You can run a credible SEO routine without a paid subscription, as long as you pick tools that answer different questions and you know where each one stops. This guide to the best free SEO tools sorts them by the job they do: finding what Google sees, researching topics, auditing a site, checking speed, monitoring links and watching visitor behavior. Each entry notes the limits stated in the vendor’s own documentation, so you can plan around them.
Key takeaways
- Start with Google Search Console. It is the only source of first-party data on how your site performs in Google Search.
- Free versions have real limits. Screaming Frog’s free crawler stops at 500 URLs per crawl, and Ahrefs’ free tools work only on sites you have verified.
- Google Trends shows relative interest, not search volume, and Keyword Planner requires a Google Ads account.
- Use different tools for different questions: Search Console for diagnosis, PageSpeed Insights for speed, a crawler for site-wide issues, and a backlink tool for links.
- No free tool replaces judgment. They surface issues, and you still need to prioritize and fix them.
The short list
| Tool | Best for | Documented limit to know |
|---|---|---|
| Google Search Console | Queries, clicks, indexing, sitemaps | Only for sites you can verify |
| PageSpeed Insights | Field and lab speed data | One URL at a time |
| Lighthouse | Repeatable page audits | Lab data, results vary between runs |
| Rich Results Test | Checking structured data | Valid markup does not guarantee a rich result |
| Screaming Frog SEO Spider (free) | Site-wide technical crawl | 500 URLs per crawl, no saved crawls |
| Ahrefs free tools | Backlinks, audit and keywords for your own sites | Verified sites only, capped credits and rows |
| Bing Webmaster Tools | A second source of search data | Covers Bing, not Google |
| Google Trends | Seasonality and rising topics | Sampled and relative, not volumes |
| Google Keyword Planner | Keyword ideas | Needs a Google Ads account |
| Microsoft Clarity | Heatmaps and session recordings | Behavior data, not rankings |
Google’s own tools: the foundation
Google Search Console
The Performance report shows clicks, impressions, click-through rate and average position, and you can break the data down by query, page, country, device and search appearance. The default view covers the past three months. A practical use is to filter for pages that earn impressions but few clicks, then rewrite the title or description to better match what searchers wanted. Our Search Console guide walks through setup.
URL Inspection (inside Search Console)
This shows how Google sees one specific page: whether it is indexed, how it was discovered, when it was last crawled, and which canonical Google selected. The live test fetches the page in real time, which helps confirm a fix, but a passing result does not guarantee indexing. You can request indexing, though requests are limited daily and do not guarantee inclusion.
PageSpeed Insights and Lighthouse
PageSpeed Insights combines field data from the Chrome User Experience Report (a rolling 28-day window of real visits) with a Lighthouse lab run. That pairing is the point: the field section tells you whether real visitors have a problem, and the lab section suggests why. Lighthouse itself is open source and runs in Chrome DevTools, from the command line, or inside PageSpeed Insights, auditing performance, accessibility, best practices and SEO. See our Core Web Vitals guide for how to interpret the numbers.
Rich Results Test
Use it to check structured data before and after publishing. Google is clear that valid markup does not guarantee a rich result, because the algorithm chooses what to show for each user, and the markup must reflect content visible on the page.
Free tools for research
Google Trends
Trends uses a sample of Google searches and scales each data point from 0 to 100 based on a topic’s share of searches for the chosen place and time. That makes it good for comparing two phrasings, spotting seasonality and seeing whether interest is rising. It is not good for estimating how many searches a month a term gets, and low-volume terms can show as zero. For a workflow, see how to use Google Trends for SEO.
Google Keyword Planner
Keyword Planner lives in the Google Ads Tools menu. Google’s documentation says you must complete account setup, including entering billing information, to use basic features such as getting keyword ideas. Treat the figures as directional estimates and cross-check them against what Search Console shows for pages you already have.
Your own Search Console queries
For a site that already has some traffic, the best keyword list is the one Search Console gives you for free: queries you already appear for, particularly those where you rank on the second page or have a low click-through rate.
Free tools for technical audits
Screaming Frog SEO Spider (free version)
The free version crawls up to 500 URLs per crawl. Crawls cannot be saved, configuration options are unavailable, and features such as JavaScript rendering, Search Console integration and custom extraction need a paid licence. For a small business site, 500 URLs covers a lot: broken links, redirects, missing titles, duplicate headings and noindex directives.
Ahrefs free tools
Ahrefs offers free access for verified sites you own. Its documentation lists a site audit checking 170+ issues with 5,000 crawl credits per project per month, and Site Explorer access limited to 1,000 backlinks and 1,000 keywords visible at once. Competitor analysis of sites you have not verified requires a paid plan.
Bing Webmaster Tools
A second set of search data and diagnostics from Microsoft (our playbook on how to rank on Bing shows how to use it). It is also where site owners can work with IndexNow, an open-source protocol that notifies participating search engines when content is added, updated or deleted. Check which engines currently participate before relying on it, since support varies by search engine.
Free tools for behavior
Microsoft Clarity
Microsoft describes Clarity as free, offering heatmaps for clicks and scrolling and recordings of user sessions. It answers a question rankings cannot: what do visitors do once they arrive? Review its masking and consent settings before installing, and update your privacy policy accordingly.
Free tools for local visibility
Google Business Profile
For local businesses, the profile is the most important asset you manage directly. Google says local results are based mainly on relevance, distance and prominence, and that you cannot request or pay for a better local ranking. See our Google Business Profile guide for the setup checklist.
What free tools do not cover
Be honest about the gaps. Free tools generally do not give you competitor keyword and backlink data at scale, daily rank tracking across many locations, or tracking of how you appear in AI answers. For the latter, a manual routine is possible: pick your top informational queries from Search Console, run them yourself, and note whether AI features appear and which sources they cite. Our guide to ranking in Google AI Overviews covers formatting. For more on link tools, see free backlink checker tools.
How to choose by goal
| If you want to know… | Start with | Then check |
|---|---|---|
| Which searches already bring people to my site | Search Console Performance report | Google Trends for seasonality |
| Why one page is not in Google | URL Inspection | Sitemaps report and a crawler |
| Whether my site feels fast to real visitors | PageSpeed Insights field data | Lighthouse in DevTools for diagnosis |
| What is broken across the whole site | Screaming Frog free crawl | Ahrefs site audit for a second opinion |
| Who links to my site | Ahrefs free tools | Search Console links data |
| What visitors do after they land | Microsoft Clarity | Your own conversion tracking |
The pattern is to begin with the tool closest to the source of the data. Search Console and PageSpeed Insights report what Google and real browsers observed. Third-party tools estimate or sample, which is useful for direction but should not be quoted as fact.
Worked example: a 45-minute weekly routine
Example scenario: a hypothetical bakery with a 60-page website and one shop wants a lightweight routine using only free tools.
- 10 minutes, Search Console: open the Performance report, filter to the last 28 days, and note the three pages with the most impressions and the lowest click-through rate.
- 10 minutes, rewrite: change titles and descriptions on those pages to match the language of the queries that appear for them.
- 10 minutes, URL Inspection: confirm a newly published page is indexed, and request indexing if it is not.
- 10 minutes, PageSpeed Insights: test the homepage and one product page, and note any field metric that is not good.
- 5 minutes, log: write down what you changed and the date, so you can compare performance later.
Once a quarter, add a Screaming Frog crawl of the whole site (comfortably under 500 URLs) to catch broken links and missing titles. For a fuller quarterly review, work through our DIY SEO audit template.
Reading the results sensibly
A few habits keep free data from misleading you. Compare like with like: the same date range, the same device, and the same page group. Change one thing at a time on a page so you know what moved the numbers. Expect delay, since Search Console data and Core Web Vitals field data both lag behind your changes. And write down every change with a date, because a log is the only way to explain a trend three months later.
Common mistakes
- Treating third-party difficulty and volume numbers as facts. They are estimates.
- Reading Google Trends as search volume.
- Running a crawler but never fixing what it reports.
- Installing behavior-tracking tools without updating privacy disclosures.
- Collecting tools instead of building a routine.
If you outgrow free tools, what SEO costs explains typical spend.
Frequently asked questions
What is the best free SEO tool?
Google Search Console, because it is first-party data about your own site in Google Search. Everything else supplements it.
Is the free Screaming Frog enough?
For a site under 500 URLs, usually yes for a basic crawl. You lose saved crawls, configuration and integrations.
Can I spy on competitors with free tools?
Only a little. Ahrefs’ free tools work on sites you own, so competitor backlink analysis needs a paid plan.
Sources
- Search Console Help: Performance report
- Search Console Help: URL Inspection tool
- PageSpeed Insights: About
- Screaming Frog SEO Spider FAQ
- Ahrefs Webmaster Tools
- Google Trends Help: How Trends data is adjusted
If you want help choosing a stack, you can contact SSA Agency.