# Answer-capsule checker

_Source: https://seomatrix.ai/tools/answer-capsule/_

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## What it does

An answer capsule is a self-contained 40-75 word paragraph placed directly under a heading that fully answers that heading's question without leaning on the surrounding text. This checker scans your article and flags every H2/H3 whose opening paragraph fails that test. It matters because AI answer engines — ChatGPT, Perplexity, Google AI Overviews — lift these capsules almost verbatim and cite them, so headings without one get skipped in favor of a competitor's.

## What it checks

- **Self-contained opener** — The first paragraph under a heading answers that heading's question on its own, without pronouns that point back to earlier sections — because AI engines extract passages in isolation, not the whole page.
- **40-75 word length** — The capsule fits the passage window AI engines quote: much shorter usually omits the full answer, much longer gets truncated mid-thought before the point lands.
- **Answer-first sentence** — The opening sentence states the answer directly instead of a lead-in or background, so the extractable value is in the first line an engine reads.
- **Heading-to-answer match** — The capsule actually resolves the specific question the heading poses, rather than drifting into a related sub-topic that the heading never asked about.
- **No orphan references** — Bare pronouns like 'it', 'this', or 'they' that require the previous section break the passage when it is lifted alone, so the subject must be named in place.
- **Standalone definition** — A named subject defined in the first sentence lets the passage read correctly out of context, which is exactly how a citation surfaces inside an AI answer.

## How to use it

1. Paste your article's full text into the checker.
2. Review each flagged H2/H3 where the opener is missing, out of the 40-75 word band, or not self-contained.
3. Rewrite the flagged openers into answer-first 40-75 word capsules and re-run the check.

## FAQ

### What is an answer capsule?

An answer capsule is a self-contained 40-75 word paragraph placed right under a heading that fully answers that heading's question. AI engines lift it as a ready-made citation.

### Why exactly 40-75 words?

That band matches the passage window AI answer engines extract and quote — shorter openers tend to omit the complete answer, and longer ones get truncated before the key point lands.

### Does every heading really need one?

Yes. Every H2/H3 that poses a question or names a topic should open with a capsule, because AI engines index and cite at the passage and heading level rather than for the page as a whole.

### Will this help traditional SEO too?

Yes. Self-contained heading openers also win Google featured snippets and People Also Ask boxes, which reward the same extractable, answer-first structure that AI engines cite.