Best SEO Software for Linux of 2025

CSS HTML Validator for Windows, Mac, and Linux is a fast, powerful, highly user configurable, and easy to use professional web development tool that checks HTML/HTML5, CSS, accessibility, SEO, PHP, XHTML, JavaScript, links, htmx, and more. CSS HTML Validator will give you valuable and customizable advice while alerting you to obsolete, deprecated, and proprietary tags, attributes, and CSS. Make sure that your website visitors do not leave your site because they run into broken links or other problems caused by poorly written HTML and CSS. The latest version of CSS HTML Validator includes updated HTML & CSS support, improved accessibility checking, support for htmx, new editor color schemes, and other updates and improvements. A Batch Wizard in the Pro edition lets you easily validate entire websites and multiple HTML documents by generating a single validation report in HTML format. 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.

iPlasmaCMS2 a website content management system that is proprietary, is suitable for all levels of website administrators, from novice to expert. The modular system, which was developed using modern web technologies, allows for the management of any type website, web-based app, or intranet. Its scaleability allows you to deploy a single website or a complex network of interconnected websites. iPlasmaCMS2 is the ideal solution for all types of organizations, including non-profit and business organizations as well as government and educational institutions.

Plerdy – Multifunctional SaaS solution to improve conversions on websites. Heatmaps - We can see exactly where clicks took place on the website. All clicks are recorded and displayed in real-time. This allows you to see how users interact with the website. Popup smart forms - Create and display pop-up forms quickly on your website without the need for a designer or developer. Example: The popup form to collect leads from the website. Offer to users when they abandon shopping cart. - SEO-alerts: This tool continuously analyzes your website's SEO factors and sends you regular notifications about any changes. To determine what can be optimized, it checks keywords, titles and tags. This provides aggregated and on-page statistics that can be used to evaluate your web resource.

The Screaming Frog SEO Spider serves as an effective website crawler designed to enhance onsite SEO by extracting essential data and identifying common SEO problems. Users can download and crawl up to 500 URLs at no cost, or opt to purchase a license to eliminate this limitation and gain access to more advanced features. This tool is robust and adaptable, efficiently navigating both small and extensive websites while providing real-time analysis of the gathered data. By collecting crucial onsite information, it empowers SEO professionals to make well-informed decisions. Users can quickly crawl a website to uncover broken links (404 errors) and server issues, with the option to bulk export these errors along with their source URLs for resolution or to share with developers. It also aids in finding both temporary and permanent redirects, as well as identifying redirect chains and loops, and allows for the uploading of URL lists for auditing during site migrations. Additionally, during a crawl, the tool evaluates page titles and meta descriptions, helping to pinpoint those that may be too lengthy, too short, missing, or duplicated throughout the site, ultimately improving the overall SEO performance. This comprehensive approach ensures that users are equipped to optimize their websites effectively.

Our website crawler will capture a website's source code and perform site audits in real time so that you can analyze the results immediately. Our Technical SEO Spider is perfect for SEO agencies, web designers and businesses. Subscribe to our SEO software and you'll discover a new way to audit and analyze performance metrics for your website. The interface is simple and quick to use, and can be accessed from any device. Our software is aimed at SEO agencies, web designers and businesses that want to improve the performance of their website and its rankings. Our advanced website crawler captures all elements of a website code in real-time, and highlights any issues or errors. Code that is problematic can be caused by poor optimization, coding errors, PageSpeed Insights, and other unknown factors. Once the highlighted issues have been identified, our software will help you to correct these issues using our coding tools.

Introducing the ultimate content creation toolbox that transcends platforms and languages, enabling anyone to produce high-quality content without needing extensive expertise. This innovative solution works seamlessly across various languages and is designed for all your keyword needs. In just minutes, you can generate content suitable for link building, money-making blogs, private blog networks, and more! SCM pioneered the multi-language content generation landscape by avoiding restrictions tied to preset sources. With NEXT, we have further enhanced our capabilities by streamlining the content downloading and filtering systems, allowing users to discover a greater number of pages in various languages while minimizing low-quality or spammy content. Our efforts have led to a more efficient experience, thanks to a user interface that utilizes familiar elements found on countless websites. So how do we achieve this? By employing standard UI features that facilitate ease of use. Effortlessly draft and publish directly to WordPress, Blogger, or any website that permits posting via email. Maximize your link-building initiatives by producing keyword-focused articles for endless content submissions. You can easily incorporate images, videos, subheadings, lists, questions and answers, tweets, and much more, automating the addition of these elements for a smoother content creation experience. With this toolbox, the possibilities for enhancing your online presence are limitless.

Securing a new backlink often hinges on a numbers game, which means having access to link building tools that offer a plethora of link suggestions to underpin your campaigns. LinkAssistant stands out as the premier option when it comes to generating high volumes of potential backlinks. With an impressive daily crawl of 7.1 billion pages, this software can uncover backlink opportunities numbering in the hundreds or even thousands. However, the essence of link building transcends mere quantity; what you truly require is a tailored list that aligns with your specific strategy. Perhaps your focus is solely on tracking guest posts, but your current tools yield an overwhelming 500 directories and forums. This scenario illustrates where our software excels. By selecting a research method from ten of the most effective link prospecting techniques, you can align your search with your strategy. Whether you’re interested in guest posting avenues or active giveaways, utilizing the appropriate search method ensures you receive link suggestions that cater precisely to your current objectives, enhancing the efficiency of your link building efforts.

The free version of Keyworda offers over 1000 long-tail keyword suggestions for any given search term. It effectively targets keywords from both global and local search engines, as well as from social media and e-commerce sites. Unlike other keyword research tools such as Google Keyword Planner, Keyworda boasts an impressive reliability rate of 99.99%. Users can access Keyworda completely free of charge and without the need to create an account. This tool allows you to uncover a multitude of new long-tail keywords connected to any subject by generating suggestions based on search prompts from your selected platform. The suggestions are tailored according to the domain and language preferences you set. Are you a business owner, online marketer, or content creator? If that describes you, then you're probably eager to increase traffic to your website, engage more readers with your content, and boost sales of your products or services. Understanding what your potential customers or audience are searching for on Google is the simplest way to achieve this goal, and creating content based on those insights can lead to substantial growth for your business. By utilizing Keyworda, you can effectively align your content with the interests and queries of your target market.

HyperChecker backlink monitoring is an online SEO program that offers a free trial. This tool helps webmasters, link builders, SEO specialists keep backlinks in one place and monitor and track them. You will be able to see all pages that have been deleted or made inaccessible. This will allow to you to return the link at any time or request a refund. Monitoring the presence of backlinks on the page, actual anchors and texts, as well as rel attributes. Monitoring of redirects, tier links. Title, Http status, information from meta tags robots/XRobotsTag (noindex and nofollow), robots.txt. Number of external links, country IP, TLD. You can check the indexing of a page by adding backlinks to the Google search engine. You can limit access to an unlimited number performers and manage their work by viewing pre-made reports.

Rank Tracker allows users to search keyword ideas, analyze SERP competition and set up unlimited rank tracking. Rank Tracker is a local rank tracking software that accurately tracks positions for any location you choose: country, state or city, or even an exact street adress. These locations, like everything else in the keyword position tracker are unlimited. You'll be able to get the most precise keyword rank checking with the tool's 400+ search engines.

UrbiQuest serves as a comprehensive tool designed to manage all facets of your online presence efficiently. By offering an intuitive interface that eliminates the clutter of using multiple management applications, we streamline your operations. To provide you with a complete overview of your performance, UrbiQuest aggregates all relevant data. Every element, from security measures to social media interactions, website oversight, and email management, is thoroughly analyzed and presented in an understandable format. Additionally, we deliver detailed weekly reports on your activities, ensuring you stay informed. For those looking to enhance their skills further, we also offer personalized coaching sessions to support your growth. In this way, UrbiQuest not only simplifies management but also empowers users to achieve their online goals.

SEOCopilot provides a comprehensive suite of tools to enhance SEO performance and grow organic traffic automatically. By connecting to your website’s sitemap, SEOCopilot immediately begins indexing pages for Google and Bing, ensuring faster visibility on search engines. The platform’s backlink-building service helps improve domain authority by creating foundational links, and it allows users to monitor competitor backlinks to stay ahead in the rankings. SEOCopilot also optimizes your Google My Business profile, which is a key factor in driving local leads. The tool identifies low-performing pages, allowing users to prune or optimize content that isn’t generating traffic, helping maintain a clean and efficient website. Whether you are a startup or an established brand, SEOCopilot's automation saves time and boosts SEO performance, enabling you to focus on growing your business rather than handling repetitive SEO tasks.

ETTVI, a cloud-based SEO SaaS platform that is free of charge, was created to empower digital marketers with actionable results that will help them supercharge their marketing efforts. ETTVI has access to over 100 tools that will help you analyze, research and create successful online marketing strategies. ETTVI's SEO tools are based on Search Engine's latest algorithm updates. They meet the needs of every Digital Marketer. EETVI's freemium version doesn't require any billing or signups. ETTVI's SEO Tools fall under different categories such as On-Page SEO tools, Off-Page optimization tools, Content marketing tools, technical SEO tools, website maintenance tools, tools for website management, and tools for domains. They are all market-competitive and satisfy customers from the user's point of view. We are committed to creating highly functional and efficient tools for your significant growth, from auditing the site to conducting extensive research.