18 Open-source Free SEO tools to improve your site performance

Search Engine Optimization (SEO) is essential for getting your website known, and ranked in search engines like Google, Bing, Yahoo, and Yandex.

Webmasters and website admins should keep their websites search engine-friendly and SEO optimized to have their website pages indexed and parsed successfully by search engine bots.

SEO practice requires a lot of time and does not get the results instantly as many may expect. It needs constant website monitoring, scanning, fixing, and improvements.

In this article, we present you with a collection of open-source SEO tools and projects. These tools will help you to improve and optimize your website for better Google Preranking and more website visits.

If you are looking for open-source social media management tools, we got you covered with this article: Best 12 Open-source social media management tools for Business.

Open-source SEO tools

1- Serposcope

Serposcope is a free and open-source website ranking tracker in Google search. It is built to help webmasters and content creators improve their SEO performances. Serposcope monitor and track an unlimited number of website and search keywords, which means it can help you to track your competitors and improve your keywords. Multi-user accounts are a primary feature for Serposcope. It also can run seamlessly on any local desktop machine or at a remote server. Serposcope is released as open-source software under MIT license.

2- SEOstats

SEOstats is an open-source script built to retrieve several SEO metrics. It helps webmasters track their current stats at Alexa, Google PageRank, social visibility, backlink data, search index, and more. Currently, SEOstats gathers information from more than 50 sources which include: Google, Alexa, Mozscape, SEMRush, Open-Site-Explorer, Facebook, Twitter, and more. The project has not been updated by the developer for years, and it requires PHP 5.3 to run.

3- Advertools

Advertools is an open-source online marketing productivity tool. It features SEO crawler, analyzer, XML sitemap downloader, SERP importer, text analysts kit, text extractor, stopwords dictionary in many languages, social media analysis, and more.

4- Koalati

Koalati is an open-source on-site SEO checker and analytics tool. It checks your site and provides you with a list of suggestions to improve your SEO performance page ranking.

5- SEO Panel

SEO Panel is an award-wining open-source SEO control panel for webmasters and content creators.SEO Panel features include automatic directory submission, keywords position checker, search engine saturation checker, site auditor, MOZ Rank checker, PageSpeed insights, BackLink checker, Google/ Alexa Rank checker, and several webmaster tools. The project is free and open-source. It has a set of useful plugins which you can use to extend its functionalities.

6- Glomi Tools

Glomi tools is an open-source SEO package. It is built to help web engineers, security analysts, and SEO experts improve their websites. With its simple interface that features a domain search and returns the results in form of suggestions, it is straightforward for all sorts of users.

7- SEOMacroscope

SEOMacroscope is a useful tool that helps you to monitor your site for broken links and offers a good deal of other SEO-related tools. The programs analyze and scan your site links stats and report back about the broken, redirect, and other links. It supports multiple site scanning, multilingual websites, metadata extraction to PDF files, and offers a nice spreadsheet reporting.SEOMacroscope runs primarily in Windows, but you can run it with emulators in Linux and macOS. Keep in mind, the program is under continuous development, so expect more features in the future.

8- WordPress SEO

WordPress is the most popular open-source CMS, It comes fully packed with a dozen of SEO-friendly features like custom permalinks and SEO-friendly URLs. However, the webmaster has many tasks to make his WordPress install SEO-ready. Yoast is an open-source SEO extension (plugin) for WordPress, which automate dozens of SEO tasks and offers more SEO-customization option for your WordPress site. The developer generously released it for free as an open-source project while continuing to provide support and development for it.

9- SEOTools for Laravel

Laravel is a popular open-source PHP framework for developing complex web apps. SEO Tools is an SEO library for Laravel projects. It comes with a simple and friendly user interface, features titles and meta-tags editing, setting the meta-tags for Twitter Cards and Facebook Open Graph. If you are a Laravel developer, you should consider using this library to boost your SEO settings.

10- OSAT

OSAT is a collection of tools created to help webmasters and content creators keep tracking their SEO performance. OSAT tools include multi-user support, multi-organization support, Lighthouse score, SERP rank checker, Keywords finder, extractor (header, links, images), sitemap extractor, and content summarizer. Furthermore, OSAT also offers a security audit for websites which is a unique feature that you cannot find in other projects in this list.

11- HTTP-Status-Check

This is a command-line application for checking website and page HTTP status codes. All you have to do is: write a simple command and read the output log text file. It is a useful tool if you want something quick, reliable without a complicated user interface or complex options.

12- Keyword Generator

Keywords-generator is a command-line tool that helps you generate keywords with simple commands. As a python script, you can install it on your machine whatever the operating system (Windows, Linux, or macOS), with only one requirement: Python.

13- Python SEO Analyzer

A SEO tool that works as a site analyzer, check and warn against any SEO issues or problems. It is built also with Python, and offers two installation methods: 1) through Python PIP3, 2) Docker.

14- Keyword-list-generator

Keyword-list-generator is a simple tool that helps you generate keywords lists from any giving text. It ignores the common and stop words, skip numbers and symbols, and generates a clean sorted list output. The entered text should be clean from any HTML/ XML code.

15- Longtail keywords generator

A simple HTML/ JavaScript app to help SEO masters create long-tail keywords that can be used and targeted by content creators.

16- Keyword Extract

Keyword-extract is (as the name suggests) a keyword-extractor script from any web page. It is also a command-line application built with Node.js and released as an open-source under MIT license.

17- OpenSEO

OpenSEO is an abandoned open-source SEO tool project, which built on top of WebSharper framework.

18- SEOSuite

SEOSuite is a collection of SEO tools to help webmasters fix their SEO issues. It includes SEO Crawler: crawls any site and index it in a database, SEO Linter: check HTML for errors, ⁣SEO Reporter: outputs the crawling report in many formats, ⁣, and SEODashboard which displays the data in the browser. Note that, the project is no longer maintained.

Wrapping up

As we came to the end of this article, we listed the most usable open-source SEO tools out there. If you know of any other free Libre (open-source) tool that we missed, please write it down in the comments below.