Case Study · Side Project · Live

SEO Champ — A Chrome Extension at 4.8★

A one-click SEO audit tool with structured data validation, broken-link checks, page-speed analysis, and SERP insights — live and publicly verifiable on the Chrome Web Store.

Role: Solo · Live on Chrome Web Store · Stack: JavaScript · HTML · CSS · Chrome Extension APIs

The popup surface — every audit on a single screen. Click the extension icon, get a verdict.

The Problem

SEO audits are tedious in the small. Open six tabs to check schema, run PageSpeed, paste the URL into a broken-link checker, eyeball the SERP. Every site I worked on, I'd repeat the same loop. The tool I wanted didn't exist as a browser extension — most of the good ones lived behind login walls or as paid SaaS.

The premise was simple: fold the whole loop into one button. Click the extension icon on any page, get the verdict.

The Solution

A Chrome extension that runs every check in parallel against the active tab and surfaces the results in a single popup. No accounts, no SaaS — the work happens locally where it can.

Structured data validation. Parses JSON-LD on the page and runs type-checks against the most common schema.org types.
Broken-link checks. Crawls outbound links from the visible page, reports any non-2xx responses with their status codes.
Page-speed analysis. Pulls Core Web Vitals from the live tab and optionally cross-references against the PageSpeed Insights API.
SERP insights. Quick visibility into how the page is likely being indexed — title, meta description, canonical, robots directives.

Tech Stack

JavaScript
HTML
CSS
Chrome Extension APIs

My Specific Contribution

Solo. Designed, built, and shipped the entire extension end-to-end — from manifest to listing copy.
UX. Single-popup surface with grouped results; no settings page, no tour, no account.
Privacy posture. No tracking, minimum-permission manifest, all checks happen against the active tab only.
Listing & reviews. Wrote the Chrome Web Store listing, screenshots, and ongoing user-review responses.

Impact

4.8★

Average user rating on the Chrome Web Store.

Public

Anyone can install it from the Chrome Web Store and verify the work.

Solo

Designed, built, and shipped end-to-end — no team, no agency.

Visuals

The Chrome Web Store listing — public install link and aggregated user reviews.

Audit panel running against a live page — results grouped by category, with copy-able findings.

Lessons

Shipping anything to a public store changes the constraints. Suddenly performance, permissions, and review responses matter as much as the code. The tightest discipline this project taught me wasn't engineering — it was scoping. Every feature I held back made the extension easier to recommend.