The 29 Best Free SEO Tools for 2026

In this article, you’ll find 34 free SEO tools grouped by what they actually help you do, from finding keywords to fixing technical issues to tracking how ChatGPT and Perplexity recommend your brand. Skim straight to the section you need, or work through the list to assemble a complete free stack.

Keyword research tools

Free keyword tools rarely match the depth of paid platforms, but you can do real keyword research if you sequence the right ones. Start with a generator, validate volume and difficulty, then layer in question and trend tools to find sub-topics worth covering.

1. Analyze AI Keyword Generator

Find hundreds of keyword ideas in seconds.

The Keyword Generator returns up to 100 ideas for any seed keyword, each one paired with monthly search volume, keyword difficulty, and the country it applies to. Toggle between standard keywords and questions to find the informational variants worth turning into blog posts. For a deeper walk through how to filter and prioritize the output, see our guide on SEO keywords.

2. Google Keyword Planner

Get keyword ideas straight from Google Ads.

Google Keyword Planner is built for advertisers, but the keyword data is usable for SEO. The catch is that volumes are shown in ranges like 10K to 100K unless you have an active Ads spend. Where it shines is semantic discovery. Enter “coffee” and Planner returns “nespresso pods”, “espresso”, “french press”, and “breville barista express”, none of which contain your seed term but all of which match the topic.

3. Analyze AI Keyword Difficulty Checker

See how hard it will be to rank for any keyword.

The Keyword Difficulty Checker returns a 0 to 100 score based on the strength of the top ten ranking pages. Anything above 70 typically requires a domain with strong topical authority and a real backlink profile. Anything under 30 is fair game for newer sites. Pair it with the Keyword Generator output to filter ideas before you commit to writing anything.

4. AlsoAsked

Map out the questions buried in Google’s “People Also Ask”.

AlsoAsked scrapes Google’s People Also Ask boxes and renders them as a tree, so you can see how questions branch off a parent topic. Use it to find subtopics worth answering inside an existing article instead of cluttering your editorial calendar with thin standalone pages. For more on optimizing for the PAA box and tracking it in AI engines, see our guide on People Also Ask.

5. Google Trends

Spot rising and declining topics before competitors do.

Trends shows the relative popularity of a topic over time, by country, and against comparable queries. Two reports are worth your attention. The “Related queries” panel surfaces breakout terms gaining momentum, often months before search volume tools catch up. The compare view tells you whether your topic is trending up or sliding into irrelevance, which is sometimes the most useful intel a free tool can give you.

6. Keyworddit

Pull keyword ideas from Reddit communities.

Keyworddit extracts the most-used phrases inside any subreddit and pairs them with monthly search volume. Search r/bigseo and you get the language SEOs actually use when they discuss their problems, which is often more specific than what generic keyword tools surface. Click any result to see the Reddit threads where the term appears, which doubles as customer research.

7. Analyze AI Bing Keyword Tool

Find keyword ideas worth ranking for on Bing.

Bing accounts for a small share of global desktop search, but it powers Copilot answers and feeds parts of ChatGPT’s web browsing. Targeting Bing keywords is a quiet way to earn AI search citations through a different door. The Bing Keyword Tool surfaces the queries people actually run on Bing, complete with monthly volume.

8. Analyze AI YouTube Keyword Tool

Get keyword ideas for YouTube content.

YouTube is the second largest search engine in the world and a frequent source for AI search engines that pull from video content. The YouTube Keyword Tool returns the queries with the highest search volume on YouTube, which is rarely the same list as the one Google Keyword Planner returns for the same seed.

9. Analyze AI Amazon Keyword Tool

Align product listings with shopper intent.

If you sell physical products, Amazon’s autocomplete is the closest thing to a real-time signal of buyer intent. The Amazon Keyword Tool surfaces those queries at scale so you can rewrite product titles, descriptions, and bullets to match how buyers actually search.

Tools for AI search research

Keyword volumes tell you what people search for on Google. They tell you nothing about what surfaces inside ChatGPT, Perplexity, Claude, or Gemini. The five tools below close that gap.

10. ChatGPT, Perplexity, Gemini, and Claude

Free AI search engines you can use as research tools.

The fastest way to understand AI search is to use it. Run your most important commercial keywords as natural prompts in ChatGPT, Perplexity, Gemini, and Claude. Pay attention to which brands get cited, which sources are linked, and how each engine frames the answer. Repeat the prompt a few times. Models will sometimes return different answer sets, and consistency is itself a signal of how stable a brand’s visibility is. This is manual, slow, and unstructured, but it costs nothing and it forces you to read the answers your buyers are reading.

11. Analyze AI AI Search Explorer

Run any prompt across major AI engines side by side.

The AI Search Explorer turns the manual workflow above into a structured one. Enter any prompt and Analyze AI runs it across ChatGPT, Perplexity, Gemini, and Copilot at the same time, then returns a side by side breakdown of which brands each engine recommends, in what order, and which sources each one cited. Use it to validate ideas before you commit them to a tracking campaign.

12. Analyze AI Prompt Discovery

Find the prompts your buyers actually run.

Prompt Discovery surfaces real prompts in your category that buyers are likely to run, suggesting them based on your domain, competitors, and topic clusters. Review the suggestions, accept the ones that match real buying intent into your tracked set, then watch how visibility shifts week over week. The suggested prompt list alone is often worth the signup, even before you start tracking.

13. Analyze AI Free AI Website Audit Tool

Check how AI engines see and parse your site.

This tool inspects your site for the technical elements that influence AI crawlers, including structured data, meta information, internal linking, and how cleanly your content is rendered. It returns a list of fixes prioritized by impact. If you are getting started with generative engine optimization, run this audit before doing anything else.

14. LLM.txt Generator

Tell AI crawlers which content matters on your site.

llm.txt is a simple text file that points AI crawlers at the most important content on your site, similar in spirit to a sitemap. The generator builds the file for you in seconds. For background on the format and how it compares to other tools that produce it, our roundup of LLM.txt generator tools walks through the differences.

SERP and rank tracking

15. Analyze AI SERP Checker

See the top ranking pages for any keyword in any country.

The SERP Checker pulls unpersonalized Google results so you can see what ranks where you do not. The first three results include domain authority, backlink count, and traffic estimates, which is enough to assess whether a SERP is dominated by big brands or open to challengers. This is the first check before you commit a writer to any keyword.

16. Analyze AI Keyword Rank Checker

Check where your site ranks for any keyword.

Drop in a domain and a keyword to see your current Google position. Useful for one-off rank checks during outreach calls, content audits, or when you want to verify a recent ranking change without setting up a full rank tracker. For ongoing tracking, see our list of keyword tracking tools.

17. BrightLocal Local SERP Checker

Pull search results from a specific city or zip code.

For local businesses, national rankings hide the truth. BrightLocal lets you simulate searches from any city, town, or zip code, including the option to view Google Maps results directly. If you run a service business or a multi-location brand, run a search from each location at least once a month to spot drift before customers do.

On-page and technical SEO

18. Google Search Console

The closest thing to a direct line into Google.

GSC is the only source of first-party data on how your site performs in Google search. Three reports do most of the work. Performance shows the queries you rank for, the pages they land on, and click-through rates. Pages tells you what Google is and is not indexing. URL Inspection diagnoses individual page issues. GSC stores 16 months of data, so export it regularly to a spreadsheet if you want longer trends.

19. RankMath

Manage on-page SEO inside WordPress.

RankMath handles the basics that make WordPress sites SEO ready, including title tags, meta descriptions, OG tags, redirects, broken link detection, and schema markup. The schema library is the standout, with templates for FAQ, Product, How-To, Recipe, and a few dozen others. Yoast covers similar ground, but RankMath’s free tier is more generous.

20. HigherVisibility’s SERP Snippet Optimizer

Preview how your page will look in Google results.

Enter your title, URL, and meta description and the tool renders the SERP snippet exactly as Google will display it. The pixel counter is the actual reason to use this. Google truncates titles around 580 pixels and meta descriptions around 990 pixels, and characters are not all the same width.

21. Merkle Schema Markup Generator

Generate JSON-LD schema for any page.

Pick a schema type from the dropdown, fill out the form, and Merkle outputs valid JSON-LD ready to paste into your page. Click the “G” icon to send the code straight to Google’s Rich Results Test, which validates eligibility for rich snippets in real time.

22. View Rendered Source

See the raw HTML versus the version that JavaScript rendered.

This Chrome extension is the right tool for any site built on a JavaScript framework like React, Vue, or Next.js. It compares the original HTML returned by your server with the version that JavaScript renders in the browser, side by side. If your important content lives only in the rendered column, you have a crawlability problem worth fixing before it eats your rankings in both Google and AI search.

23. XML Sitemap Generator

Build a sitemap for sites without one.

Most CMSs generate sitemaps automatically. If yours does not, this tool crawls your site and produces a clean XML sitemap you can submit to Google Search Console and Bing Webmaster Tools. The free version covers up to 500 URLs per sitemap.

Site speed and health

24. PageSpeed Insights

Audit your page for Core Web Vitals.

Built by Google, PageSpeed Insights returns a performance score along with the three Core Web Vitals that influence rankings, namely Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift. Each issue is paired with a one-line explanation and a fix. Run it against your top ten organic landing pages and you have a quarter’s worth of technical work mapped out.

25. Cloudflare

Free CDN that speeds up your site and protects it from attacks.

Cloudflare caches your site across a global network so visitors load it from a server close to them. The free plan also includes basic DDoS protection and a free SSL certificate, which is a small Google ranking factor and an absolute requirement for AI search engines that often skip insecure sources.

26. ShortPixel

Compress images without losing visible quality.

Image weight is the most common cause of slow pages on content sites. ShortPixel compresses, resizes, and converts images to next-generation formats like WebP, in bulk. The free tier handles 100 images a month, which is enough for a single audit pass on a small blog.

Link building and domain authority

27. Analyze AI Website Authority Checker

Check the domain authority of any site.

Authority scores estimate how strong a site’s backlink profile is on a 0 to 100 scale. Use the Website Authority Checker to qualify guest post targets, vet link prospects, and benchmark yourself against direct competitors. Treat the absolute number as directional. The relative comparison between you and a peer site is what actually informs strategy.

28. Analyze AI Broken Link Checker

Find broken links on any page or domain.

Broken links cost you in two ways. They drain link equity from your own pages, and they leak opportunities on other sites. The Broken Link Checker scans any URL and returns every dead outbound link, which is the raw input for broken link building. Find a relevant broken link, write the better replacement, then email the page owner. For more on link building generally, see our roundup of link building tools.

29. Hunter.io

Find professional email addresses for outreach.

Hunter pulls email addresses associated with any domain so you can find the right person for guest post pitches, broken link outreach, or PR. The free tier covers 25 searches a month. The bulk email finder is the underrated feature for anyone running outreach at scale.

30. Wayback Machine

See historical snapshots of any URL.

The Wayback Machine archives versions of pages over time. Two SEO use cases stand out, namely reverse engineering content that used to rank then dropped, and finding what was on a now-broken page so you can pitch a relevant replacement. The Changes view highlights when major rewrites happened, which is sometimes the moment a page lost its rankings.

Analytics and reporting

31. Google Analytics 4

Track what visitors do once they land on your site.

GA4 is free and required by anyone who wants to attribute traffic to revenue. The Acquisition report breaks traffic by channel, including the AI search channel that increasingly shows up labeled as referrals from chatgpt.com, perplexity.ai, gemini.google.com, and copilot.microsoft.com. Build a custom segment for AI search referrals to track that channel as a first-class citizen alongside organic and direct.

32. Looker Studio

Build dashboards that combine data from GSC, GA4, and other sources.

Looker Studio (formerly Data Studio) makes monthly reporting bearable. It connects to Google Search Console, GA4, Google Sheets, and most third party SEO tools through community connectors. Build a dashboard once, share a link, and the people who read your reports stop asking for updates. For more on reporting, see our list of SEO reporting tools.

33. Analyze AI Website Traffic Checker

Estimate organic traffic to any website.

You cannot install GA4 on a competitor’s site, but you can estimate their traffic. The Website Traffic Checker returns the estimated monthly organic visits to any domain along with the top countries and traffic sources. Use it to size up competitors and prospects before you invest in deeper research.

A bonus tool everyone forgets

34. Google search itself

The free SEO tool everyone forgets, hidden in plain sight.

Google search is the closest thing you have to a free competitor analysis tool. Search the keyword you want to rank for, and the SERP tells you what intent looks like, what formats Google rewards, what subtopics matter, and which brands you have to beat. Search operators turn it into a precision instrument. site:competitor.com "topic" finds every page they have published on a topic. intitle:"topic" inurl:blog finds guest posting opportunities. "topic" 2026 finds the recent coverage worth competing with.

Pulling these tools into a workflow

Tools do not produce results. Workflows do. The list above splits into three workflows that any DIY SEO can run on a free stack.

The keyword to draft workflow uses the Keyword Generator and Google Keyword Planner to source ideas, the Keyword Difficulty Checker to filter, AlsoAsked and Google Trends to shape the brief, and the SERP Checker to study the competition. Run it once and you have a quarter of editorial in pipeline.

The publish to rank workflow uses RankMath and Merkle for clean on-page SEO, the SERP Snippet Optimizer to pre-test how the page will look in results, PageSpeed Insights and Cloudflare to keep it fast, and the XML Sitemap Generator and Google Search Console to make sure it gets indexed.

The AI search workflow is newer and the one most teams are missing entirely. Use ChatGPT and Perplexity manually to read your category. Use the AI Search Explorer for structured prompt checks. Use Prompt Discovery and the Free AI Website Audit to find what to fix. Pair these with GA4 segmentation to attribute AI referrals to revenue, and you have a closed loop from prompt to pipeline.

For the deeper guides on the AI search side, see How to rank on ChatGPT and How to rank on Perplexity. For how the two channels overlap and where they diverge, our GEO vs SEO breakdown walks through it. To see how all of this fits into a 2026 plan, our SEO content strategy guide ties it together.

Free tools have a ceiling. They will get you to working keyword research, a clean technical site, and a baseline read on AI search visibility. After that, the bottleneck stops being tools and starts being the writing, the linking, and the patience to compound. Free is enough to get there.