An on-page SEO checker for the page you're already on

Six things, each in its own tab: Insights, Meta, Headers, Images, Links and Schema. That covers Lighthouse scores and Core Web Vitals, meta and social tags, the H1 to H6 outline, image weight and alt text, every link on the page and structured data. It runs on whichever page you have open, including pages behind a login that a crawler can't reach.

Google's PageSpeed Insights API for the lab scores, and the Chrome UX Report for field data from real Chrome users. You get Performance, Accessibility, Best Practices and SEO, with separate mobile and desktop results. Both of those sources need a publicly reachable URL, so the Insights tab is the one part of the audit that can't run on a staging site.

Yes. It lists every internal and external link on the page, filters by type including no-follow, and checks status codes with a real request so a 404 shows up as a 404. Anchor text is listed next to each link, which is where thin, generic wording usually shows up. The status check leaves out anything that looks like an action rather than a page, such as wp-admin, logout, delete or remove URLs, so auditing while logged in never fires a request that changes something.

It detects JSON-LD, Microdata and RDFa already on the page and validates what it finds. Validation goes further than checking the JSON parses: it looks at @context and @type, the fields each type requires (a Product needs a name, an Article a headline), and walks an @graph block item by item. Microdata and RDFa get their own checks. If there's nothing there, you can generate markup from 21 templates covering Organization, Product, FAQ, Article, Recipe, Event, Breadcrumb and more.

Yes. The export dialog offers Markdown, PDF, JSON, CSV and plain text. Markdown is the default and goes to the clipboard, ready to paste into a ticket or a chat; the PDF is the one to send a client. Every section marks what's passing and what needs work, so it reads as a to-do list rather than a data dump. If image sizes or link checks are still running, the dialog waits for them, and it warns you if you never ran the link check at all. You can also copy just the meta tags, headings or schema to your clipboard.

Yes. Every tool runs in the Firefox build, and the same license covers it. Chrome, Edge, Brave and other Chromium browsers are supported too.

The SEO panel comes with Hoverify, a paid extension with a 14-day refund behind it. A couple of real audits will tell you whether it stays, and you can get your money back if it doesn't. That stands in for a trial. One license runs in 3 browsers at a time, and nothing auto-renews. See the pricing.