Technical SEO audit services, with the fixes built by engineers

Most SEO audits end as a long report. Ours end as working fixes: crawling, indexing, speed, structured data and site architecture, implemented in your codebase or CMS by the developers who found them.

  • Free audit call
  • Custom quotation, never a fixed package
scripts/seo-check.ts
1// Fail the build when SEO basics break2for (const url of await sitemapUrls()) {3  const page = await crawl(url);4  expect(page.status).toBe(200);5  expect(page.h1Count).toBe(1);6  expect(page.canonical).toBe(url);7  expect(page.title.length).toBeLessThanOrEqual(60);8}
  • Crawling
  • Indexing
  • Core Web Vitals
  • Structured data

Worked with

Problems we solve

Good content, but Google isn't showing it?

Technical problems quietly stop good pages from being crawled, indexed or ranked.

  1. 01

    Pages not indexed

    Important pages are missing from Google, or the wrong versions are indexed.

  2. 02

    Slow on mobile

    Poor Core Web Vitals hurt users and search visibility.

  3. 03

    Messy redirects and duplicates

    Old URLs, parameters and duplicate pages split signals.

  4. 04

    Audits that never get fixed

    Previous reports listed problems nobody had the skills to fix.

Our solution

An audit that ends in working code

We find technical issues, rank them by impact and fix them ourselves or with your developers.

  • Evidence-based

    Every finding comes with the URLs, data and reason it matters.

  • Prioritised

    Fixes ordered by impact and effort, not a list of 200 warnings.

  • Implemented

    Engineers implement fixes and add checks so problems don't return.

What we cover

Technical SEO services

The areas a technical audit and fix programme covers.

01

Crawling and indexing

Robots rules, sitemaps, canonicals, noindex tags, status codes and Search Console coverage reviewed and corrected.

  • robots.txt
  • XML sitemaps
  • Canonical tags
  • Status codes
  • Index coverage
  • Crawl budget on large sites
02

Core Web Vitals and speed

LCP, INP and CLS improvements through image, font, script and rendering changes, measured before and after.

  • Largest Contentful Paint
  • Interaction to Next Paint
  • Layout shift
  • Image optimisation
  • Script reduction
  • Caching and hosting
03

Site architecture and internal links

URL structure, navigation depth, hub pages and internal links organised so important pages are easy to reach and understand.

  • URL structure
  • Click depth
  • Hub and pillar pages
  • Internal links
  • Orphan pages
  • Breadcrumbs
04

Structured data

Schema markup for organisation, local business, services, articles, FAQs, products and breadcrumbs, validated and kept in sync with content.

  • Organization
  • LocalBusiness
  • Service
  • Article
  • FAQ
  • BreadcrumbList
05

Migrations and redirects

Domain changes, redesigns and platform moves planned with full redirect maps and post-launch monitoring.

  • URL mapping
  • 301 redirects
  • Redirect chains
  • Domain moves
  • HTTPS
  • Post-launch checks
06

JavaScript and framework SEO

Rendering, routing and metadata for React and Next.js sites, so content and links are in the HTML search engines see.

  • Server rendering
  • Metadata APIs
  • Dynamic routes
  • Client-side links
  • Hydration issues
  • Lazy-loaded content

What you get

What a technical SEO programme delivers

A site that search engines can crawl, understand and trust.

  • Clean indexing

    The right pages in Google.

  • Faster pages

    Better Core Web Vitals on mobile.

  • Clear structure

    Logical URLs and internal links.

  • Rich results eligibility

    Valid structured data.

  • Safe migrations

    Redirects planned and monitored.

  • Checks that stay

    Automated tests that catch regressions.

Why us

Why teams choose Zero One Creation

  • Engineers do the audit

    The people who find issues can fix them in code.

  • Next.js and React depth

    We build with the frameworks many modern sites use.

  • Honest priorities

    We focus on the fixes that matter, not on long reports.

  • Clear written scope

    A proposal with scope and a customised quotation.

Share your website and Search Console access, and we'll show you the technical issues worth fixing first.

A free audit call, then a written proposal with a customised quotation.

Our approach

How we run a technical SEO audit

Open each step to see what it covers.

  1. 01.Access and baseline

    Search Console, analytics and a crawl of the site.

  2. 02.Audit

    Crawling, indexing, speed, structure, schema and rendering reviewed.

  3. 03.Prioritise

    Issues ranked by impact and effort in a short action plan.

  4. 04.Fix

    Changes implemented by us or alongside your developers.

  5. 05.Verify

    Fixes validated in Search Console and performance tools.

  6. 06.Guard

    Automated checks added to catch future regressions.

Common situations

Where technical SEO work usually starts

Most audits begin with one of these situations.

  • Traffic dropped after a redesign

    What you notice
    Rankings and clicks fell after a new website launched.
    How we fix it
    Redirect and content audit against the old site, with fixes for missing pages and broken signals.

  • A JavaScript site isn't ranking

    What you notice
    A React or SPA site has good content but little search visibility.
    How we fix it
    Server rendering, metadata and link fixes so content is visible to crawlers.

  • Poor mobile performance

    What you notice
    PageSpeed shows slow LCP and heavy scripts.
    How we fix it
    Image, font, script and rendering changes, measured before and after.

  • Thousands of junk URLs indexed

    What you notice
    Filters, parameters or old pages fill the index.
    How we fix it
    Canonicals, noindex, parameter handling and clean sitemaps.

Options

Audit-only, audit plus fixes, or ongoing technical SEO?

How the main options compare.

Audit-only, audit plus fixes, or ongoing technical SEO?
CriteriaAudit plus fixesAudit report onlyOngoing technical SEO
DeliverableWorking fixesA reportContinuous monitoring and fixes
Needs your developersOptionalYesOptional
Regression protectionChecks addedNoneMonitored
Best forSites with known problemsTeams with strong developersLarge or fast-changing sites

Content and link building are separate from technical SEO; see our SEO service for the full picture.

Who we help

Technical SEO for different websites

Common site types we audit.

  • Next.js and React sites

    Rendering, metadata and routing.

    See the work

  • E-commerce stores

    Filters, variants and product schema.

    See the work

  • Websites after a redesign

    Lost rankings and redirects.

    See the work

  • Content-heavy sites

    Blogs, categories and duplication.

  • SaaS products

    Marketing sites, docs and app separation.

    See the work

  • Local businesses

    Local schema and location pages.

    See the work

How we work together

Three ways to work with us

Every engagement starts with a written proposal and a customised quotation.

  • Audit and fix

    A full audit with fixes implemented.

    Best for: Sites with known issues

  • Migration support

    Planning and monitoring a redesign or domain move.

    Best for: Sites about to change

  • Monthly technical SEO

    Monitoring, fixes and checks each month.

    Best for: Large or growing sites

Guide

Technical SEO: a practical guide

What technical SEO covers

Technical SEO makes sure search engines can crawl, render, understand and index your pages, and that users get a fast, stable experience. It covers status codes, sitemaps, canonicals, speed, structured data, architecture and rendering.

It doesn't replace good content or reputation, but it makes sure they aren't wasted.

Start with Search Console

Google Search Console shows which pages are indexed, why others aren't, Core Web Vitals from real users and which queries bring clicks. It is the most reliable starting point for any audit.

Combine it with a crawl of your site to see the structure search engines encounter.

Core Web Vitals in practice

Largest Contentful Paint is usually improved by faster servers, smaller hero images and less render-blocking code. Interaction to Next Paint improves when heavy JavaScript is reduced. Layout shift is fixed by reserving space for images, ads and fonts.

Measure on real mobile devices and data, not only on a fast office connection.

JavaScript sites need extra care

Search engines can render JavaScript, but delays and errors are common. Server rendering or static generation puts content and links directly in the HTML, which is safer for important pages.

Use real links for navigation, and make sure metadata is set per page on the server.

Preventing regressions

Technical SEO problems often return with new releases. Automated checks for status codes, titles, canonicals and sitemaps in your build pipeline catch problems before they go live.

Review Search Console regularly for new indexing issues.

Large and e-commerce sites

Sites with thousands of pages face extra challenges: filters and parameters creating near-duplicate URLs, thin category pages and crawl budget spent on low-value pages.

Clear rules for canonicals, noindex and sitemaps keep crawlers focused on the pages that matter.

Structured data done carefully

Structured data helps search engines understand your pages and can make them eligible for rich results. It must match visible content and stay accurate.

Generate it from the same data as the page, so it never drifts out of sync.

International and multi-language sites

Sites targeting several countries or languages need hreflang annotations, clear URL structures and consistent canonicals.

Mistakes here often cause the wrong version to appear in search results.

Reading Search Console coverage reports

Pages marked as crawled but not indexed often have thin or duplicate content. Pages marked as discovered but not crawled may be too deep or have weak internal links. Redirect and 404 reports show where old links lead.

Treat the report as a list of questions, not a list of errors to clear blindly.

Internal linking strategy

Links from strong pages pass authority and help search engines discover and understand important pages. Link from pillar pages to sub-pages, from articles to the services they support, and keep important pages within a few clicks of the home page.

Use descriptive anchor text rather than generic phrases.

Page experience beyond Core Web Vitals

Search engines and users also care about HTTPS, mobile usability, no intrusive pop-ups and stable layouts. Cookie banners and chat widgets should not block content or shift the page as it loads.

Small details like these affect how visitors perceive the site and how long they stay.

Technical SEO for AI and voice search

AI assistants and voice search draw on clear, well-structured content. Pages that answer specific questions directly, use descriptive headings and include accurate structured data are easier for these systems to understand and cite.

The same practices help traditional search results.

Logs and crawl data for large sites

On large sites, server logs show how search engine crawlers actually move through the site: which pages they visit often, which they ignore and where they waste time.

Combining log data with Search Console and a crawl reveals problems a single tool misses.

What affects the cost of technical SEO

Costs depend on site size, platform, the number and complexity of issues, whether we implement fixes, and ongoing monitoring.

We don't publish fixed prices or packages. After an audit call, we send a written proposal with a customised quotation.

Before you talk to us

Frequently asked questions

What is a technical SEO audit?

A review of how search engines crawl, render and index your site, plus speed, structure and structured data, with prioritised fixes.

Do you fix the issues you find?

Yes. Our engineers implement fixes in your codebase or CMS, or work alongside your developers.

Do you need Search Console access?

It helps a lot. Read access to Search Console and analytics makes the audit far more accurate.

Can you improve Core Web Vitals?

Yes. We work on images, fonts, scripts, rendering and hosting, and measure before and after.

Do you work with Next.js and React sites?

Yes. We build with them daily and know their SEO specifics.

Do you guarantee rankings?

No. Nobody can guarantee rankings. We fix technical barriers so your content has the best chance to perform.

Can you help with a website migration?

Yes. We plan redirects, check the launch and monitor Search Console afterwards.

How long does a technical audit take?

It depends on site size and access. We agree a timeline in the written proposal.

Can you add SEO checks to our build pipeline?

Yes. Automated checks for status codes, titles, canonicals and sitemaps can run on every deployment.

Do you handle hreflang for multi-language sites?

Yes, including URL structure and canonicals.

Do cookie banners and pop-ups affect SEO?

They can, if they block content or shift the layout. We check and adjust them.

Can you help our site appear in AI search answers?

We improve structure, clarity and structured data, which helps AI and voice search understand your pages. Inclusion can't be guaranteed.

How much does a technical SEO audit cost?

It depends on site size, platform and whether we implement fixes. We do not publish fixed prices; share your site for a customised quotation.

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