Free Keyword Research Tool

Bulk suggest keywords, query fan-out, heading structure analysis, and co-occurrence extraction. For content creation and SEO strategy.

SuggestBulk fetch related keywords
Fan-outGenerate AI search sub-queries
Ranked KWCheck your ranked keywords
Competitor KWResearch competitor ranked KW
Heading ExtractVisualize URL heading structure
Co-occurrenceCompare co-occurrence across URLs

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What Is Keyword Research?

Keyword research is the process of finding the actual keywords people search for in search engines, and applying them to your SEO strategy and content. CodeQuest.work SEO lets you do bulk Google Suggest extraction, competitor heading structure analysis, co-occurrence word extraction, and query fan-out — all on one page. Suggest extraction is available with just a free account, requires no installation, and returns results instantly in your browser.

4 Things You Can Do with This Keyword Research Tool

Run the core keyword research workflows needed to drive SEO results, simply by entering a URL or keyword.

Bulk Google Suggest

Pull Google's auto-complete suggestions in bulk. Discover keywords grounded in real user search behavior and use them for content planning and long-tail SEO.

Competitor Heading Analysis

Show the H1–H6 heading structure of any competitor page as a tree. Reverse-engineer the structure of top-ranking articles and apply it to your own outline.

Co-occurrence Word Extraction

Extract frequently used words from a target URL. Discover the vocabulary that comprehensive content needs and fill gaps in your own pages.

Query Fan-out

Generate the follow-up questions that AI search engines (ChatGPT, Perplexity, Gemini) ask next. Critical for AIO/GEO — get ahead of the next question.

Why Keyword Research Matters for SEO

Writing content without keyword research is writing for demand that doesn't exist. Even if you rank for keywords with zero search volume, no traffic will follow. Designing content around words people actually search — discovered through Google Suggest and competitor analysis — is a prerequisite for SEO success.

By analyzing competitor heading structures and co-occurrence words, you can reverse-engineer what Google deems necessary for a topic. This improves content comprehensiveness and lets you build articles that match search intent in depth. In the AI-search era, query fan-out coverage is becoming a new ranking factor.

How to do keyword research (4 steps)

Keyword research starts not from words you happen to think of, but from words people actually search. The following four steps build the foundation for content that answers real search intent.

  1. 1

    Bulk-collect suggest keywords to surface candidates

    Enter a seed keyword and bulk-collect Google Suggest (autocomplete) candidates. Because these reflect what users actually search for, you gather keywords with real demand efficiently.

  2. 2

    Classify keywords by search intent

    Sort the collected keywords by intent — informational, comparison, how-to, and so on. Even within one theme, different intents call for different content.

  3. 3

    Check coverage with competitor headings & co-occurrence

    Analyze the H1–H6 headings and frequently used words (co-occurrence) of top-ranking pages for your target keyword to find topics your content is missing. This reverse-engineers what Google considers essential for the topic.

  4. 4

    Get ahead of follow-up questions with query fan-out

    Generate the follow-up questions AI search engines (ChatGPT, Perplexity, Gemini) are likely to ask next from your keyword, and cover them within a single page — a coverage tactic for the AIO/GEO era.

Suggest vs. co-occurrence vs. heading extraction vs. fan-out

This tool offers four keyword research features. Each differs in what it reveals and when to use it.

FeatureWhat it revealsWhen to use
Bulk Google SuggestRelated keywords people actually searchSurfacing article themes and long-tail candidates
Co-occurrence extractionWords that appear often on top-ranking pagesChecking topical coverage and finding missing terms
Heading extractionThe H1–H6 structure of competitor pagesReference for article structure and heading design
Query fan-outFollow-up questions AI search may askAIO/GEO optimisation and FAQ design

How much keyword research you can do for free

Bulk Google Suggest collection is available up to 5 times per day with just a free account — no installation required, and results appear instantly in your browser. Heading extraction, co-occurrence extraction, and query fan-out require the Entry plan or above.

An honest note: The tool only collects candidates. The final call on which keyword to write for and which intent to serve must be made by a human who understands the target reader. Rather than stuffing in suggest keywords and co-occurrence terms as-is, weaving them into content that solves the reader's problem is the prerequisite for being valued in both SEO and AI search.

Try All Features Free

Start Keyword Research Now

Free account: up to 5 suggest searches per day. Heading extraction and co-occurrence analysis are available on Entry plan and above.

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FAQ

What are suggest keywords?
Suggest keywords are the auto-complete suggestions that appear when you type in Google's search box. They are generated based on actual user search behavior, making them valuable for discovering keywords with real demand.
How do I use suggest keywords for SEO?
Use suggest keywords to understand user search intent and incorporate them into your content topics and headings. Covering related keywords comprehensively can increase traffic from long-tail keywords.
How many keyword searches can I perform?
Suggest keywords: Free 5/day, Entry 500/month, Basic 1,000/month, Pro 3,000/month. Heading extraction and co-occurrence analysis require Entry plan or above (Entry 30/month, Basic 100/month, Pro unlimited). Counted separately from SEO checks.
What is the heading extraction feature?
Just enter a URL to display its H1-H6 heading structure in a tree view. Analyze competitor heading structures to improve your own content outline. Proper heading hierarchy is essential for SEO.
What is the co-occurrence word extraction feature?
This feature extracts frequently used words from a specified URL and displays them by occurrence count. Discover keywords commonly used on competitor pages and identify related terms missing from your own content. It helps improve topical coverage for SEO.