How to do keyword research with free AI tools in 2026

Most people starting an affiliate blog waste their first six months writing content that nobody searches for. Not because the content is bad — because they picked keywords by instinct instead of by data. Keyword research is the single highest-leverage activity for early-stage affiliate content, and you can do it properly with tools that cost nothing.

Why keyword research matters more than content quality at the start

A 2,000-word post that targets a specific, low-competition search query will outperform a brilliant 4,000-word post that targets no specific query — every time. Search engines are matching intent to content. If your content does not match a specific search intent that people are actually typing, it does not matter how good it is. It will not rank, because it was never in competition for anything specific.

The goal of keyword research for a new site is to find queries where the intent is clear, the competition is weak, and the traffic is buyer-driven or at minimum curiosity-driven. You are looking for the gap between what people search and what currently exists.

The free tool stack for keyword research in 2026

You need four things, all of them free:

• ChatGPT (free tier): for generating keyword ideas, identifying subtopics, and clustering related terms
• Google Search (no login required): for manual competition assessment and finding autocomplete suggestions
• Google Search Console (free with a verified site): for discovering what your existing pages already rank for and finding expansion opportunities
• Perplexity (free tier): for understanding what kind of content currently ranks for a query and assessing the quality of existing results

If you have not verified your site in Google Search Console yet, do it now. It takes 15 minutes and you will have it for life. Every day your site runs without Search Console connected is data you will never recover.

Step 1: build a seed keyword list with ChatGPT

Start by giving ChatGPT a clear prompt about your niche. The prompt that works best:

"I run an affiliate marketing blog in the [niche] space. My audience is [describe them]. Generate 30 specific, question-based search queries that a beginner would search when trying to solve [specific problem]. Focus on long-tail queries (4+ words) that have clear commercial or informational intent. Avoid generic terms like 'best tools' — I want specific phrases people actually type."

Run this prompt 3–5 times with slight variations. You will get 90–150 candidate keywords. Do not filter yet — collect everything.

Then ask ChatGPT to cluster the list: "Group these keywords by topic cluster — keywords covering the same underlying intent should be in the same group." This gives you a content map, not just a list. You will see which clusters have multiple keywords (meaning sustained content opportunities) and which are isolated one-offs.

Step 2: check Google autocomplete for real demand signals

ChatGPT generates plausible keywords — it does not confirm real search demand. For each candidate keyword, type the first 3–4 words into Google (do not press Enter yet) and watch the autocomplete suggestions. Autocomplete shows you what people are actually searching. If your keyword appears in autocomplete or close variations appear, it has real search demand. If nothing close appears, the keyword may be something ChatGPT invented that nobody types.

Also check the "People also ask" section and the "Related searches" at the bottom of the SERP. Both are Google telling you exactly what other queries people ask around the topic. These often contain your best low-competition opportunities.

Step 3: assess competition manually

Search your candidate keyword in Google. Look at the top 5 results. Ask:

• Are any of the top results Reddit, Quora, or forum posts? That is a strong signal that no authoritative site has specifically targeted this query.
• Are the top results from large generic sites (Forbes, Shopify, HubSpot) that published a broad article mentioning this topic but not fully dedicated to it? You can often outrank these with a specific, comprehensive post.
• Are the top results 3+ years old and not updated? Freshness matters for informational queries in fast-moving niches.
• Do the titles of the top results actually match the query, or are they vaguely related? A mismatch means Google has not found a great answer yet.

Use Perplexity to get a faster read on competition: paste your keyword into Perplexity and look at what sources it cites. If Perplexity's answer is pulling from Reddit and random blogs rather than established authorities, the content gap is real.

Step 4: prioritise buyer-intent keywords

Not all keywords drive affiliate revenue equally. Rank your candidates by intent:

• Highest priority — commercial investigation: "best [tool] for [use case]", "[tool] alternatives", "[tool] review", "is [tool] worth it", "how much does [tool] cost". People searching these are actively evaluating a purchase.
• Medium priority — informational with clear next step: "how to [do thing] with [tool]", "how to start [thing] with no money", "what is [concept] and how does it work". These build audience trust and often convert once you have affiliate links naturally in the post.
• Lower priority — pure curiosity: "what is [topic]", "[topic] explained". Fine for building topical authority, but expect low direct conversion.

If you are early-stage with a new site and limited publishing bandwidth: focus 70% of your posts on commercial investigation and how-to content. Save the pure informational posts for once you have a content base established.

Step 5: use Google Search Console to find existing opportunities

Once your site has been live for 4+ weeks, Search Console becomes your most valuable free keyword tool. Go to Performance → Search results. Look at queries where your average position is between 8 and 25. These are pages close to page 1 that a targeted improvement could push into the top 5.

For each near-miss page, check what exact query is driving impressions. Update the post to more specifically address that query: add it to the title, expand the section that covers it, and add 2–3 paragraphs of deeper information. Then resubmit the URL for indexing via the URL Inspection tool. Many creators see positions jump 5–10 spots within 2–3 weeks from this approach alone.

The one mistake that kills early keyword research

Targeting keywords that are too broad. "Make money online" is not a keyword — it is a category. "How to make money online in 2026" is still too broad. "How to make money online with no experience and no investment in 2026" is specific enough to target. "How to earn your first $100 with ClickBank as a complete beginner" is better still. The more specific the query, the clearer the intent, the easier to rank, and the more pre-qualified the visitor.

Putting it all together: the 30-minute keyword research session

1. Minutes 0–10: Give ChatGPT your niche context and generate 30 long-tail candidate keywords. Ask it to cluster them by topic.
2. Minutes 10–20: Check the top 2–3 clusters in Google. Run autocomplete checks, look at SERPs, note which ones have weak competition.
3. Minutes 20–30: Check Search Console for near-miss opportunities on existing posts. Identify 1 post to update and 1 new keyword to target.

Do this once per week. After 12 weeks you will have a 12-post content roadmap, all of it targeted at real search demand, with a clear sense of which existing posts are close to ranking and need a push. That is enough structure to generate consistent organic traffic without spending a single dollar on SEO tools.

Frequently asked questions