Crawl · Performance · Indexing · 60+ checks

Your site finally visible and fast

Technical SEO is not cosmetic tuning: it is the foundation that lets Google crawl, index and rank your site. We put it under the microscope (more than 60 checks fixed, server logs, Core Web Vitals) to unlock its real potential, led by Thibault Touzet, who has been rebuilding sites for over 20 years. To spot the blockers on a page yourself, our SEO page analysis tool gives an instant first diagnosis.

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The foundations

What is technical SEO?

The set of optimisations that let Google crawl your site efficiently, index your pages without errors and rank them without any performance penalty. Four areas to master.

Accessibility

Can Google reach your pages? We check crawlability, crawl budget and robots.txt blocks.

Understanding

Does Google understand what it crawls? Tags, canonicals, structured data and Hn hierarchy.

Performance

Does your site respond fast enough? We optimise the Core Web Vitals: LCP, INP and CLS.

Indexability

Are your pages actually indexed? We compare sitemap, real index and Search Console errors.

Without solid technical SEO, you leave 30 to 50% of your ranking potential on the table.

The big clean-up

More than 60 checks verified and fixed

Ten families of criteria inspected one by one, then fixed so Google can explore and understand your site without the slightest friction

Speed & Core Web Vitals

8
  • Largest Contentful Paint (LCP)
  • Interaction to Next Paint (INP)
  • Cumulative Layout Shift (CLS)
  • First Contentful Paint (FCP)
  • Time to Interactive (TTI)
  • Total Blocking Time (TBT)
  • Speed Index
  • Uncompressed content

Indexing & crawl

8
  • Unintended noindex pages
  • Blocked by robots.txt
  • X-Robots-Tag header
  • Orphan pages
  • Wasted crawl budget
  • 404 pages
  • 500 server errors
  • Non-canonical pages in sitemap

Sitemap & robots.txt

6
  • Missing sitemap
  • Sitemap too large
  • Sitemap missing from robots.txt
  • Missing robots.txt file
  • URLs too long
  • Canonical chain

Duplicate content & canonical

6
  • www / non-www redirect
  • Multiple canonical tags
  • Duplicate content
  • URLs with double slashes
  • Inconsistent trailing slash
  • Redirected canonical

Title & meta description

8
  • Missing title tag
  • Title too long
  • Title too short
  • Duplicate titles
  • Multiple title tags
  • Missing description
  • Duplicate descriptions
  • Description too long

Hn structure

5
  • Missing H1 tag
  • Empty H1 tag
  • H1 tag too long
  • Multiple H1 tags
  • Identical title and H1

Links & redirects

7
  • Broken internal links (404/500)
  • Broken external links
  • Redirect chain
  • Redirect loop
  • 302/307 redirect instead of 301
  • Meta refresh redirect
  • Nofollow internal links

Security

5
  • Valid SSL certificate
  • HTTPS redirect
  • Mixed HTTP content
  • Up-to-date encryption protocol
  • HTTP in the sitemap

Images & media

4
  • Missing alt text
  • Oversized images
  • AVIF / WebP compression
  • Unspecified dimensions (CLS)

JavaScript & CSS

5
  • JavaScript too heavy
  • Unminified JavaScript
  • Unminified CSS
  • Too many render-blocking files
  • Uncached resources

Crawl & indexing

The truth is in the server logs

Server logs are the only source that shows what Google actually explores. We analyse them to understand your crawl budget and stop the waste.

Why analyse server logs?

They reveal the pages Google really visits, the ones it ignores and the zones where it spends your crawl budget for nothing.

Crawl budget: understanding and optimising it

On a large site, every crawl counts. We focus the budget on your strategic pages and block the noise: facets, parameters, duplicates.

Performance

Core Web Vitals: the performance signals

Three metrics measure the real experience of your visitors. Google uses them to separate pages with equivalent content.

LCP

Largest Contentful Paint

Time until the main content is displayed

Good: < 2.5 s

INP

Interaction to Next Paint

How responsive the site is to interactions

Good: < 200 ms

CLS

Cumulative Layout Shift

Unexpected visual layout shifts

Good: < 0.1

JavaScript SEO

When Google has to render your site

Content generated in JavaScript has to be rendered by Google first to exist. Three approaches, three levels of risk.

SSR: server-side rendering

The HTML arrives complete: the best option for SEO, content visible immediately.

CSR: client-side rendering

Content is built on the client: slower to index, best kept for private interfaces.

Hydration

A middle ground: HTML served then enriched with JavaScript, provided it is well controlled.

The common traps: content invisible to the crawl, links that cannot be explored for lack of <a> tags, and identical metadata across every page.

The complete method

A technical SEO audit in 5 phases

From the server log to the prioritised action plan, each step produces a concrete deliverable.

  1. 01

    Server log analysis

    1 to 2 weeks

    We download your logs, identify Google's crawl patterns, calculate your crawl budget and detect wasted pages.

    Map of the real crawl

  2. 02

    Technical crawl

    1 week

    We comb through the whole site: 4xx/5xx errors, redirects, canonicals, metadata and duplicate content.

    Prioritised list of errors

  3. 03

    Performance

    1 week

    We test the Core Web Vitals page by page and surface the bottlenecks: images, JavaScript, server time.

    Speed optimisation plan

  4. 04

    Indexing

    1 week

    We check what is actually indexed, identify pages missing from the index and analyse the causes: noindex, robots.txt, misplaced canonicals.

    Indexing diagnosis

  5. 05

    Report and prioritisation

    Synthesis

    We consolidate everything into a severity / impact / effort table to guide the work, from quick wins to deeper rebuilds.

    Actionable roadmap

What most sites miss

The invisible problems

You cannot see them with the naked eye, they do not spoil the design, but they quietly hold your rankings back.

1

Inefficient crawl

On most sites Google crawls, but not the right pages. The crawl budget drains into worthless URLs.

2

Misconfigured canonicals

URL variants without a correct canonical tag create cannibalisation and dilute your authority.

3

JavaScript that hides content

Content generated in JavaScript stays invisible to engines that do not render it, or render it only partially.

4

Degraded Core Web Vitals

A slow site gets penalised: poor LCP, janky interactions and layout shifts that drive visitors and Google away.

5

Partial indexing

100,000 URLs in the sitemap but only 30,000 indexed: forgotten noindex tags, overly broad robots.txt, orphan pages.

Depending on your site

Large sites, e-commerce, SaaS

Technical priorities are not the same across models. We tailor the work to your reality.

Large sites

  • Server log analysis
  • Blocking useless facets
  • Hierarchical sitemaps

E-commerce

  • Canonicals on product variants
  • Blocking filter facets
  • Product structured data

SaaS

  • Server-side rendering (SSR) of public content
  • Crawlable demo versions
  • Core Web Vitals optimisation

That is not all

Optimisations included as standard

Full backup before any work
Adding structured data
Maximising crawl budget
Server log analysis
Image compression
Rewriting meta titles and descriptions
Forced indexing of your unindexed pages
Rewriting the Hn structure of pages
Fixing Search Console errors
Audit before and then after the work

Total transparency

Follow our optimisations step by step

Thanks to our project tracking tool, you keep an eye on every optimisation we put in place, in real time.

Roadmap

Follow our work day by day and ask your questions directly in the project tracking tool.

Collaboration

We work with your usual collaboration tools, such as Google Docs or Sheets.

One fair, flat price

The technical SEO service

  • 60+ checks verified and fixed
  • Server log and crawl budget analysis
  • Audit before + after the work
  • Online project tracking
  • Fixes delivered within 1 month
  • Overall SEO strategy to put in place
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We answer you

FAQ: technical SEO in plain terms

How long does it take to see results from a technical SEO audit?

It depends on complexity. Simple fixes (canonicals, robots.txt, tags) show results within 2 to 4 weeks. Deeper work, such as optimising Core Web Vitals or reshaping the crawl of a large site, is better measured over 2 to 3 months.

Is technical SEO more important than content?

No, but it is the foundation. Without solid technical SEO, your content will never be crawled, indexed or ranked properly. The two work together: the technical side opens the door, the content brings the visitors in.

Do you really need to analyse server logs?

Yes, as soon as you go beyond a few thousand URLs. Logs are the only source of truth about what Google actually explores: they reveal wasted pages, zones never visited and abnormal crawl spikes that no other tool shows.

Which Core Web Vital matters most?

LCP (Largest Contentful Paint), meaning the time until the main content is displayed. It is the signal that weighs most on perceived experience and the one most often degraded by heavy images or a slow server.

Should I use server-side (SSR) or client-side (CSR) rendering?

SSR is preferable whenever SEO is a priority: public content, blogs, e-commerce. CSR suits app interfaces behind authentication, where indexing does not matter. When in doubt, favour server-side rendering or well-controlled hydration.

How do I know if my site has an indexing problem?

Compare the number of pages in your sitemap with the number actually indexed in Search Console. A large gap points to unintended noindex tags, robots.txt blocks or canonicals that send Google elsewhere.

Should e-commerce facets be indexed?

No in most cases: filters and facets generate a flood of near-duplicate URLs. We block them from crawling or set them to noindex, keeping only the combinations with genuine search potential indexable.

What is the best tool for a technical SEO audit?

There is no single one: it all depends on the size of the site and your budget. We combine a crawler, log analysis, Search Console and Core Web Vitals measurement tools. The tool matters less than the method and the interpretation.

Your free audit, explained on video

We analyse your site and send you back a clear video of the technical points to fix first, with no commitment

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