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yseri.com website review

Visit site (opens in a new tab)Reviewed 10 November 202631 issues · 57 checks

This review found 31 issues worth fixing on yseri.com, 8 of them high impact, across 57 checks. The most urgent: 11 text elements with low contrast. Your full playbook turns these into prioritised fixes alongside reviews, competitors and channels.

  1. Homepage
  2. Phone render
  3. Links and pages
  4. Google PageSpeed

Google PageSpeed Insights (opens in a new tab), mobile

Full-page screenshot of yseri.com (phone) rendered by Google PageSpeed Insights

How it loaded on a phone

  1. yseri.com at 0.4 s0.4 s
  2. yseri.com at 0.8 s0.8 s
  3. yseri.com at 1.1 s1.1 s
  4. yseri.com at 1.5 s1.5 s
  5. yseri.com at 1.9 s1.9 s
  6. yseri.com at 2.3 s2.3 s
  7. yseri.com at 2.6 s2.6 s
  8. yseri.com at 3.0 s3.0 s

Speed

3 to fix98
  • Use efficient cache lifetimes

    834 KiB

    12 files are served with short cache lifetimes, so returning visitors download them again (834 KiB).

  • Improve image delivery

    818 KiB

    8 images could be 818 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

  • Render-blocking requests

    800 ms

    3 files block the first paint until they finish downloading. Deferring or inlining them could save about 800 ms.

  • Chained critical requests

    Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

3 checks passed
  • Mobile performance score: 98

    98/100

    Your mobile performance score is 98. That is in Google's “good” band (90 and up).

  • Main-thread work: 0.1 s

    A phone's processor spends 0.1 s on main-thread work while loading, 4 ms of it running JavaScript. That is comfortably low.

  • Server response: 1 ms

    1 ms

    Your server sent the HTML in 1 ms, well inside Google's 600 ms guideline.

Core Web Vitals

1 to fix99
  • First Contentful Paint: 1.9 s

    1.9 s

    The first text or image appears after 1.9 s on a phone. Good is under 1.8 s.

  • Not enough real-visitor data yet

    Chrome's UX Report (opens in a new tab) has too little real-visitor traffic for this site, so the figures here are lab measurements from Google's test phone on a throttled 4G connection.

5 checks passed
  • Largest Contentful Paint: 1.9 s

    1.9 s

    Your largest element renders in 1.9 s on a phone, inside Google's 2.5 s “good” threshold. The largest element is the text “- Welcome to jomin.net - - Resume - * 2022년 03월 : WISE I&C …”.

  • Speed Index: 2.5 s

    2.5 s

    Visually, the page fills in at 2.5 s (Speed Index), inside the 3.4 s “good” threshold.

  • Cumulative Layout Shift: 0

    0

    The layout barely moves while loading (CLS 0, good is under 0.1).

  • Total Blocking Time: 0 ms

    0 ms

    Scripts block the page for only 0 ms while loading. Good is under 200 ms.

  • Time to Interactive: 1.9 s

    1.9 s

    The page is fully interactive after 1.9 s.

Images and page weight

2 to fix70
  • 8 images far larger than shown

    804 KiB

    8 images are downloaded at several times the size a phone draws them, for example address1.png at 1,080 px wide, shown at 60 px. Resized copies would save about 804 KiB.

  • 8 images in older formats

    8 images (827 KiB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

  • About 0.2 g of CO₂ per visit

    0.23 g

    By the Sustainable Web Design model, a visit to your homepage emits about 0.23 g of CO₂e: 28.0 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

2 checks passed
  • Page weight: 843 KiB in 15 requests

    843 KiB

    Your homepage downloads 843 KiB in 15 requests on a phone: images 829 KiB (9), HTML 5 KiB (1) and scripts 5 KiB (2). That is a lean page.

  • Images load when needed

    Images below the first screen wait until the visitor scrolls to them.

Accessibility

8 to fixGoogle 7978
  • 11 text elements with low contrast

    11 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

  • <html> element must have a lang attribute (1 element)

    <html> element must have a lang attribute: 1 element on the page fails this check, rated serious by axe-core.

  • 8 images without alt text

    8 images have no alt text, which hurts accessibility and image search.

  • All page content should be contained by landmarks (8 elements)

    All page content should be contained by landmarks: 8 elements on the page fail this check, rated moderate by axe-core.

  • No main landmark

    The page has no <main> landmark, so screen-reader users cannot jump straight to the content.

  • Page should contain a level-one heading (1 element)

    Page should contain a level-one heading: 1 element on the page fails this check, rated moderate by axe-core.

  • 8 links without text

    8 visible links have no text or label, so screen readers cannot say where they go.

  • No page language

    The <html> element has no lang attribute, so screen readers may read the page in the wrong voice and accent.

  • Tables do not use <caption> instead of cells with the [colspan] attribute to indicate a caption.

    Tables do not use <caption> instead of cells with the [colspan] attribute to indicate a caption. (2 elements).

  • <td> elements in a large <table> do not have table headers.

    <td> elements in a large <table> do not have table headers. (1 element).

1 checks passed
  • 17 automated accessibility rules passed

    axe-core 4.13.0, the open-source engine behind most accessibility testing tools, ran 22 WCAG 2.2 A/AA and best-practice rules on the phone render: 17 passed and 5 failed. 2 mores need a person to judge. Automated rules catch about a third of accessibility problems; the rest need manual testing.

SEO

9 to fixGoogle 10057
  • No H1 headline

    There is no <h1>, so neither visitors nor Google get a clear main headline.

  • Title is short (14 characters)

    Your title is only 14 characters: “Jomin.Net SAAS”. Between 30 and 65 characters leaves room to say what you do and for whom.

  • No structured data

    No structured data (JSON-LD), so Google can't show rich results such as your logo, ratings or FAQs.

  • Meta description is short (29 characters)

    Your meta description is only 29 characters: “Intranet of Jomin.Net System.”. 70 to 160 characters is enough to sell the click.

  • No canonical URL

    No canonical URL, so duplicate versions of the homepage (with or without www, with tracking parameters) can split ranking signals.

  • No social preview image

    No Open Graph image (also missing: og:title, og:description), so links shared on LinkedIn, Slack or Facebook show no preview picture.

  • No XML sitemap

    No XML sitemap at http://yseri.com/sitemap.xml, so Google discovers your pages only by following links.

  • No robots.txt

    There is no robots.txt at yseri.com/robots.txt, the first file search crawlers ask for.

  • Only 0 internal links

    The homepage links to only 0 pages on your own site, so visitors and crawlers find few routes into the rest of it.

  • No X (Twitter) card tag

    No twitter:card tag. X falls back to Open Graph, which is incomplete here.

AI search readiness

1 to fix83
  • No Organization structured data

    There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

  • No llms.txt

    There is no https://yseri.com/llms.txt, a short Markdown guide to your key pages for AI tools (llmstxt.org). It is optional and few AI tools read it yet, so treat it as a cheap extra.

1 checks passed
  • AI answer engines may read the site

    There is no robots.txt, so nothing stops the crawlers behind ChatGPT search, Claude and Perplexity from reading the site and cite it in answers.

Best practices

2 to fixGoogle 7087
  • 13 small tap targets

    13 of 13 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

  • 1 JavaScript error while loading

    1 error was logged to the browser console while the page loaded, for example “Failed to load resource: the server responded with a status of 404 (Not Found)”.

1 checks passed
  • Mobile viewport set

    The page declares a mobile viewport.

Content and conversion

5 to fix33
  • No call to action on the first screen

    On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

  • No calls to action

    We found no call-to-action buttons or links (such as “Book a demo” or “Get a quote”) anywhere on the homepage.

  • No social proof

    No testimonials, customer logos, ratings or customer counts on the homepage: nothing tells a new visitor that others already trust you.

  • No analytics detected

    No analytics or tag manager detected in the HTML, so you can't measure whether any of these fixes work.

  • Only about 51 words

    The homepage has only about 51 words of visible text; thin pages give Google and first-time buyers little to go on.

  • No form on the homepage

    There is no form on the homepage, so every lead has to click through to another page first.

  • No risk reducer

    No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

1 checks passed
  • Direct contact links

    Visitors can reach you directly: 0 phone links and 1 email link.

Privacy and tracking

  • No consent tool detected

    No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

  • 1 other company contacted

    Loading the homepage contacts 1 host run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.

1 checks passed
  • No known trackers before consent

    No known advertising or analytics trackers load before a visitor clicks anything (measured from a US location before any click).

Security, domain, email and software versions

The security, domain and email checks, software and plugin versions, and any app with a known security problem are visible only to people at yseri.com, because details like these could help someone attack a site. Every review keeps them private, whatever they found.

Upkeep, stack and company

  • The footer still says © 2025.

Stack

Hosting
Korea Telecom

Upkeep, stack, hiring and company data from programmable.info

Go beyond the website

What your $25 Growth Playbook adds

This review found 31 issues on yseri.com, including 4 speed issues, 9 SEO issues and 5 conversion gaps. That is the website alone. The full Growth Playbook pairs these findings with what your customers say in public reviews and communities and what your closest competitors do better, then turns everything into at least 20 prioritised ideas, each with the evidence behind it, a step-by-step playbook, a metric and an owner.

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  • At least 20 ideas with evidence, a step-by-step playbook, metric, owner, effort and impact, grouped into this week, this quarter, big bets and wildcards, plus a 30/60/90-day roadmap
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