SEO and marketing extensions are where the SaaS pricing model has gotten most aggressive — and most absurd. A simple on-page SEO checker that runs in your browser, takes 200 lines of code, and uses no external infrastructure can cost $39–99/month as a subscription per tool. With PlugThis you build as many of them as your plan allows from $29/month — and you own the code, so you keep what you build even if you cancel.
This category covers the full marketing browser stack: on-page SEO auditors (title length, meta description, heading hierarchy, image alt text, schema), keyword research helpers (extract keywords from SERPs, pull related questions, scrape competitor pages), SERP analyzers (rank tracking for specific queries, competitor visibility), and marketing-adjacent tools (UTM builders, social preview generators, schema markup creators).
The pitch for building your own here is sharper than other categories: you know exactly what data you need on each page audit, you know your client list, you know your competitors. A custom extension shows precisely those things and skips the upsells and noise that paid tools include to justify subscriptions.
More seo & marketing extensions coming soon.
Title/meta checkers, heading hierarchy, schema validators, image alt audits
SERP extractors, related questions, keyword extractors from competitor pages
Single-query rank checkers, SERP feature monitors, position trackers
Word counters, readability checkers, schema generators, UTM builders
Not fully — those tools rely on massive backend crawl databases that you can't replicate. But for the in-browser tasks (page audits, SERP inspection, on-page checks, schema validation), a custom extension covers 80%+ of daily use. Most SEOs find they keep one paid tool for backend data and replace the rest with custom builds.
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Yes, via the Google Search Console API. PlugThis can wire OAuth, fetch the data, and display it in the extension. You'll need to set up a Google Cloud project with the GSC API enabled (one-time, free).
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No. SEO extensions analyze pages — they don't do anything that affects rankings. You're building an audit tool, not a manipulation tool.
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Yes, within reason. Chrome extensions run in the user's browser, which is allowed for personal use. Heavy SERP scraping at scale may trigger Google's rate limits regardless of how you do it — extensions don't bypass that.
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AI drafters, paraphrasers, grammar tools, and content helpers that work inside any text field on the web.
JSON formatters, regex testers, API inspectors, color pickers — the small utilities that compound across a workday.
Tab managers, focus tools, note capturers, and time trackers that make your browser work harder for you.
Describe what you want in one sentence. PlugThis generates a working Manifest V3 Chrome extension in under two minutes.
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