Reports & Analysis · Runs in your browser · Free
SEO Content Gap Planner
Compare your topics with a competitor's and list the subjects you have not covered yet.
What this tool does
Matches two topic lists after removing filler words and plural endings, and returns gaps, overlaps and topics only you cover.
Who should use it
Content planners looking for missing sections, FAQs and guides.
How it works
Each line is reduced to its meaningful words (stop words removed, simple plural stripping). A competitor topic counts as covered if all its words appear in one of your lines or the word overlap (Jaccard) is at least 60%.
How to use it
- Enter or paste your topics or headings in the form.
- Adjust the options below the main box if you need to; the defaults suit most cases. Use "Load example" to see how input should look.
- Press the run button. Processing happens instantly in your browser.
- Review the result panel, then copy or download the output if the tool offers it. Use Reset to start over.
Practical example
"How to submit a sitemap to Google" is a gap if none of your lines contain sitemap, submit and google.
Understanding the results
Gaps are prompts for research, not instructions to copy.
Limitations
It cannot judge demand, intent, quality or whether competitor content ranks. Wording differences can create false gaps.
Accuracy and report transparency
Results are computed in your browser from exactly what you enter. Deterministic steps (counting, parsing, encoding, validation) are verified by an automated test-suite with known answers. Where a method is a heuristic, the result panel says "estimated". No external data is used and nothing is invented.
Privacy
Your input never leaves your device for this tool. We count anonymous events (tool opened, run, copied) without storing what you typed. See the Privacy Policy.
Frequently asked questions
Where do I get the lists?
Copy headings from your pages and from competitor pages you are allowed to read, or use the URL Heading Checker output.
Is my data sent to your server?
No. This tool runs entirely in your browser, so the text or files you enter stay on your device. We do record anonymous counts of how often each tool is opened or run (no input data) to see which tools are useful.
How accurate are the results?
Counting, parsing, encoding and validation steps are deterministic and covered by automated tests with known answers. Anything based on a heuristic is labelled "estimated" in the result panel.
Is this tool really free?
Yes. There is no account, limit or paid plan. The site is supported by advertising, which is disclosed on our Advertising Disclosure page.