Technical Diagnostic
A focused review of affected routes, templates, deployment behaviour, crawl signals, CMS behaviour, performance bottlenecks, or code paths, followed by a prioritised fix plan the team can take into delivery.
Technical SEO and Indexing for JavaScript Applications and Modern Front Ends
This is for React and Next.js sites where Google is crawling pages but not indexing them, rendered HTML is too thin, or metadata and crawl signals no longer match what search engines need.
Engineering‑led SEO work for JavaScript sites where rendering, crawlability, metadata, or migration changes are keeping important pages out of search.
Short Answer
Your JavaScript‑based website may look fine in the browser, but search engines can still be seeing thin HTML, late links, unstable metadata, or confused canonical signals. I check whether important JavaScript pages can be discovered, rendered, understood, and indexed through crawl analysis, indexation debugging, rendered HTML checks, JavaScript SEO review, Core Web Vitals investigation, structured data validation, canonical signal checks, metadata fixes, and internal link analysis, then turn the findings into engineering fixes rather than a detached SEO report.
Why It Matters
When commercial performance depends on indexable JavaScript pages, I focus on the rendering, crawl, metadata, and migration decisions that protect search visibility and revenue.
Where This Fits
- Rendering, crawlability, metadata, canonical, and sitemap diagnostics.
- SEO risk review during platform migrations and redesigns.
- Engineering changes that preserve discoverability after launch.
What I Look at First
The first pass compares rendered HTML, indexable content, metadata, canonicals, internal links, sitemap and robots signals, crawl behaviour, Search Console data, and recent releases.
Common Engagements
- Technical audits before a migration or rebuild.
- Post‑launch recovery when traffic drops, pages disappear from Google, or indexation stalls.
- Hands‑on debugging with the existing engineering team.
What Usually Changes
- Rendering, crawlability, metadata, canonical, sitemap, and schema faults are separated into fixable engineering concerns.
- Affected routes, templates, content signals, and internal links are identified before changes are made.
- Fixes are prioritised by search exposure, implementation risk, and release effort.
- The team gets engineering‑ready actions rather than a detached audit deck.
- Recovery or migration risk is reduced without promising rankings or traffic.
How This Usually Works
Recovery Sprint
A short, concentrated engagement for a defined technical SEO, performance, CMS, Vercel, migration, or production issue where the business needs the cause isolated and the first fixes moved quickly.
Embedded Delivery Support
Senior hands‑on support inside an existing team where architecture, implementation, review, and delivery judgement all matter, especially when the work cannot be handed over as isolated tickets.
This May Not Be the Right Fit If
- You only need generic SEO content writing, keyword reporting, or a crawl export without engineering changes behind it. If search visibility is already damaged, Technical SEO Recovery and Debugging is the better route.
- There is no appetite to inspect rendered HTML, routing, metadata, canonicals, or deployment behaviour as part of the fix. If the problem is a specific rendering or indexing fault, JavaScript SEO Rendering and Indexing Fix may be more useful.
Related Case Studies and Project Work
More Specific Service Pages
Traffic Drop After a Redesign or Replatform
Recover organic traffic after a redesign or replatform by isolating what changed in URLs, templates, rendering, metadata, or crawl signals before the drop compounds.
JavaScript SEO Rendering and Indexing Fix
Diagnose why Google is not indexing important JavaScript pages before incomplete HTML, unstable metadata, or routing changes keep them out of search.
Next.js Sitemap, Robots and Crawlability Debugging
Fix sitemap, robots, and crawl‑discovery failures before important Next.js pages stay hidden, blocked, stale, or hard for search engines to trust.
Next.js Redirects and URL Normalisation Fix
Fix duplicate URLs, bad redirects, and canonical mistakes before search engines and users keep landing on conflicting versions of the same page.
Related Services
Technical SEO Recovery and Debugging
Recover traffic, rankings, crawlability, and indexation after a release, redesign, or migration changes the technical signals search engines rely on.
Migrations to Next.js
Plan a Next.js migration from React, WordPress, Gatsby, Drupal, Shopify, or another legacy front end without putting routes, content, or search visibility at risk.
Performance Optimisation and Core Web Vitals
Performance work for modern front ends where page loads feel slow, Core Web Vitals are slipping, or scripting cost is hurting key user journeys.
Headless Architecture Consulting
Headless CMS architecture advice for decisions around preview trust, SEO controls, revalidation, and editorial workflow before they become operational pain.
Related Technical Articles
Why JavaScript Pages are Crawled but Not Indexed. Why JavaScript Pages are Crawled but Not Indexed
Why JavaScript pages get crawled but not indexed, covering rendered content, metadata, canonicals, links, noindex rules, quality, and crawl signals.
How to Compare Rendered HTML Before and After a Migration. How to Compare Rendered HTML Before and After a Migration
Compare rendered HTML before and after a migration, checking headings, metadata, links, schema, body copy, media, crawl signals, and launch risk.
Checking Rendered HTML for JavaScript Pages. Checking Rendered HTML for JavaScript Pages
Check rendered HTML for JavaScript pages by comparing source and DOM output across metadata, headings, links, schema, content, hydration, and crawlability.
How View Source Stopped Being Enough. How View Source Stopped Being Enough
Why view source stopped being enough for modern web checks, and how rendered HTML, hydration, metadata, schema, crawl paths, and client output changed audits.
Client‑Side Rendering and Search Visibility. Client‑Side Rendering and Search Visibility
How client‑side rendering can affect search visibility, and what to check around content, links, metadata, routing, loading states, and fallbacks.
JavaScript Rendering and SEO Checks. JavaScript Rendering and SEO Checks
JavaScript rendering and SEO checks for pages that rely on client‑side behaviour, including content, links, metadata, fallbacks, and rendered output.