Optimizing an Existing Website
You do not always have to start over. We look at the site you already have, find what is actually holding it back, and tell you which fixes are worth the money.
The site you have is an asset, not a write-off
There is a reflex in this industry to answer every website problem with a rebuild. It is the largest project, so it is the one most often proposed. It is frequently the wrong answer.
A site that has been live for a few years has things a new one does not: search rankings that took time to earn, content people actually link to, a structure your customers have learned. Rebuilding discards all of that and then spends months trying to earn it back. Sometimes that is worth it. Often the site is fundamentally sound and three or four specific problems are doing most of the damage.
The only way to know which situation you are in is to measure rather than guess. That is what the audit is for.
What usually turns out to be wrong
The pattern repeats across most sites we look at:
Images nobody optimised. Photographs uploaded straight from a camera or a stock library, served at full resolution to a phone. This is the single most common cause of slow pages and among the cheapest to fix.
Scripts that block the page. Analytics, chat widgets, tag managers, tracking pixels, each added by someone with a good reason. Together they can delay the point at which the page becomes usable by seconds.
Structure that grew rather than being designed. Pages added one at a time until the navigation reflects your internal org chart instead of what a visitor is looking for.
Mobile treated as an afterthought. The layout technically responds, but the important content sits below three screens of hero image and the buttons are hard to hit.
Nothing measured. No analytics, or analytics installed and never looked at, so every decision about the site is somebody's opinion.
None of these require starting over. All of them cost you visitors every day they remain.
Symptoms and causes are different things
A performance report tells you a page is slow. It does not tell you why, and the why is the whole question, because the fixes differ by an order of magnitude in cost.
Slow because the images are unoptimised is an afternoon of work. Slow because there are eleven third-party scripts is a conversation about which ones you actually need. Slow because the server takes two seconds to respond is a hosting or database problem. Slow because the platform re-renders the entire page for every visitor is architectural, and that is the finding that occasionally does justify a rebuild.
We spend the audit time distinguishing between these, because recommending work without knowing which one applies is how budgets get spent on the wrong thing.
Prioritise honestly
Every audit produces a long list. A long list handed over without ranking is not much use, and it tends to result in either paralysis or the cheapest items getting done regardless of whether they matter.
So we rank by expected impact against effort, and we are explicit about our confidence in each estimate. Some items are obvious wins. Some are worth doing but will not move any number you care about. Accessibility fixes often fall here, and they are still worth doing for reasons other than conversion. Some are genuinely optional, and saying so is more useful than padding the list.
We also mark the point of diminishing returns. There is a real threshold beyond which further speed work stops changing user behaviour, and continuing past it is spending money for a better score rather than a better outcome.
Change in stages, measure as you go
Optimisation works best in batches small enough to attribute results to. Change fifteen things at once and you know the site got faster, but not which change did it, which makes the next round guesswork.
Working in stages also means the site stays live and usable throughout. There is no relaunch date to miss, no period where the old site is off and the new one is not ready, and any change that turns out to be a mistake can be reverted without unpicking everything else.
At the end we compare against the baseline and report plainly, including anything that did not work. A change that failed to move the metric is still information, and hiding it would only cost you on the next decision.
What you get
Technical and performance audit
Measured load behaviour on real devices and connections, with the specific causes identified (oversized images, blocking scripts, slow server responses) rather than a generic score.
Structure and content review
Where the navigation misleads, where pages overlap or compete, and where the information someone needs to decide is missing or buried.
Conversion path analysis
The route from arrival to enquiry or purchase, with the steps where people drop off marked and the likely reason for each.
A prioritised fix list
Every finding ranked by expected impact against effort, so you can see what to do first and what is safe to leave alone for now.
Implementation of the agreed fixes
We carry out the work on your existing site and stack, in stages that can each be verified, rather than requiring a rebuild before anything improves.
Measurement that stays in place
Analytics and performance monitoring configured so the effect of each change is visible and future regressions do not go unnoticed.
How we work
- 01
Establish the baseline
We measure before touching anything: load times, Core Web Vitals, current traffic and conversion behaviour. Without a baseline there is no way to tell whether the work paid off.
- 02
Find the causes, not the symptoms
A slow page is a symptom. We trace it back to whether it is the images, the scripts, the hosting or the CMS, because the fixes are entirely different and so are the costs.
- 03
Rank by impact against effort
Some problems are severe and cheap to fix. Some are severe and require rebuilding half the site. Separating those is the point of the audit and drives what we recommend.
- 04
Fix in verifiable stages
Changes go out in batches small enough that we can attribute the result to them. This also keeps the site working throughout rather than going dark for a relaunch.
- 05
Re-measure and decide what is next
We compare against the baseline, report what moved and what did not, and are direct about the point where further optimisation stops being worth it.
Tools and technology
Where a solid open-source tool exists, we choose it over a closed one. No lock-in to a single vendor, and costs you can actually predict.
- Lighthouse
- WebPageTest
- Matomo
- PostHog
- Next.js
- WordPress
- Chrome DevTools
- PageSpeed Insights
- Google Search Console
- Google Analytics 4
- Cloudflare
- Vercel
Frequently asked questions
More services in this category
Websites and Web Applications
A website earns its place by making it obvious what you do and easy to act on it. We build sites that load fast, read clearly and hold up as your business changes.
UX / UI Design
Good interface design is mostly about removing the moments where someone hesitates. We map the path your users actually take, then design screens that keep them moving along it.
Branding and Visual Identity
Branding is not just a logo. It is the set of decisions that makes your company recognisable in a feed, on an invoice and on a phone screen, without anyone having to read the name.
Read testimonials from companies that trusted us
Delivered well ahead of the deadline.
ZanReal's individual approach is impressive.
Knowledge and business intuition make them a valuable partner.
Quick solutions that reduced costs by 99%.
Latest
Technical guides, security insights, and what we've learned building with AI.
Your website in 24 hours: a new service from ZanReal
Do you need a website? With us, you can have one in just 24 hours! Find out more about our new service.
ZanReal is now an Official Vercel Partner!
We are pleased to announce that we have joined the Vercel partner program. ZanReal is now one of just a few official Vercel partners in Poland.
Curious about what's next?
View all postsNot sure whether to fix your site or rebuild it?
Message usSend us the address and what worries you most, whether that is speed, drop-off or mobile, and we will outline what an audit would check first.
Can't keep up with changes in AI world?
Let us do the heavy lifting. Every week we distill the most important AI developments into a focused 5-minute briefing - so you stay ahead without the noise.
Find out more