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Zinn® SEO
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Free for WordPress, with a Pro edition

WordPress SEO plugin: get your site professionally SEO optimised for search engines, and keep it fast

Zinn® SEO is the WordPress SEO plugin built by an SEO professional. It sets your site up properly for Google, Bing and AI answers from day one, and it loads nothing on the pages your visitors see: no scripts, no stylesheets and no plugin name in your code. Titles, sitemaps, structured data, redirects, content checks and internal links, in one plugin.

The Zinn® SEO Fix it screen in WordPress: one prioritised list of what to fix across the site

No bloat. Your pages stay as fast as they are today.

Zinn® SEO adds only what search engines read. No scripts, no stylesheets, and it never writes its own name into your pages. Here is what it adds to a visitor's page, checked on October 9, 2026.

scripts added to your pages
0
stylesheets added to your pages
0
plugin comments in your page code
0
extra database lookup per page, at most
1

See the proof

Everything your SEO needs, in one plugin

No add-ons to bolt together and no second plugin for redirects or AI. It is all here, in your language, on phone and desktop.

Look right in search results

Set your titles and descriptions once with templates, see exactly how each page will appear in Google, and change any page on its own.

Get found, and stay found

Sitemaps that never slow your site, new pages sent to Bing and other search engines the moment you publish, and redirects that stop visitors hitting dead pages.

Show up in AI answers

Give ChatGPT, Claude and Perplexity a clear map of your site, decide which AI crawlers may read it, and add short answers they can quote.

Earn rich results

Help Google show breadcrumbs, product details and more under your result, with structured data that is checked for mistakes before Google sees it.

Write pages that rank

Live advice while you write, in any language, plus links to your own related pages suggested for you and added in one click.

Know what to fix first

One list for the whole site, most important first, with a time estimate for each job and one-click fixes for the simple ones.

See every Free and Pro feature

A million posts, and your sitemap still loads

On a big site a sitemap can time out, and then search engines stop seeing your new pages. Zinn® SEO prepares your sitemap in the background, so it loads instantly however large your site is. On a test site with a million posts it listed 1,000,005 pages in 142 seconds.

SEO for large WordPress sites

The Sitemaps tab: addresses, files, last full build, build time and memory used
The AI crawlers tab, with crawlers grouped into AI search and answers, fetching for a person, and training AI models

You decide which AI reads your site

Want to be quoted in AI answers but not used to train AI models? One click does it. Every AI crawler is explained in plain words, so you know what you are allowing.

How to choose which AI crawlers read your site

Write in Google Docs™, publish from WordPress

Write where your team already writes. The Zinn® SEO add-on for Google Docs™ checks your SEO and readability as you type, then sends the document to WordPress as a draft. Nothing goes live until you publish it.

Available as a Google Docs™ add-on with Zinn® SEO Pro.

Write in Google Docs™ and send it to WordPress

Works with the tools you already use

Zinn® SEO is made to work hand in hand with our own plugins and with the builders and shop most WordPress sites run on.

Tranzly

Every language of your site gets its own sitemap and its own guide for AI assistants, so each one is found.

Page Builder Sandwich

Add the SEO blocks straight from the builder and get writing advice on the page exactly as you built it.

Elementor

An SEO section inside Elementor with a live search preview, plus the SEO blocks as widgets.

WooCommerce

The right products in your sitemap, product details Google can read, and no dead links when a product goes.

WooCommerce, marketplaces, translation plugins, page builders, courses, memberships, forums, events and more: 74 plugins, each with its own part that loads only when that plugin is active.

See every integration

Made by someone who ranks sites for a living

Zinn® SEO is built by Neil Lock, an SEO professional with more than 25 years of experience who has ranked thousands of sites on page one. It does what actually moves rankings, and leaves out what only slows a site down.

Meet the person behind Zinn® SEO

Thinking of switching?

See how Zinn® SEO compares with Yoast SEO, Rank Math, All in One SEO, SEOPress, The SEO Framework, Slim SEO, Squirrly SEO and SmartCrawl. Every fact about them links to the page it came from, with the date we checked it.

Compare SEO plugins

Frequently asked questions

Will Zinn® SEO slow my site down?

No. That is the whole point. It adds 0 scripts, 0 stylesheets and no plugin comment to your visitors' pages, so your site is as fast with it as without it.

I already use another SEO plugin. Can I try this next to it?

Yes. While your other SEO plugin is switched on, Zinn® SEO stays out of its way so nothing is doubled up. Once you are happy, keep just one.

My site is huge. Will the sitemap cope?

Yes. Your sitemap is prepared in the background and loads instantly. On a test site with a million posts it was ready in 142 seconds using 115.9 MB of memory.

Should I block AI crawlers?

It depends which ones. Block the crawlers that answer questions and you vanish from AI answers that would have linked to you. Block the ones that only train AI models and you lose nothing. Zinn® SEO sets that up in one click.

Is my content sent anywhere?

No. The writing checks in the free plugin all run on your own site. Two optional Pro features reach outside, and only when you use them: one reads competitor pages you name, the other uses the AI service you connect with your own key.

Will it work with my WordPress?

Yes, if you run WordPress 6.4 or newer on PHP 7.4 to 8.5.

Do I need Pro?

Most sites do not. Pro adds unlimited focus phrases, a history of every SEO change, more rich result types, automatic links, a broken link checker, video and news sitemaps and spreadsheet editing, from $49 a year.

What if I stop using it?

Delete the plugin and everything it added is removed. If you would rather keep your SEO details, tick Keep my SEO data if the plugin is deleted under Settings, Data first.

Can I copy my settings to another site?

Yes, for free. Export your settings to one file and import it on another site: titles, structured data, sitemaps, robots rules, sharing, breadcrumbs and which features are on all come over, and the site's own address is put in for you. You see every change before anything is applied, and a file with one value that is not allowed is refused whole. Keys and connections never leave the site.

How does the content optimiser compare with Surfer or Clearscope?

It does the same job inside WordPress, for a fraction of the price: as you write, it scores how well your post covers the words, names, questions and headings of the 10 pages that rank for your phrase, and lists what to add and what you overuse. There is no monthly plan: the plugin is free, and reading the top 10 for a phrase costs $0.05 once, from your Zinn® account balance, then is kept for every post that targets it. It works in 58 languages, in the block editor, the classic editor, Elementor and other page builders.

Can Zinn® SEO add FAQ structured data to all my posts at once?

Yes, for free. In Structured data, Fill with AI, the AI writes an FAQ, how-to steps, product details or an article summary from each page's own text, for every page that has none, a few pages per request. You see the cost first (measured on our own account: about $0.06–$0.16 per 100 pages for FAQs), review every one with its check against schema.org and Google's rules, and undo a whole batch in one click. The FAQ shows on the page under its text, as Google requires. Google stopped showing FAQ rich results in May 2026, but Bing and AI assistants still read FAQ structured data. Pages with an FAQ of their own are left alone and cost nothing.

Can Zinn® SEO clean up malware and fix errors on my site?

Yes, with Pro. Site care checks every file against the official copies and your accounts, settings and pages for malware and spam, reads your error logs and explains each error with the fix, and cleans up the database safely. Every change is backed up first, nothing is deleted and everything can be undone in one click. The AI only sees your code with your secrets removed, and a code fix is switched on only after you approve it and it passes a test.

Can Zinn® SEO fix every issue on my site in one go?

Yes, with Pro: Fix it on autopilot fixes the whole Fix it list in one run, across the whole site or one section. It writes the missing meta descriptions, gives pages that share a title their own, writes alt text, fills in structured data, plans the internal links and runs the one-click fixes. You see what it will change and what it costs first, approve it all or one by one, every change keeps the value it replaced, and a whole run undoes in one click. It can run weekly and e-mail you a summary. Yoast SEO Premium, Rank Math and All in One SEO offer bulk AI titles and descriptions (Rank Math also bulk alt text) from their own post lists; their pages describe no run over the whole issue list and no one-click undo of a run.

Can Zinn® SEO fix internal links that go through redirects or point at deleted pages?

Yes, with Pro: Fix every internal link reads every page and fixes, in one run you review first, the links that hop through a redirect or a chain, land on a missing, trashed, unpublished or hidden page, or point at the wrong language. Redirected links go straight to the live page, wrong-language links to the translation, and for a page that is gone the AI proposes the closest page by meaning. Each page changed keeps a revision and the whole run undoes in one click. By their own pages (read 2026-10-16), Link Whisper Premium's error report finds broken links and its link changer swaps one address for another across the site, and All in One SEO pairs its Link Assistant with a separate Broken Link Checker; neither describes fixing links that only go through a redirect or point at the wrong language.

Can I see and change every link to other sites?

Yes, in Pro. Links, Outbound links lists every site your pages link to with the links, pages, words and link type, checks whether each site is still live, and flags spam or expired domains. Change or remove one link where it is, or every link to a site at once: you review it first, each page keeps a revision, and a whole change undoes in one click.

Can Zinn® SEO stop a plugin update from breaking my site?

Yes, with Zinn® SEO Pro. Safe updates tries each plugin, theme and WordPress update on a copy of your site that visitors never see, reads your key pages, forms, checkout and signed-in screens with both versions, and installs it only when nothing breaks. The version before is kept, and if your site breaks after an update it is put back by itself. The AI explains any problem in plain words and can write a small fix for you to approve.

How is the AI copywriter better than Rank Math Content AI?

It has 76 writing tools (all of Rank Math's and 31 more) and 155 prompts, writes from your page's focus phrase in 58 languages, and checks every version before you use it.

Is redirecting by country safe for SEO?

Zinn® SEO never redirects search engines by country and never lets page caches keep those pages. Google still prefers one page per language with hreflang where you can.

From the same team

Want fast hosting to go with it?

Zinn Digital® hosts WordPress on its own servers, with a CDN, DNS, TLS and daily backups included in every plan.

For Zinn Digital® hosting customers

50% off Zinn® SEO Pro when you host with us

Hosting customers get a personal code for 50% off their first payment of every Zinn® Pro plugin, straight from their dashboard.