Best free SEO tools

SEO optimisation tools help webmasters promote websites in the organic search results (SERP) of Google, Yandex, Bing and other search engines.
In our article we reviewed the most popular free SEO tools that will help us:

• spot and analyse the errors on the site and the ways to fix them;
• see the positions of the site in search for a particular key phrase;
• do keyword research and build the semantic core;
• optimise text content;
• analyse the number of links;
• identify traffic sources and other functionality.

As a rule, in 80% of cases they will be enough to promote a website in the SERP properly.

For convenience, all the tools are split into sections

Free SEO tools for analytics

Google Search Console

The most important and popular service by Google. To start promoting your resource in Google search properly, you first need to register your website there.
Google Search Console will let you:

• send Google a request to index the pages of the site;
• add a sitemap.xml;
• see which key queries the site ranks for and in which position;
• analyse the number of impressions and clicks;
• look at the inbound and outbound links of the site;
• see the errors of particular pages of the site;
• remove pages of the site from the index and so on.

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Google Analytics

Google Analytics is the most popular tool that lets you analyse your website by dozens of the most important indicators, from the number of visitors and conversions to demographic data, the user's location and the type of device they came from. Everything you need for quality web analytics you will find in this application.

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Google Data Studio

A powerful data visualisation tool. With it you can create highly informative reports based on data collected from different sources. It is not complicated and it is free for small projects.

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Google Tag Manager

Manage all the tags of your website without editing the code. Google Tag Manager provides simple, reliable and easily integrated solutions for tag management, and completely free of charge.

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Bing Webmaster Tools

This is a free resource that lets you register a website and see its position in the Bing search engine. You can get the maximum information about how your resource performs by using analytics to improve the rankings of the pages shown in the Bing search results.
Bing is the second most popular search engine in the USA.

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Tools for SEO analysis and website audits

Screaming Frog SEO Spider

The most popular desktop crawler among SEO specialists for on-page audits and website analysis. This program will help you find the website errors that hinder its promotion.
You can use it free of charge to crawl up to 500 pages of a website. For bigger projects you will need to buy the program.

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SEO Analyzer

A completely free desktop crawler. An alternative to Screaming Frog SEO Spider.
SEO analysis of a website with SiteAnalyzer is quite simple: this tool lets you crawl URLs and analyse the collected data quickly. Use it to fix technical problems and improve SEO in the shortest possible time.

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NeilPatel SEO Analyzer

Seo-analyzer is a powerful and effective website analysis service. With it you can test a resource for speed and critical errors. This service is conditionally free.

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SEO-auditor

SEO-auditor by Zadroweb lets you analyse the page and domain authority of any link and shows GooglePageSpeed, which is a strong SEO ranking signal. It shows your 10 most popular keywords, checks metadata and images for missing information, shows the social links on your site and performs dozens more functions completely free of charge.

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Free SEO Spider Software

A free alternative to the Screaming Frog SEO Spider crawler. Finding errors, broken links, duplicate information and outdated content.

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Dareboost

A simple and accurate website speed test with a simultaneous analysis of how effectively the web resource works. Test, analyse and optimise your site with minimal effort.

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BROWSEO

This is a popular web app that lets you view any web page without being distracted by styles. It shows the main parameters of the on-page optimisation of a site. There is nothing to download or install, just enter the URL you are interested in into the corresponding field of the app.

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Wappalyzer

An extension that lets you find out which technology a site is built with and which additional services it is connected to.

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WayBack Machine (Web Archive)

It shows the history of a site and the age of a domain. The web archive lets you collect and search collections of digital content without any technical knowledge. Visit Archive-It to create new resources or browse old ones.

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Barracuda Panguin Tool

An online service that shows how Google algorithms affect your website.

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Of course, you can find more free and paid SEO analysis tools, but for most situations the programs and apps listed above are usually more than enough. There are also narrowly specialised resources for specific goals, but they are used fairly rarely.

Tools for collecting and analysing keywords

Google Keyword Planner

This is a keyword planner that helps you build the semantic core for your site. This service is intended for working with Google Ads, but it can also be used to collect the semantics of a site. It will let you find a large number of key phrases that will be relevant for the pages of your site.

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Keyword Surfer

This is a 100% free browser extension that lets you find relevant keywords right in the Google search results. With Keyword Surfer you can do keyword research based on data in just a couple of clicks.

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Keywordshitter

This is a popular service that lets you find Google search suggestions.

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Tools for link analysis

Ahrefs backlink checker

One of the most effective link analysers available today.
Ahrefs is considered the second most popular web crawler after Google. You get access to more than 25 trillion known links, 170 million unique domains and 6.5 billion pages that are crawled every day.

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Domain Analyses

A popular and free domain rating analysis tool by MOZ. Enter any domain and it will show you the best competitive SEO metrics, including domain authority, top pages, ranking keywords and much more.

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Check-my-links

This is an effective link-checking extension that crawls your web page and looks for broken links. This extension will be useful for SEO specialists to prevent the site from accumulating «extra weight».

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Linkminer

Browser SEO extensions for finding and analysing links. It checks web pages for broken links and shows the metrics of those links. Now you can learn more about the links you checked to make smarter decisions faster. Get information and social data for any link on a page. You can also use LinkMiner to find out how many internal or external links there are in total on the page you are viewing.

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Domain Authority Checker

Domain authority check. The domain authority checking tool lets you check the DA score of a website. Just paste the URL of the website you want into the search field and press the «Check authority» button.

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Google Trends

A program unique in its capabilities that lets you learn about the preferences and trends of user queries from all over the world. The words people mention themselves and the most frequent queries can always be seen in this app.

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Multi-tools for SEO

SiteLiner

It will help you find duplicated content, broken links and much more.

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SEO Minion

A must-have extension for SEO specialists!
It will help you with everyday SEO tasks such as on-page SEO analysis, checking broken links, previewing search results and much more.

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SEOquake

A powerful set of SEO tools for your browser that lets you check any web page against a huge selection of SEO parameters «on the fly». SEOquake audits an on-page site in an instant, studies internal and external links and compares domains and URLs in real time, exporting all the data to a report file.

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SEO tools by Internet Marketing Ninjas

Detecting the most common problems and errors, such as broken links and images, empty alt text, missing meta tags and so on.

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Website speed checking tools

Google Page Speed Insight

It lets you analyse and check the loading speed of the pages of your web resource. If there are problems, it suggests the best solutions for speeding up the loading time.

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GT Metrix

It lets you find out how fast your website loads. If there are problems, it points to the possible causes and opens up new optimisation opportunities for you.
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Speed Monitor

A service for daily monitoring of website speed and performance. SpeedMonitor uses Lighthouse data to check the performance of your resource, constantly tracking changes. Get notified by email when the speed of your page drops.

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Web Page Test

In our opinion the best tool for measuring website loading speed. A large number of parameters configurable by browser and location.

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Text analysis services

Text Ru

Analysis of texts for originality, spam level and «wateriness». One of the most popular resources used by copywriters in the Russian-speaking segment of the internet.

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Glavred

Analysis of texts in terms of cleanliness and readability. Detecting «water», repeated content and errors. A fast and solid assessment and analysis of content.

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Turgenev

The service uses several main criteria for assessing content: uniqueness, wateriness, readability and the absence of repeated content.

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Copyscape

It checks copies of pages that are similar to yours and may be duplicates.

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Checking the responsive version of a website

Google Mobile Friendly

A simple test by Google that lets you find out how well your page is optimised for mobile gadgets.

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SERPerator

It will help you test how the site is displayed in mobile search.

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Technical SEO optimisation tools

Rich Results

A service by Google that shows whether schema microdata is implemented on your site. This microdata helps search robots determine the content of a page more accurately.

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Chrome DevTools

A web developer tool built directly into the browser. It lets you view the code of a site page. Press F12 and open the developer tool in your browser.

Technicalseo Hreflang

This tool lets you quickly check that the hreflang tags on a page work correctly.

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Additional free SEO tools

Google My Business

This is the information about your business on Google Maps. With this app you can keep in touch with your clients, look at their reviews, add opening hours, the office address and much more.

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Clarity by Microsoft

An alternative to Yandex Webvisor. It lets you view a heat map of clicks, watch recordings of how a visitor interacted with the pages of your site and much more. An excellent tool for internet marketers.

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Location Guard

This extension «substitutes» the geolocation and lets you see the search results in other countries.

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Google SERP Preview Tool

The search result preview tool helps you visualise how your metadata will appear on the Google search results page (SERP).

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As a conclusion
SEO tools will be useful for search promotion in any search engine. With them it is easier and faster to find and fix errors and to promote websites in the search results more effectively.