Best Free SEO Audit Tools to Analyze and Improve Your Website

I’ve run countless SEO audits throughout my career. There have been moments when I was strapped for time and manual checks just weren’t realistic.

If you’ve ever felt the same, you know how draining it is to inspect every detail of a website.

An SEO audit tool simplifies that process, letting me focus on creating content or building links instead of checking through code and meta tags.

I don’t want you to struggle without an easier way. In this article, I’ll share 14 of my favorite free SEO audit tools.

Here is a quick overview of the 14 in the list:

Along the way, I’ll also point out which tasks each one handles. It’s a real help for anyone who wants to speed up their SEO analysis and tackle the work that makes a difference.

Why Free SEO Audit Tools Matter

Most of us have budgets to consider. I’ve had moments when subscribing to premium tools just wasn’t possible.

The good news is that many free platforms do the job.

They may have some limits for example, a cap on the number of pages they crawl or monthly queries but for smaller projects or a quick insight, they can be extremely useful.

Another benefit is that free tools are often designed to be straightforward. This simplicity means fewer confusing dashboards and distractions.

Note: We have also made a list of the best SEO tools, if you want the overview.

I’ll never pretend free tools are flawless, but when it comes to making progress on your SEO checklist, they provide a solid starting point.

1. SEO.AI

I’ll be upfront: I work at SEO.AI, so it might not be a surprise that I’m mentioning it.

However, I genuinely believe it’s one of the best platforms when it comes to AI-driven SEO. SEO.AI is ranked as the #1 platform for AI SEO and can write and optimize all kinds of content—from product descriptions to long-form articles—while aligning with search engine algorithms.

Key Benefits:

• Real-time data insights and AI guidance on exactly what to optimize.
• Integrated AI chat that helps you effortlessly craft copy without switching tabs.
• Product feed optimization for better visibility in Google Shopping and Free Listings.
• Customizable brand voice training for consistent, on-brand content.

Personal Note: I’ve used SEO.AI to generate hundreds of product descriptions in one batch for an e-commerce project.

The built-in AI not only saved incredible amounts of time but also kept everything aligned with our SEO goals and brand tone.

You can start with a free trial and see how it handles both your written content and product feeds.

2. Google Search Console

When someone asks me for the single best free SEO tool, Google Search Console is always on my shortlist. I remember a time when a client’s homepage dropped in the rankings, and without Search Console data, I would have been completely in the dark.

Key Tasks It Covers:

• Checking for crawl errors (404 pages, server errors)
• Identifying indexation issues
• Monitoring organic keyword performance
• Reviewing mobile usability problems

3. Bing Webmaster Tools

Bing Webmaster Tools doesn’t always get attention, but I believe it’s an overlooked asset. It provides data on how Bing views your site. You might be focused on Google, but Bing still has a fair amount of search traffic. Often, if your site is in good shape for Bing, it’s probably fine with Google, too.

Key Tasks It Covers:

• Site Explorer for checking structure and indexing
• Keyword Research that shows searches made on Bing
• Scanning for malware or security threats

4. Screaming Frog (Free Version)

Screaming Frog remains one of my favorite desktop-based crawlers. The free version limits you to crawling 500 URLs, but for a small website or sampling a section of a larger domain, it’s very useful.

Core Strengths:

• Finding missing meta titles, H1s, or alt text
• Spotting broken links quickly
• Checking for duplicate content

5. Ubersuggest

Introduced by Neil Patel, Ubersuggest has earned its place as a popular free alternative to paid platforms. Its free plan has daily search limits, but it can handle the basics of SEO audits and keyword tracking.

What It Does Best:

• Basic site audits for page speed, on-page details, and indexation status
• Keyword research to uncover new ranking opportunities
• Competitor analysis (though limited without a subscription)

6. SEOquake

SEOquake is a page-by-page SEO checker that works as a browser extension from Semrush. It’s especially handy for quick checks without leaving your current tab.

Best Use Cases:

• Quick reviews of a page’s meta tags and keyword use
• Comparing domain metrics like Alexa or SEMrush rank
• Reviewing internal and external links on a page

7. SEOptimer

SEOptimer is a straightforward tool that provides a free on-page audit. It makes it easy to review your site’s performance in areas like meta tags, page structure, and mobile readiness.

Highlights:

• Generates an overall SEO score so you can track improvement over time
• Separates technical issues from content-based issues
• Offers quick suggestions for fixes

8. SEOMater

If you want an automated yet detailed scan, SEOMater (free version) can be a good choice. The interface is simple, although it might not have the name recognition of larger tools.

What You Get:

• On-page details like heading structure and broken links
• Basic domain authority insights and link metrics
• A summary of page speed details

9. GTmetrix

Site speed audits are a big part of my SEO routine. GTmetrix is my choice for analyzing how fast a page loads. It’s surprising how often slow pages affect a site’s performance.

Key Features:

• Performance Report with waterfall charts to see which items are slowing you down
• Recommendations for compressing images or minifying code
• Although historical data is limited, you can run multiple tests manually

10. PageSpeed Insights

For a speed analysis backed by Google, PageSpeed Insights is the tool to use. It provides a performance score for both desktop and mobile and shows what fixes are needed according to Google.

Key Areas:

• Core Web Vitals (Largest Contentful Paint, First Input Delay, Cumulative Layout Shift)
• Render-blocking resources that affect above-the-fold content
• Suggestions for tweaking images, JavaScript, and CSS

11. SEO Site Checkup

SEO Site Checkup produces a one-page report card for your website, rating it on various SEO factors. It also checks your SSL certificate status, domain expiry, and sitemap.

Things I Value:

• A list of daily SEO tasks to address
• An overview of backlink counts to check link-building efforts
• Basic security assessments

12. Woorank (Free Trial)

Woorank isn’t completely free, but it does offer a limited free trial. It quickly identifies on-page issues, provides keyword analysis, and gives a look at competitor performance. I found it nearly an all-in-one SEO solution during the trial period.

Key Features:

• A marketing checklist ideal for beginners who need a step-by-step approach
• Social media data showing how a site fares socially
• Technical factors like robots.txt evaluation and structured data

13. MozBar (Extension)

MozBar is a free browser extension from Moz that shows domain authority (DA), page authority (PA), and spam scores as you browse. It’s designed for quick checks rather than in-depth audits, making it a handy companion for checking competitors.

Use Cases:

• Evaluating a competitor’s DA and PA
• Checking link metrics quickly
• Analyzing meta tags right in your browser

14. SEO Minion

SEO Minion is a browser extension that helps check on-page SEO, list all links, and show localized search results for different locations. While it isn’t a website crawler like Screaming Frog, it’s great for single-page reviews or quick competitor snapshots.

Key Functions:

• SERP Preview to see how your title and meta description might appear
• Checking for broken links on the page you’re viewing
• Simulating search results from other countries

Comparison Table

Below is a concise table to compare these 14 tools at a glance.

My Personal Workflow with Free Tools

I usually start audits by verifying my site with Google Search Console. That’s step one because it ensures Google sees everything correctly.

Next, I might run a quick crawl with Screaming Frog (using the free version for small sites). During that crawl, I check for major issues:

• 404 pages or broken links
• Missing meta titles or descriptions
• Duplicate content

After that, I run the domain through Ubersuggest or SEOptimer to get a second perspective. For larger websites, I check selected groups of URLs in Screaming Frog to stay within the 500 URL limit.

I then move on to PageSpeed Insights or GTmetrix because speed is key for user experience and search performance.

If the site has an international audience, I also test localized search results with SEO Minion.

Handling Limitations

It’s true that many free tools have some limits. They might restrict how many pages you can crawl or how many queries you can run each day, or they might not show in-depth competitor data.

Here’s how I deal with it:

1. Plan the audit in stages. If Screaming Frog’s free version only allows 500 URLs, I might first crawl the blog, export that data, then handle the product pages separately.
2. Cross-check with multiple tools. If one platform runs out of queries, I switch to another. This also provides a more balanced view.
3. Record what you check. I keep a simple spreadsheet with the tool I used, the date, and the metrics I found. This way, I know which tool provided which insights.

Many times, the free versions give enough direction for small to medium-sized websites.

Only if you’re dealing with large enterprise sites might you need advanced crawling features and higher data allowances from paid tools.

FAQ

What Are the Best Free SEO Audit Tools?

Several tools are considered top-tier for free SEO audits, including Google Search Console, SEMrush's free version, and Ubersuggest. Each offers unique features to help analyze and improve your website's SEO performance.

How Do Free SEO Audit Tools Work?

Free SEO audit tools analyze various aspects of your website, such as keyword usage, backlinks, and site structure. They provide insights and recommendations to enhance your site's visibility and ranking on search engines.

Can Free SEO Tools Replace Paid Versions?

While free SEO tools offer valuable insights, they often have limitations compared to paid versions. Paid tools typically provide more comprehensive data, advanced features, and in-depth analysis, making them more suitable for professional use.

Are Free SEO Audit Tools Accurate?

Free SEO audit tools are generally accurate for basic analysis and recommendations. However, for more detailed and precise data, especially for competitive industries, paid tools might be necessary.

How Often Should I Use SEO Audit Tools?

It's advisable to use SEO audit tools regularly, such as monthly or quarterly, to ensure your website remains optimized and to track improvements over time. Regular audits help identify new opportunities and address any emerging issues promptly.