Install the RankParse extension on Chrome, Edge, or Firefox to inspect on-page SEO and pull domain metrics for any page.

The RankParse browser extension brings on-page SEO inspection and on-demand domain metrics into your browser. It runs on Chrome, Microsoft Edge, and Firefox from a single codebase.

Install

Chrome Web Store: RankParse SEO Toolkit
Microsoft Edge Add-ons: see extension landing page
Firefox Add-ons (AMO): RankParse SEO Toolkit

All store links are listed on the extension landing page.

Connect your API key

DOM-only features work without an account. To unlock domain metrics and SERP overlays:

Open your API keys page and copy a key (the rp_… token).
Click the RankParse icon in your browser toolbar → Options.
Paste the key and save.

The key is stored in your browser's local extension storage. It is only ever sent to api.rankparse.com for authentication.

What it does

Free features (always on, no credits)

Title, meta description, canonical, Open Graph, Twitter Card, robots
JSON-LD and microdata schema
Heading outline (H1/H2/H3 counts and contents)
All page links classified by rel (dofollow, nofollow, UGC, sponsored)
Images, alt text coverage, internal vs. external link counts

All of this is computed locally from the page DOM. No network requests are made.

Domain metrics (on demand)

Domain authority + popularity rank: 1 credit (/v1/domain-authority)
Top backlinks for the current domain: 2 credits (/v1/backlinks)
Referring domains: 2 credits
Anchor text distribution: 2 credits
Tech stack: 2 credits

See credits for the full pricing table.

On Google search result pages, the extension can render an authority score next to each result. The toggle defaults to off; flip it on in Options if you want it. Each result row costs 1 credit per domain.

Privacy

No browsing history is collected.
Page content is read locally and never transmitted.
Domain lookups send only the domain name (e.g. stripe.com) to api.rankparse.com. Full URLs are never sent.
The SERP content script only activates on google.com results pages.

Full details are on the privacy page.

Permissions

The extension requests:

Active tab, to read the DOM of the page you're currently viewing.
Storage, to save your API key and cache domain lookups for 24 hours.
Host permissions for *.google.com, only for the SERP overlay; revoke at any time in browser settings.

Source

The extension source lives in rankparse-ext/, built with WXT, TypeScript, React, and Tailwind. Pull requests welcome.

Browser Extension