22 checks · no signup · free
Generative Engine Optimization (GEO) is the practice of structuring a web page so that AI answer engines can crawl it, understand it, and cite it as a source. Envoyix fetches any public URL, scores it across 22 checks in four categories, and tells you which fixes are worth the most points.
Public URLs only. A finished report is held in memory for sixty seconds so a refresh is instant, and is never written to disk.
This site’s own audit
envoyix.vercel.app
Envoyix is built as a worked example of its own advice, so it takes its own medicine: server-rendered on every route, structured throughout, and 97/100 against its own analyzer with every check passing.
Scoring
Every check returns a score from 0 to 100 and carries a weight reflecting how much it affects your chance of being cited. The overall score is the weighted average of all 22. Fixes are then sorted by recoverable points — each check’s weight multiplied by its gap to 100 — so the list arrives in the order actually worth working through, rather than in the order the checks happen to run.
01Crawlability
These checks read your robots.txt the way each AI crawler does, confirm the page returns a usable status code, and verify the content is present in the raw HTML rather than assembled by JavaScript after load.
02Structure
These checks look at whether the answer can be lifted out cleanly: heading hierarchy, question-shaped subheadings, paragraphs sized to chunk well, lists and tables, and an explicit FAQ block.
03Authority
These checks cover the signals an engine weighs before trusting a page — valid JSON-LD, a named author and publisher, publish and update dates, a canonical URL, and citations pointing at primary sources.
04Content
These checks grade the prose itself: whether the opening sentence answers the question, how readable the text is, whether it carries concrete figures, and whether individual sentences survive being quoted alone.
Context
SEO earns a position in a ranked list of links; GEO earns a sentence inside a generated answer. The two share crawlability and structure as a foundation and then diverge, mostly because an answer engine reads a page once and quotes from it, rather than ranking it against nine alternatives.
| Dimension | Classic SEO | GEO |
|---|---|---|
| What you compete for | A position in a ranked list of ten blue links. | The passage an assistant quotes inside one synthesised answer. |
| How the crawler reads you | Googlebot renders JavaScript before indexing. | Most AI crawlers read raw HTML only. Client-rendered content is invisible. |
| What moves the needle | Keywords and backlinks drive position. | Extractable structure, concrete figures and clear attribution drive citation. |
| What success looks like | A click. | Being named as the source, whether or not anyone clicks. |
Which crawler reads you matters as much as how. The rules live in RFC 9309, the standard behind robots.txt, and each vendor documents its own agents — OpenAI, for instance, publishes the behaviour of GPTBot and OAI-SearchBot separately, because one builds a training corpus and the other answers live questions.
Getting started
Paste any public URL. Envoyix fetches it the way a crawler does, scores it across every check, and returns the full report in a few seconds.
Run an audit →Findings arrive ranked by recoverable points, so the first three entries are the ones that will move your score the furthest for the least work.
How to fix them →Crawlability fixes show up the moment you deploy. Content and structure changes only land once the answer engines come back and re-crawl the page.
Read the FAQ →Questions
Generative Engine Optimization is the practice of structuring web content so that AI answer engines — ChatGPT, Perplexity, Claude, Gemini and Google AI Overviews — can crawl it, understand it, and cite it as a source. Where SEO competes for a position in a ranked list of links, GEO competes to be the passage quoted inside a single generated answer.
Each of the checks returns a score from 0 to 100 and carries a weight reflecting how much it affects your chance of being cited. The overall score is the weighted average of every check: the sum of score times weight, divided by the sum of weights. Category scores are the same calculation applied within each category.
No, and that is deliberate. Most AI crawlers read the raw HTML response without running JavaScript, so rendering the page first would give you a flattering score that does not reflect what those crawlers actually see. If your content only appears after a JavaScript bundle runs, Envoyix reports it as missing — because to an answer engine, it is.
References
No answer engine publishes its source-selection formula, so the weights here encode what is publicly documented plus reasonable inference, and every one is visible in the source of the check that uses it. These are the primary sources behind the parts that are documented.
The standard that defines how robots.txt is parsed and applied.
The vocabulary behind the JSON-LD this tool validates.
Reference for the indexing directives checked under crawlability.
The emerging convention scored as a bonus under crawlability.
OpenAI's own documentation of the crawlers named in the audit.