Best Free SEO Software

CSS HTML Validator for Windows, Mac, and Linux is a fast, powerful, highly user configurable, and easy to use web development tool that checks HTML, CSS, SEO, spelling, accessibility (including WCAG 2.0/2.1/2.2), PHP, XHTML, JavaScript, htmx, and links. CSS HTML Validator includes batch processing (in the Pro edition), integrated HTML/CSS editing, and much more. It works offline so it's super-fast and your privacy is protected because your documents are not uploaded to a server for checking. CSS HTML Validator Pro has superior customization features so you can configure the validation to your liking. You can even add your own validator messages, recognize your own HTML elements and attributes, and much more. Try CSS HTML Validator Pro for Windows free for 200 validations or 30 days, whichever comes first. A FREE limited version of htmlval for Mac and Linux is also available.

The Screaming Frog SEO Spider is a website crawler that helps you improve onsite SEO, by extracting data & auditing for common SEO issues. Download & crawl 500 URLs for free, or buy a license to remove the limit & access advanced features. The SEO Spider is a powerful and flexible site crawler, able to crawl both small and very large websites efficiently while allowing you to analyze the results in real-time. It gathers key onsite data to allow SEOs to make informed decisions. Crawl a website instantly and find broken links (404s) and server errors. Bulk export the errors and source URLs to fix, or send to a developer. Find temporary and permanent redirects, identify redirect chains and loops, or upload a list of URLs to audit in a site migration. Analyze page titles and meta descriptions during a crawl and identify those that are too long, short, missing, or duplicated across your site.

Plerdy - Multifunctional SaaS solution for an improvement of conversion on websites. - Heatmaps - we see exactly where the clicks were on the website. All clicks on the website are recorded and displayed in real time. Which helps to understand how users behave on the website. - Popup smart forms - you can quickly create and show on the website different pop-up forms without developers and designer. Examples: The pop-up form for collecting leads from the website. Offer to the users when they abandon their shopping cart. - SEO-alerts - tool that continuously analyzes your website SEO factors to provide regular notifications on changes. Checks keywords, titles, tags and attributes to define what can be optimized. Provides both aggregated and on-page statistics to evaluate your web resource.

Our website crawler captures a website’s code and performs site audits in real-time so you can analyze the results quickly. Our Technical SEO Spider software is a great fit for SEO agencies, web developers and businesses. When you subscribe to our SEO software you will discover a better way of auditing and analyzing performance metrics of your website. With a quick, easy to use interface that can be used on any device anywhere you are. Our software is designed for SEO agencies, web developers and businesses who want to improve their rankings and website performance. Our advanced website crawler captures every element of a website's code in real-time and then highlights issues and errors within the code. Problematic code can range from poor optimization, coding and validation errors, PageSpeed Insights errors and other unknown factors. Once the highlighted issues are identified then our software helps you correct these issues through our coding tools, coding generators and AI-tools.

Acquiring that new backlink is often a numbers game — you need link building tools that will provide tons of link suggestions that will serve as a foundation for your link building campaigns. And LinkAssistant is simply the best tool for sheer volume. With 7.1 billion pages crawled on a daily basis, the software will give you backlink opportunities in hundreds and even thousands. Link building isn't just about the number of backlink prospects presented. What you really need is the list suited to your particular link building strategy. Maybe all you need is guest post tracking, and your link building tools give you 500 directories and forums. This is where our software can be of great help. Depending on your link building strategy, you can choose your research method from 10 most effective link prospecting mechanisms. From guest posting opportunities to active giveaways, with the chosen search method you'll get link suggestions that are best suited to your needs right now.

InstaRank SEO is a free, professional-grade SEO audit platform built for marketers, agencies, and business owners. Run 100+ in-depth checks across Technical SEO, On-Page SEO, Off-Page signals, E-E-A-T, content quality, page speed, backlinks, keywords, and AI search visibility — all without signing up. What makes InstaRank different is its LLM Optimization Checker — the first free tool that scores how well your website is optimised for ChatGPT, Perplexity, Google Gemini, and Google AI Overviews. The platform also offers an API, white-label reporting for agencies, and a free WordPress plugin.

Free version of Keyworda generates 1000+ long-tail keyword suggestions for every search term. Keyworda targets keywords from global and local search engines, social networks and e-commerce platforms. Unlike Google Keyword Planner or other keyword research tools, Keyworda is extremely reliable as it works 99.99% of the time. You can use Keyworda absolutely for free, even without creating an account. Keyworda helps you discover thousands of new long-tail keywords related to any topic by automatically generating keywords from your target platform search suggestions. The keyword suggestions will be produced based on the platform domain and language that you choose. Are you a business owner, online marketer, or content creator? If so, most likely you would like more people to visit your website, read your content and buy your products or services. The easiest way to achieve it is to find out what your potential customers or readers are searching for on Google and create content.

Rank Tracker is a powerful rank checking platform that allows users to research keyword ideas, analyze SERP competition, and set up unlimited rank tracking and reporting. Rank Tracker is the only local rank tracking software that accurately checks positions for the exact location of your choice: country, state, city, or even an exact street address. Like everything else in this keyword position tracker, these locations are — you guessed it — unlimited. With the tool's 400+ localized search engines, you'll get the most accurate keyword rank checking you ever need.

ETTVI is a cloud-based free SEO SaaS platform built to help digital marketers with actionable results and supercharge their marketing efforts. With access to 100+ tools, ETTVI is your go-to platform to analyze, research, and craft successful online marketing strategies. Based on Search Engine’s Latest Algorithm updates, ETTVI’s SEO tools fulfill the true needs of every Digital Marketer. The freemium version of EETVI doesn’t need any billing or signups. SEO Tools of ETTVI fall into different categories like On-Page SEO Tools, Off-Page SEO Tools, Content Marketing Tools, Technical SEO Tools, Website Maintenance Tools, Tools for Website Management and the Tools for Domains. All of them are market competitive and already satisfying customers from the user's perspective. From auditing the site to conducting a comprehensive research process, we’re striving to develop highly functional and efficient SEO tools for your substantial growth.