Does your site follow web best practices?
Checkbot will let you know.

Checkbot can test 1,000s of pages in minutes for broken links, duplicate content, invalid HTML, insecure forms and more.
Check your site is following the 50+ best practices we've gathered from Google, Mozilla, W3C and other web experts:

SEO guidelines

  • Fix all broken links
  • Use unique page titles
  • Eliminate duplicate pages
  • Use valid HTML, CSS & JS
  • Avoid temporary redirects
  • Use human readable URLs
See all guidelines

speed guidelines

  • Eliminate redirects chains
  • Avoid inline CSS & JS
  • Minify CSS & JavaScript
  • Leverage browser caching
  • Enable server compression
  • Avoid render blocking scripts
See all guidelines

security guidelines

  • Use HTTPS on all pages
  • Avoid mixed content errors
  • Secure password forms
  • Enable HSTS preload
  • Use XSS protection
  • Disable type sniffing
See all guidelines

Don't know anything about optimising websites? Checkbot will let you know what fixes to make and why they're important.
Browse the Checkbot Web Developer Guide to read all the best practices Checkbot can automatically help you with.

For Windows, Mac, Chrome OS and Linux

Checkbot is a Google Chrome extension that runs on all major desktop platforms.
Install Checkbot right now and start optimizing your website today.

Install now for Chrome
On mobile? Tap the button to add Checkbot to your
Chrome desktop or to send an email reminder for later

What people are saying about Checkbot

Over 10,000 Chrome users are using Checkbot to get the most out of their websites.
Checkbot has a 4.9 out of 5 stars average review on the Chrome Web Store. Here's a sample of recent reviews:

Really slick, took me less than an hour to compile a list of things we had overlooked in our rush to launch. As a product manager, I really appreciate it.

Hardi KΓ΅vamees
Rating: 5 out of 5 β˜…β˜…β˜…β˜…β˜…

Super tool, I’ve found many different errors and suggestions how to improve my website. High-five for csv export! Very easy and understandable UX.

Stjepan Treger
Rating: 5 out of 5 β˜…β˜…β˜…β˜…β˜…

My new go-to tool for quick website performance assessment! Very intuitive, no useless feature. Definitely recommend!

Baptiste Saugeron
Rating: 5 out of 5 β˜…β˜…β˜…β˜…β˜…

Helped me a lot in improving my website. Has a detailed dashboard, and loads of features to help developers out.

Raghav Khandelwal
Rating: 5 out of 5 β˜…β˜…β˜…β˜…β˜…

Really fast and helpful reports! This is really helping to clean up my website.

Ben Lewis
Rating: 5 out of 5 β˜…β˜…β˜…β˜…β˜…

Shows you how to fix stuff, which is good for a junior developer like me to learn something new.

Liniovas Dovydas
Rating: 5 out of 5 β˜…β˜…β˜…β˜…β˜…

Let’s you review all is set up correctly and working. And you can discover new things if you are a bit outdated.

Enric Bisbe Gil
Rating: 5 out of 5 β˜…β˜…β˜…β˜…β˜…

Does what it says on the tin and does it in a clean and fast manner.

Jay Hirst
Rating: 5 out of 5 β˜…β˜…β˜…β˜…β˜…

See more reviews on the Chrome Web Store page.


Checkbot will become an essential part of your workflow for identifying problems early and guiding optimisations.
Use Checkbot to crawl your site for problems and confirm fixes whenever you make changes.

Boost your SEO, speed & 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.

Browse our Frequently Asked Questions for answers to common questions about Checkbot.


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 website issues for you, explains why you need to fix them and confirms your fixes worked.

Keep up with new features and improvements by checking our releases page.


Checkbot is currently free during its public beta period. There will be free and paid plans after the beta is over.
The feature list below is subject to change depending on what feedback is generated from the beta test.


  • URL limits (to be announced)
  • Unlimited sites
  • Unlimited recrawls
  • Contains ads
  • Install now for Chrome
  • Pro

    Free while in beta
    • 10K URLs per crawl*
    • Unlimited sites
    • Unlimited recrawls
    • Ad free
    • Crawl local sites
    • CSV export
    • Crawl pages with passwords
    • Skip URLs by pattern & type
    • Customise User-Agent
    • Install now for Chrome

    * One URL counts as any URL requested during a crawl including external links, images and redirects.

    Start improving your website today with Checkbot

    What changes can you make to get your site to rank higher, go faster
    and be more secure? Get Checkbot now and find out.

    Install now for Chrome
    On mobile? Tap the button to add Checkbot to your
    Chrome desktop or to send an email reminder for later