7 Best Free SEO Tools in 2026: Our Top Picks

SEO tools can be expensive: many professional platforms charge hundreds of dollars a month. But do you really need to spend that much? Or are there free alternatives that get the job done?

Whether you want a permanently free solution or just want to test-drive SEO platforms without commitment, we’ll show you which tools are truly free and where they fall short.

SEO tools generally fall into two categories: those that provide data about your own website and full-featured SEO suites for deeper analysis.

Let’s start with the first group. Free tools here are plentiful, and many come straight from Google:

Full-featured SEO suites go far beyond Google’s tools. They include keyword research, competitor analysis, backlink tracking, and technical audits. Most are paid, but some providers offer free plans or tools that let you use the platform with limitations.

We’ve reviewed a range of options and compared their free versions with their paid offerings. For in-depth reviews of the premium tools, refer to our SEO tool comparison.

Here’s our top 7 list of the best free SEO tools:

Ahrefs is one of the most widely used SEO tools, especially for its massive, up-to-date backlink index.

What many don’t realize: Ahrefs offers a permanently free version called Ahrefs Webmaster Tools, built specifically for website owners. All you need is an Ahrefs account, no payment method required.

The Webmaster Tools only cover your own domain, so you can’t analyze other websites. But for a free tool, the features are surprisingly robust. You get nearly unrestricted access to the Site Explorer, Site Audit, and Backlink Index for your own site.

The Site Audit checks your website against over 170 technical SEO factors and sorts issues into errors, warnings, and notices. The Site Explorer shows your organic keywords, traffic estimates, and backlink profile.

One of the main limitations is that Ahrefs Free focuses on your own domain. To check competitors, find new keyword ideas, or analyze other websites, the free version won’t cut it. Features like Keyword Explorer, Content Explorer, and competitor analysis are reserved for paid plans.

The data history is limited, too. Historical data access is more limited in the free version than in Ahrefs’ paid plans. The interface is also packed with information and can feel overwhelming. If you’re new to SEO, expect to spend some time getting familiar with it.

To analyze other websites, you’ll need one of Ahrefs’ paid plans. Unfortunately, they tend to be priced higher than many competing SEO platforms.

Sistrix is a European-based SEO platform known for its Visibility Index, a widely used metric for tracking how visible a website is on Google. Sistrix also offers a free version called Sistrix Smart, designed for beginners with smaller websites.

Sistrix Smart only works with one domain, but it’s a great way to get started with on-page SEO. After you set up a project, the tool crawls up to 1,000 pages on your site and checks them against more than 100 criteria, from missing meta titles to broken links and technical errors.

The detailed explanations for each issue are what make it really useful. Sistrix doesn’t just flag problems; it also gives you clear, actionable fixes. That’s very valuable for beginners, who can learn to spot technical issues while building their SEO knowledge. Sistrix Smart also tracks your site’s visibility trends, key rankings, and top competitors.

The free version of Sistrix only works with one domain. You can’t analyze competitor websites or manage multiple projects. Keyword tracking is also limited to 100 terms, and you can only run one manual crawl per week.

If you need to research new keywords or run in-depth competitor analysis, you’ll have to upgrade to a paid plan. And those plans don’t come cheap:

Screaming Frog SEO Spider is a specialized site audit tool for technical website analysis. Unlike most SEO tools, it doesn’t run in your browser. It’s a desktop app that crawls your site locally on your computer, not on a provider’s servers.

The free version of Screaming Frog lets you crawl up to 500 URLs without even creating an account.

Before you start, you can fine-tune the crawl settings. The tool analyzes a wide range of technical website factors: missing meta titles, broken links, redirect chains, duplicate content, load times, and JavaScript errors.

After the crawl, Screaming Frog shows all the URLs it found, the factors it analyzed, and detailed information for each page, all in one view.

In the Issues tab, Screaming Frog prioritizes problems automatically and shows how many URLs each one affects. Click any error for a detailed explanation and clear steps to fix it.

The 500-URL limit means the free version falls short for larger websites. It also can’t render JavaScript, and modern sites load a lot of content dynamically. To crawl those sites, you’ll need the paid annual license. The interface is fairly complex, too. Instead of a simple overall score, you have to interpret each error yourself.

Ubersuggest* is a beginner-friendly SEO suite focused on keyword research and competitor analysis. It’s run by SEO expert Neil Patel. The free version lets you run three searches per day. You’ll need an account, but no payment details.

With just three searches per day, the free version is better for trying things out than for daily use. You can do keyword research, domain analysis, and basic site audits, but you’ll hit the daily limit fast.

Ubersuggest stood out in our test for its keyword data. In our evaluation, Ubersuggest provided many keyword suggestions and detailed search volume data. That makes Ubersuggest a solid free option for occasional keyword research.

The interface is beginner-friendly too. Key terms are explained right in the tool, a guided setup gets you going quickly, and clear visuals help you understand the data at a glance.

The biggest drawback is the three-search daily limit. If you want to use the tool regularly, that won’t cut it.

The good news is that upgrading won’t break the bank. Ubersuggest is one of the most affordable all-in-one SEO tools in our comparison:

But even the paid version is missing some features. Backlink analysis lacks important filters like IP addresses or traffic, and there’s no API access or white-label reporting.

Semrush* is one of the most widely used marketing platforms. It covers SEO, content marketing, social media, and paid advertising. The free version allows 10 searches per day. You’ll need to create an account, but you won’t have to enter payment details.

With only 10 searches per day, Semrush’s free version is better for testing than regular use. The competitor analysis tool shows traffic estimates, organic keywords, and top competitors for any domain.

You can also run a site audit, though it’s limited to 100 crawled pages. To track your own domain over time, set up a project and monitor basic rankings for free.

On top of the ten-query daily limit, the free version is missing some key features. There’s no historical data, so you can’t track traffic or ranking trends. Backlink analysis, the keyword gap tool, and in-depth competitor comparisons are also reserved for paid plans.

The free version is enough to get familiar with the platform and run the occasional one-off analysis. But for regular SEO work, the restrictions are too tight.

Overall, Semrush is one of the most expensive SEO tools in our comparison:

AnswerThePublic isn’t a full SEO suite but a specialized keyword research tool. It shows the questions, comparisons, and phrases people use around a search term. The free version lets you run three searches a day without signing up.

Enter a seed keyword, and AnswerThePublic builds a visual breakdown of the questions, prepositions, comparisons, and related terms people search for around that topic.

You can view the results as a sunburst diagram or a list. That makes the tool great for brainstorming new topics, planning articles, building FAQ sections, and organizing content clusters.

If you create content regularly and want to know what your audience is really asking, this tool gives you quick, actionable ideas.

The biggest limit is three searches per day. You also can’t export results in the free version.

It also skips standard SEO metrics like search volume, keyword difficulty, or CPC. But that’s by design, not a free-version limit. AnswerThePublic focuses on what people are asking, not the numbers behind it.

That’s why a full keyword strategy always needs a second tool.

Moz* is one of the oldest and most well-known names in SEO. The Seattle-based company popularized metrics like Domain Authority and Page Authority, which are still widely used today.

The free version gives you permanent access to some core features but limits you to just two searches per day. You’ll need to create an account, but you won’t have to enter any payment details.

The free version focuses on backlink analysis and keyword research. Moz maintains a large backlink index and is widely known for its link analysis capabilities. In our evaluation, it identified a high number of referring domains relative to other tools we reviewed.

Another plus is the MozBar. This free browser extension shows key metrics like Domain Authority, Page Authority, and backlink data right in Google's search results, even for free users.

With only two searches per day, the free version isn’t practical for regular analysis. A few limitations apply to all Moz plans. Even the full version doesn't provide traffic estimates for other websites, despite Moz maintaining a solid backlink index.

Thinking about upgrading to a paid plan? Moz is priced in the mid-to-high range but doesn’t offer the same features as more modern tools.

The tools above are free to use indefinitely. But some SEO platforms also offer time-limited trials that let you test every feature. Just remember: most require payment details up front, so cancel before the trial ends if you would rather not be charged.

Here are some SEO tools that offer free trials:

SEO doesn’t have to be expensive. On a tight budget, a combination of Google's free tools (Search Console, Analytics, Trends, and PageSpeed Insights), Ahrefs Free, Sistrix Smart, and Screaming Frog can cover many common SEO tasks.

But if you need more advanced features, you’ll eventually have to invest in a paid SEO platform. The good news: many providers offer free trials, so you can test everything before committing.

Still looking for the right SEO suite? We put nine popular SEO tools to the test to help you decide.