Free Content Gap Tool

Content Gap Checker

Spot missing topics, FAQs, and internal-link opportunities for your site

How it works

No black box. Here's exactly what Content Gap Checker checks.

  1. 1

    You enter two URLs (or one + a topic)

    Yours and a competitor's, or yours and a topic seed. Both modes work — the URL-vs-URL mode is more precise.

  2. 2

    We extract headings + topic signals

    H1/H2/H3 from each page, key bigrams, FAQ-style questions. We don't need to scrape body text — headings carry most of the signal.

  3. 3

    We diff the topic coverage

    Topics in their headings that don't appear in yours land in the gap list. Repeated topic clusters are flagged separately.

  4. 4

    You get an action plan

    A short list of subtopics to add, FAQ questions to answer, and internal-link opportunities. Prioritized by impact.

Why this matters

Topic gaps are the single biggest reason "good" content underperforms. You wrote a 2000-word article on a keyword, the top result wrote 2000 words on the same keyword, but theirs covers eight subtopics yours doesn't — Google reads that as "more comprehensive" and ranks them. The fix is rarely "write a new article." It's "add three sections to the one you have."

  • Topical comprehensiveness is now a stronger ranking signal than backlink count for many query types.
  • AI engines (ChatGPT, AIO) cite the page that answers the most subquestions, not the page with the highest authority.
  • A 200-word section that answers a missing FAQ often unlocks featured snippet eligibility — same page, same effort, different SERP visibility.
  • Adding to existing pages compounds: every new section also acts as a long-tail keyword target.

Want the full story across every page?

The Content Gap Checker checks one URL. CrawlTide audits your whole site, tracks issues over time, watches your AI Visibility weekly, and pushes meta-tag fixes straight to your CMS.

Run a full audit freeSee all features

No credit card. Free tier covers a small site end-to-end.

Frequently asked questions

How do you find the gaps without scraping the whole page?
Heading structure (H1/H2/H3) is intentionally a high-signal-to-noise representation of what a page covers — that's why writers and SEOs spend so much time on it. We compare the heading sets and the bigram frequency between the two pages. It's 80% as accurate as full-text analysis at 5% of the cost.
When should I expand vs spin out a new article?
If your page is under 1500 words and the gaps are subtopics of the same parent topic, expand in place. If your page is already 2500+ words and the gaps are distinct topics, spin them into linked sub-articles. Crawlable internal-link networks usually beat one giant page.
Can I compare against multiple competitors at once?
Not in the free tool. CrawlTide's Content Studio compares against all your tracked competitors at once and weights gaps by aggregate competitor coverage — a topic that 4 of 5 competitors cover is a stronger gap signal than one that just one covers.
My competitor's page is JS-rendered. Will this still work?
For v1 we read the initial HTML response only. If a page renders most of its content after JS execution, we won't see it. CrawlTide's full crawler uses Puppeteer for JS-rendered sites — that's a paid tier feature.
Does this work for non-blog content?
Yes — product pages, landing pages, documentation, knowledge base articles. As long as both pages have meaningful heading structure, the diff is useful. For pages that are mostly forms or images with little text, the signal is weak.

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