An online SEO checking site, Seobility is one of the best software out there. It is a free software without any trial period. The software is capable of carrying out

• Automated website crawling to all website links, external and internal
• It is capable of detecting errors, not only in content but also in the structure of the website
• The software monitors the webpage 24/7 and keeps the user informed via e-mail

The paid versions are either monthly plan or annually. The annual plan comes with a 20% discount.

SEOptimer is a tool which can check your website in order to find any problems which might be flagged by a search engine as a penalty charge.

The software comes with a 14-day trial version which can be used to carry out checks on

• Title and meta headers
• Keyword consistency
• Backlinks
• Mobile and tablet rendering

The software is customisable to look as the user desires and is capable of producing a professional yet simple worded PDF report in nine different languages.

Two paid versions are available at $29 per month and $59 per month. Both come with extra features.

Siteliner is an SEO checking software but there is one thing different about it. it is online. No need to waste any disk space or processing power on it.

It is created by the same people who created the plagiarism check site, Copyscape.

The free site is able to provide

• Duplicate content check
• Check on damaged or broken links
• Creates detailed sitemaps and reports

The free version is able to carry out analysis on sites with 250 pages. The paid version is adept at carrying out analysis on websites with up to 25,000 pages with no limitations on the number of analysis run.

ContentKing is an SEO tool which is capable of providing real-time auditing information and content tracking to the user. There is no installation required as the entire process is carried out online.

The 14-day trial version can be set up in 20 seconds to a minutes time and can provide

• SEO Auditing
• SEO monitoring
• SEO alerting
• SEO change tracking
• Insights and reporting

The pricing of the subscription is based on some pages on your website which starts at $11.26 per month for 100 pages.

Companies like BT, Kentico, and Mitsubishi are a few of the companies who utilize this software.

Spotibo was created with the idea of showing everyone that on-page SEO is simple. The tool requires no installation as the entire functioning is carried out online.

There are many benefits to this tool, such as:

• Quick and easy SEO analysis
• Handling complex websites without your PC freezing

The tool is adept enough to carry out checks like:

• Continuously monitoring on-page SEO
• Alerting the user of any problems that occur
• Preserving the history of the problems that occur

The paid versions are available in the lite, standard and advanced versions. The statistics indicate that Spotibo is able to crawl through 500 web pages simultaneously.

SEO crawler by Rob Hammond is a great SEO tool created for quick and easy use. SEO crawler by Rob Hammond is a cloud-based tool making it easier to get started instantly.

This makes SEO crawler easily accessible from any place around the world.

The tool is capable of providing real-time & regular reports on the following:

• URL check and optimization
• Page title check
• Metadata details
• Meta keywords

Moreover, SEO crawler is not limited to desktop or web layout. It is also able to run on smoothly handheld devices like mobiles and tablets. SEO crawlers could crawl over 300 pages at a time.

SEO tester online is an online software which can be used by anyone for a thorough check and report on the user’s website. The software will run tests and checks to find out any SEO errors and solve them for the user.

The best part about the software is that the entire task is carried out with the power of cloud computing. Thus, it reduces the need for a dedicated machine to perform the operations.

The following tasks can be carried out by the software:

• Deep SEO analysis of a webpage
• Using 50 exams to find optimization issues
• Optimizing HTML
• Improving speed and performance

Varvy is one of the best SEO tools in the market. It is an online tool and thus, requires no installation on your desktop.

Varvy works with the Google guidelines and a set of rules followed by websites to have a better ranking.

Varvy also assists the user in finding issues in the SEO and suggest how to fix them.

Some of its main features include:

• It is completely free
• Carries out SEO audits and reports all the issues
• Availability of a bunch of articles on SEO, written by the creator Patrick Sexton

Dareboost is an analysis software, targeted to find out the performance capability of a webpage. No software installation is required as the entire tool is set up online.

You can sign up for free and immediately start running website performance tests.

The main features if the tool involve:

• Video replay analysis
• UX analysis
• 100 plus quality checks
• Optimization guidelines
• PDF export and shareable reports

There are three standard payment plans available: freelance, business and enterprise. However, you are also allowed to create a custom plan as per your convenience.

Nibbler is a free online tool, designed to help users run performance tests on their created websites. The performance test will include checking for accessibility, SEO and social media.

The tool will rate the targeted website out of 10 in the following areas:

• Accessibility – The ease of use for challenged users as well as normal users
• Experience – Navigability and user experience
• Marketing – The ranking of the website or link in the market
• Technology – The technology and tools being used
• Overall performance – Response time and content quality

The free version has a page limit of 5 webpages, whereas the Pro version can run 100+ web pages and the subscription costs $50 per month.

Website grader, as the name suggests, is an online software which grades your website based on numerous parameters. I

t runs a performance check on a website to analyse multiple factors which affect the user experience and search engine results. The tool is powered by Hubspot and is able to provide the following information:

• Performance analysis
• Complete end to end SEO Analysis
• Security
• Page requests
• Page speed
• Page redirects

Everything has a system on the basis of which ratings are given. Performance, SEO and technology are rated out of 30, whereas security is rated out of 10.