uncover broken links, duplicate content issues, invalid HTML/CSS/JavaScript, insecure password forms, performance killing redirect chains, mixed content and more. Read on for the list of 50+ best practices Checkbot tests for which are gathered from Google, Mozilla, W3C, OWASP and other web experts.


Checkbot is free with all features only for the duration of the beta test period. Later there will be a paid plan and a more limited free version.


Checkbot can verify you're following the 50+ best practices for SEO, speed and security detailed in the Checkbot Web Guide found at

πŸ“ŠCheckbot tests for these SEO best practices (see

βœ“ Use unique titles
βœ“ Use optimal length titles
βœ“ Set page descriptions
βœ“ Use unique descriptions
βœ“ Use optimal length descriptions
βœ“ Avoid thin content pages
βœ“ Avoid duplicate pages
βœ“ Set image ALT text
βœ“ Set mobile scaling
βœ“ Avoid plugins
βœ“ Use short URLs
βœ“ Avoid underscores in URLs
βœ“ Avoid URL extensions
βœ“ Avoid URL parameters
βœ“ Avoid symbols in URLs
βœ“ Use lowercase URLs
βœ“ Avoid deeply nested URLs
βœ“ Use valid HTML
βœ“ Use valid CSS
βœ“ Use valid JavaScript
βœ“ Return 404 for broken links
βœ“ Avoid broken internal links
βœ“ Avoid broken external links
βœ“ Avoid broken page resources
βœ“ Use robots.txt files
βœ“ Specify sitemap locations
βœ“ Avoid temporary redirects
βœ“ Avoid meta redirects

πŸš€ Checkbot tests for these web speed best practices (see

βœ“ Use compression
βœ“ Avoid recompressing data
βœ“ Minify files
βœ“ Avoid inline source maps
βœ“ Enable caching
βœ“ Use long caching times
βœ“ Avoid duplicate resources
βœ“ Avoid inline CSS
βœ“ Avoid CSS @import
βœ“ Defer JavaScript loading
βœ“ Avoid inline JavaScript
βœ“ Avoid internal link redirects
βœ“ Avoid resource redirects
βœ“ Avoid redirect chains

πŸ”’ Checkbot tests for these web security best practices (see

βœ“ Use HTTPS
βœ“ Avoid mixed content
βœ“ Send passwords securely
βœ“ Use HSTS
βœ“ Use HSTS preload
βœ“ Disable content sniffing
βœ“ Specify MIME types
βœ“ Restrict iframe usage
βœ“ Use XSS protection
βœ“ Hide server version data

Test your site with Checkbot today and learn what improvements you can make to boost your SEO, speed and security.

β˜… BENEFITS β˜…

Checkbot will become an essential part of your workflow for identifying problems early and guiding optimisations:

BOOST YOUR SEO, SPEED AND SECURITY - Checkbot will guide you on how to craft a highly optimized website: improve your search rank, accelerate your pages and harden your security to make the most out of your site.

SAVE TIME ON MANUAL TESTING - Don't waste time on tedious manual checks: Checkbot can effortlessly and reliably check thousands of pages for you in minutes.

STOP PROBLEMS BEFORE THEY GO LIVE - Don't wait for critical issues to impact your users or search rank: test your development and staging sites with Checkbot to catch problems before they make it to production.

UNCOVER HARD TO SPOT PROBLEMS - Discover critical issues lurking in places you didn't think to check: Checkbot's crawling ability and comprehensive set of tests will root out problems you've missed.

CHECK ALL THE SITES YOU WORK ON - Checkbot lets you crawl all the sites you want as often as you want: check every site you're involved with after every change to keep on top of issues.

GET IMMEDIATE FEEDBACK - Don't wait days for your search results or Google Search Console to update to see what your changes did: test your site with Checkbot for instant feedback.

β˜… FEATURES β˜…

Checkbot gives you all the tools you need to track down, understand and fix website issues:

QUICK & EASY TO INSTALL - Add Checkbot to Chrome in seconds with only two clicks: use Checkbot anywhere you run Chrome alongside your favourite Chrome web development tools.

INVESTIGATE ISSUES - Track down problems with ease: use convenient shortcuts to view page source code, show URL response headers, list inlinks to a URL and examine redirect chains.

EXPLORE YOUR SITE - Browse all URLs found during a crawl: show your most linked to pages, list all image/JS/CSS files, review non-indexable pages, explore all redirects and more.

CHECK PRIVATE & LOCAL SITES - Easily check your site in all stages of development: crawl staging and local development sites, password protected pages and sites on private networks.

CUSTOMISE CRAWLS - Focus your testing on the parts of your site you're currently interested in: limit the URLs crawled by subdomain, subfolder, search depth, pattern and type.

EXPORT TO CSV - Export lists of URLs with problems to CSV format: share the data with team members, compile custom reports and perform your own further analysis.

GET QUICK FEEDBACK - Think you've fixed a page that had an issue? Quickly verify your fix by recrawling only that page for fast feedback without having to crawl the entire site again.

IN-APP GUIDANCE - Not an expert? No problem: Checkbot tracks down web site issues for you, explains why you need to fix them and confirms your fixes worked.

Visit for answers to frequently asked questions about Checkbot.

β˜… CONTACT β˜…

Any comments, feedback or bugs to report? Let us know by messaging [email protected]

β˜… SOCIAL β˜…

Follow us for updates and to give feedback:


Finding Checkbot useful? Help support further development by rating Checkbot on the Chrome Web Store and follow us for the latest updates. πŸ˜„

Version 0.3.0 (14 March 2018)

- New: Bulk export: You can now export all reports in one click via a sidebar button. This generates a ZIP file containing a CSV file for each report.

- New: Pages that have a meta refresh URL are now viewed as redirects instead of pages. This is more in line with how they'd be treated by humans and search bots. This reduces false positives in several SEO reports and improves reports that take redirects into account.

- New: Added a new "Broken URLs" report to the "Explore" category. This combines the URLs from the 4xx, 5xx and connection error reports. A shortcut to this report has been added to the summary screen so you can quickly view all your broken URLs in one place.

- New: Redirect chains that are too long are now flagged as URLs that fail to load.

- New: The CSS validator now understand CSS variables, CSS grid and several more vendor specific selectors.

- New: If there's a problem getting the start page of a new crawl, you can now submit a filled out report to get help.

See for more.


The "Read and change all your data..." permission asked for by Chrome is required to allow Checkbot to fetch and test URLs encountered during crawls which could be from any domain. This permission is used only for crawling sites and testing URLs.


By installing this extension, you agree to our Terms of Service ( and Privacy Policy (

Download Checkbot CRX for Chrome

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