How to Use SEO Cheki for Beginners | From Basic Operations to Advanced Tactics
When you start working on SEO, one of the first practical needs is the ability to quickly check the SEO status of your own site or a competitor's site — title tags, headings, outbound link counts, keyword frequency, indexing status, and so on — without spending hours setting up enterprise tools. SEO Cheki (SEOチェキ) is a long-standing free Japanese SEO diagnostic tool that fills this exact niche: enter a URL, click Check, and the main SEO data points for that page are returned in a single view, with no signup or download required.
That said, beginners often have follow-up questions: which features should I use first, what do the numbers actually mean, how does this differ from Google Search Console or GA4, and where does it fit in a serious SEO workflow. This article walks through what SEO Cheki is, how to use its six main features, how to read the result page, advanced techniques like the bookmarklet and competitor analysis, how to combine SEO Cheki with Search Console, GA4, and other SEO platforms, and the most common pitfalls. It is written for SEO beginners getting started and for practitioners who want to extract more value from a tool they may already be using casually.
SEO Cheki is a free online SEO diagnostic tool that returns SEO-related data for any URL in a single view. There is no signup, no download, and no installation required. Just open the official site (seocheki.net) in any browser, enter the URL you want to inspect, and click Check. Within seconds the result page returns the title tag, meta description, meta keywords, h1 tag, outbound link counts, indexed page counts, keyword frequency, search ranking for a given query, Whois information, and more. The breadth of data points covered in a single view is the main reason this tool is so widely used by SEO beginners and practitioners alike in Japan.
SEO Cheki has been maintained for many years by an individual developer who goes by the handle Ropuros. The site is intentionally lightweight, fast, and free, and it covers the SEO data points most commonly needed in day-to-day operations without bolting on extra features. Because everything happens in the browser with no installation, the tool works equally well on PC and smartphone, and the result URLs can be shared internally between team members as a single reference point for discussion.
The main SEO-related data points you can check with SEO Cheki are: (1) title tag, meta description, meta keywords, and h1 tag, (2) internal and external outbound link counts, (3) last-modified date, file size, and load time, (4) Google and Yahoo! indexed page counts, (5) host information, (6) domain registration date, (7) Google search ranking for a specified keyword, (8) keyword frequency in the page body, (9) Whois information (domain registrant and registrar details), and (10) HTTP response headers. These are essentially the data points you reference in everyday SEO diagnostics, so SEO Cheki works well as a first-pass site checker.
Some social-related metrics (Facebook likes, social bookmarks) are also listed as fields, but they may not return values because of changes in the upstream APIs of those platforms. The important point is that SEO Cheki gives you a single-page overview of the SEO data that actually drives evaluation — titles, headings, indexing, links, ranking, and keyword density. If you need deeper data such as a full backlink profile, domain authority, or search volume, that requires dedicated SEO platforms like Ahrefs, Semrush, or Ubersuggest used alongside SEO Cheki.
The biggest practical strength of SEO Cheki is that every feature is free and no signup or login is required. You can send a result URL to a colleague or manager and they can view it without creating an account, hand the tool to a new hire as part of their SEO onboarding, or quickly inspect a competitor's site — none of these everyday workflows are blocked by friction. Compared to other free SEO tools like Ubersuggest, which limits non-paid users to a small number of queries per day, SEO Cheki provides up to 200 queries per IP address per day across the combined Site SEO Check and Search Ranking Check features — a quota that almost never matters in normal usage.
The other features (outbound link check, keyword frequency, Whois, HTTP headers) are not subject to that limit in practice. If you need to run very large numbers of audits, you'd usually switch to a paid SEO platform or distribute the workload across multiple IPs. For day-to-day operations and for diagnosing small to mid-size sites, SEO Cheki by itself covers a surprisingly large surface area, and it's a great cost-zero entry point for starting SEO work.
Site SEO Check is the central feature of SEO Cheki. Enter the URL of the page you want to inspect into the URL field on the home page, click Check, and the tool returns the SEO-related data for that page in a single view. The result includes the title, description, keyword, and h1 tags, internal and external outbound link counts, image count and presence of alt attributes, last-modified date, file size, load time, Google and Yahoo! indexed page counts, host information, domain registration date, and a handful of social signals. It's everything you need for an initial diagnostic, presented compactly.
In practice, this is the tool you reach for when you start SEO work on a new site, when you want to compare a page before and after a rewrite, when you want to inspect competitor pages at a basic level, or when you want a final pre-launch sanity check. In about five minutes, you can verify whether the title, description, and h1 are aligned with the page's intent, whether the description is filled in, whether there's only one h1 on the page, and whether image alt attributes are missing. For full-site evaluation you'll need Search Console and a proper site crawler, but for fast per-page diagnostics SEO Cheki is the shortest path available.
Search Ranking Check lets you check the current Google ranking of a specified URL for up to three target keywords. Select Search Ranking Check from the home page, enter your target URL, enter the keywords you want to check (up to three), and click Check. For each keyword you'll see either the current ranking position (if within the top 100) or out-of-range if the page does not rank in the top 100. The ranking is fetched in real time at the moment of the check, and there aren't many free tools that offer this level of simplicity for ad-hoc rank checking.
A useful pattern is to bucket your target keywords into three groups — main keyword, compound keywords, and long-tail — and record the current ranking for each on a weekly or monthly cadence. Instead of obsessing over day-to-day fluctuations, the highest-leverage move is to identify pages sitting just outside page one or in the 11–20 range and prioritize them for rewrite work. Note that SEO Cheki rankings are influenced by the IP, location, and login state at the time of the query, so for strict measurement you should pair this with Search Console's Performance report, which uses Google's official data.
Outbound Link Check returns a list of every link on the specified page — internal links pointing within the same domain and external links pointing to other domains. Select Outbound Link Check from the home page, enter the URL, and the result page lists each link's destination URL, anchor text, and rel attributes (such as nofollow). You can also reach the same list by clicking See all outbound links from the Site SEO Check result page.
There are two practical workflows. First, internal link auditing: check whether your important pages are receiving the internal links you expect, whether vague anchor text like click here is being overused, and whether pages that are supposed to be isolated have stray internal links pointing to them. Second, external link auditing: verify that external destinations haven't drifted into spam or low-quality sites, that PR, advertising, and sponsored links carry the appropriate rel attribute (rel=sponsored or rel=nofollow where applicable), and that there are no broken or redirected links.
Keyword Frequency Check counts how many times each word appears in the body of the specified page and reports the percentage share of each. Select Keyword Frequency from the home page, enter the URL, and the result page lists the most frequent words with their occurrence count and percentage. This is the feature you use to check whether the keywords aligned with your search intent are actually present in the body at a reasonable density.
Important caveat: modern SEO does not work on the simplistic rule that X percent keyword density is good. Google evaluates content using context, co-occurring terms, E-E-A-T, and many other multi-faceted signals, so unnaturally stuffing a target keyword is counter-productive (over-optimization). The right way to use this feature is for detecting absence and imbalance — for example, noticing that your main keyword does not appear in the body at all, spotting unnaturally high frequencies that should be rewritten using synonyms, or confirming that the expected co-occurring terms are present. As a rough heuristic, a natural distribution often has the main keyword around 3–5 percent of the page with co-occurring terms supporting it.
Whois Information returns the registrant, registrar, registration date, and expiration date of a domain. Select Whois Information from the home page, enter the domain, and the result page lists the registrar (registration body), registrant information, name servers, the domain's creation date, and its expiration date in a single view.
Practical uses include verifying the operating history and the operating entity of a competitor site, avoiding accidentally letting your own domain expire, and checking the registration history of a domain you're considering buying as a used or aged domain. Older domains tend to be slightly advantaged in SEO (longer operating history accumulates content and backlinks over time), so knowing how long a competitor has been operating is useful input when planning your SEO strategy. Note that for many Japanese domains, Whois data is masked or proxied for privacy reasons, so you may not always see the real registrant identity.
HTTP Header Information returns the HTTP response headers for a specified URL — including the response status code (200, 301, 302, 404, 500, and so on), server type (Apache, Nginx, Cloudflare, etc.), Content-Type, last-modified date, Cache-Control, Set-Cookie, X-Frame-Options, and other standard headers.
Common practical uses include verifying that redirects are correctly returning 301 (permanent) rather than 302 (temporary), confirming that HTTPS pages are correctly reachable via 301 redirects from their HTTP counterparts, checking that Cache-Control is set appropriately, and validating that a CDN or caching layer like Cloudflare is behaving as expected. This feature is particularly valuable during site migrations, domain changes, HTTPS transitions, and CDN rollouts, and it serves as a shared language between SEO teams and engineering for diagnosing technical issues.
The top of the result page shows the target page's title, description, keyword, and h1. The title is the single most important element because it influences both SEO evaluation and click-through rate. Verify that the target keyword is positioned toward the left and that the title fits within roughly 30 to 35 characters in Japanese. If the title is too long, the tail will be truncated in search results, so the design principle is to put the most important message in the first half.
The description appears as the snippet in search results, so it should include the target keyword and convey the page's main point and the benefit the user will get, in roughly 120 characters. If left blank, Google will auto-generate a snippet from the body, but you typically want explicit control of this, so the rule of thumb is to write a unique description for every page. The h1 should be a single h1 per page, with the same intent as the title, expressing the page's content concisely. If multiple h1s are detected or the h1 is empty, treat the page template or CMS configuration as something to fix.
Outbound link counts are split into internal and external links. In general, internal links should be placed between related pages in a balanced way; extremely low (only navigation links) or extremely high counts (over 100 outbound links on a single page) often indicate that the site structure and content design need review. External links to high-quality references are fine, but for PR or advertising placements you'll want to apply the appropriate rel attribute (typically rel=sponsored).
Also check the image count, alt attribute coverage, file size, and load time. If the file size is disproportionately large for the image count, image optimization (WebP conversion, resizing, lazy loading) is a candidate for improvement. If load time exceeds three seconds, it's likely hurting user experience and Core Web Vitals, so dig deeper with PageSpeed Insights and pursue image optimization, JavaScript reduction, server response time improvements, and similar fixes. SEO Cheki is a quick-check tool, so for detailed performance analysis use it alongside dedicated tools.
Google and Yahoo! indexed page counts are approximate values from the site: operator's search result count, giving you a rough idea of how many pages of the site are indexed. The authoritative source for actual indexing status is Search Console's Page Indexing report, but for quickly sizing up a competitor's footprint, the SEO Cheki numbers are convenient. If the indexed count diverges significantly from the actual number of content pages on the site, suspect causes like large numbers of low-quality pages being excluded, duplicate content being removed, missing noindex configuration, or sitemaps not being submitted.
Under domain information, you can see the domain's creation date and expiration date. Longer-running domains tend to be slightly advantaged in SEO (content and backlinks accumulate over time), so knowing the age of competitor domains is useful for setting strategy. If your own domain's expiration is approaching, set up a calendar alert in your domain management tool so you don't accidentally let it lapse.
If you use SEO Cheki daily, configuring the bookmarklet is essentially mandatory. A bookmarklet is a small script stored in your browser bookmarks bar that, when clicked, performs a specific action — in SEO Cheki's case, it runs the SEO diagnostic against whatever page is currently open in your browser. The bookmarklet link is provided at the bottom right of the SEO Cheki result page; just drag it into your bookmarks bar to install it.
Once you have the bookmarklet, you can be browsing any competitor's page and, the moment you think I want to inspect this page, you're one click away from the SEO Cheki result page for that exact URL. This dramatically speeds up tasks like running competitor audits across multiple sites, inspecting interesting pages as you do desk research, and pre-launch quality checks across every page of a site. It's one of the highest-ROI configurations for anyone using SEO Cheki regularly.
SEO Cheki works on any URL, including your competitors'. Pull the top-ranking pages for a target keyword, run each through SEO Cheki, and you can see — in one place — how their title, description, and h1 are constructed, whether they declare target keywords in meta keywords, their indexed page count and domain operating history, the volume and quality of their internal and external links, their keyword frequency distribution, and the operating entity revealed by Whois data.
The practical workflow is: search Google for your target keyword, list the URLs ranking 1 through 10, run each through SEO Cheki, transcribe the results into a spreadsheet, and compare across columns like title character count, h1 phrasing pattern, median internal link count, domain age, and so on. Each page audit takes only seconds, so a 10-page × 5-metric competitor matrix is typically completed in 30 minutes to an hour. From this matrix you can design your rewrite strategy as match the median of the top results while preserving our unique strengths, which is a highly repeatable improvement approach.
For content SEO operations, recording what changed before and after a rewrite is important. Take a screenshot of the SEO Cheki result for the page before the rewrite (capturing title, description, h1, keyword frequency, and outbound link counts), do the same after the rewrite, and you have a compelling before/after evidence pair to attach to internal reports or management updates.
Especially for multi-page rewrite projects, pairing this before/after evidence with Search Console's position, click, and impression trends creates a fertile environment for hypothesis testing: which elements of the rewrite drove ranking and CTR changes. Because SEO Cheki is instant and free, building this evidence-capture step into your routine workflow accumulates organizational knowledge over time and makes your SEO operation more reproducible and defensible.
The tools most often confused with SEO Cheki are Google Search Console and Google Analytics 4 (GA4). Search Console provides actual search-result performance (impressions, clicks, average position) and indexing status from Google's official data — it is the source of truth for SEO evaluation. GA4 measures user behavior after the visitor lands on the site (time on page, navigation, conversions) and is the layer where you evaluate whether the traffic SEO brings in actually drives business outcomes.
By contrast, SEO Cheki is a tool for quickly taking a snapshot of the site's current state (title, h1, internal links, indexed counts, keyword frequency, and so on). Its role is fundamentally different from Search Console and GA4. The practical workflow is to combine all three: diagnose the site's current state with SEO Cheki, verify search-result performance in Search Console, analyze post-visit behavior in GA4, form a rewrite hypothesis, execute it, then re-check the implementation in SEO Cheki. Each tool plays to its own strength.
Paid SEO platforms like Ahrefs, Semrush, and Ubersuggest offer advanced analytical features that SEO Cheki simply does not — full backlink profile drill-downs, large-scale competitor keyword extraction, accurate search-volume figures, domain authority scores, SERP analysis, and content gap analysis. For mid- to large-scale SEO projects, or for any investigation that includes competitive backlink strategy, adopting one of these paid platforms is essentially a prerequisite.
However, paid platforms typically cost tens to hundreds of thousands of yen per month, so when you're still learning SEO basics and running personal or small business sites, SEO Cheki by itself covers a large surface area. The combination of free, instant, no signup, and 200 queries per day is a different kind of value that paid tools don't replicate. In practice, the ideal split is: daily diagnostics in SEO Cheki, deep analysis in paid platforms, search-result truth in Search Console.
Two free or freemium SEO tools that pair particularly well with SEO Cheki are Rakko Keyword and the free Ahrefs site checker (Ahrefs Webmaster Tools, among others). Rakko Keyword pulls keyword suggestions, related queries, and co-occurring terms in bulk, so after you use SEO Cheki to see what keywords are present on your page, Rakko Keyword helps you identify the keywords that should be there but are missing.
The free Ahrefs site checker provides limited access to backlink data, domain authority, and traffic estimates — exactly the external evaluation snapshot that SEO Cheki doesn't cover. By combining several free tools purpose by purpose, you can run a credible baseline SEO diagnostic and improvement cycle without paying for an enterprise platform. The recommended on-ramp is SEO Cheki at the center, supplemented as needed by other free tools — a cost-efficient entry point for serious SEO operations.
The most common pitfall for SEO Cheki beginners is treating the numbers as absolute truth — for example, believing that keyword frequency must hit a specific percentage, or that internal links must exceed a specific count. Modern Google ranking is not a simple mechanical formula; it weighs intent match, E-E-A-T (experience, expertise, authoritativeness, trustworthiness), user behavior signals, and the naturalness of context and co-occurring terms. Making the SEO Cheki numbers the goal in themselves degrades real user value and ends up hurting rankings as well.
The remedy is to position SEO Cheki as a snapshot for situational awareness and hypothesis generation, and to keep the ultimate evaluation axis on whether we are delivering the information searchers actually need, in the right structure and tone. The numbers are hints, not targets. Always ask why the number is what it is and how user experience changes if you alter it — that's the real way to use SEO Cheki.
SEO Cheki's search ranking is a real-time fetch at the moment of the query — impressive accuracy for a free tool — but it's still affected by the location, IP, personalization, and device (mobile vs PC) of the query, which can produce gaps versus what users actually see. Discrepancies like SEO Cheki says 5th, another tool says 8th, real users seem to see around 10th are not unusual.
The remedy is to anchor your rank truth on Search Console's Performance report and use SEO Cheki as a casual day-to-day check or for relative comparison against competitors. Search Console provides up to 16 months of average position data, smoothed across noise, which makes it the better base for strategic decisions. Treating SEO Cheki rankings as current snapshot and Search Console rankings as mid-term trend lets you use both without contradiction.
Another pitfall is trying to operate a serious SEO program on SEO Cheki alone, then hitting a ceiling. SEO Cheki is fundamentally a per-page snapshot tool — it does not handle full-site crawl status, comprehensive backlink data, competitor keyword extraction, content gap analysis, or detailed crawl error reporting that production SEO operations rely on.
The remedy is to position SEO Cheki as the tool for current-state checks and before/after spot checks, while making Search Console and GA4 mandatory complements and adding paid platforms like Ahrefs or Semrush in stages as the operation grows. Even for mid-sized sites, once monthly UU passes tens of thousands, adopting an Ahrefs or Semrush light plan for backlink monitoring and competitor analysis becomes worth its cost. Treat SEO Cheki + Search Console + GA4 as the basic three-tool kit, then add paid tools as scale and budget allow — that's the cost-balanced operating design.
SEO Cheki is a free online SEO diagnostic tool that returns SEO-related data for any URL in a single view, with no signup required and a generous 200-queries-per-day quota. It offers six main features — Site SEO Check, Search Ranking Check, Outbound Link Check, Keyword Frequency Check, Whois Information, and HTTP Header Information — and surfaces, in one view, the data points SEO practitioners reference daily: title, description, h1, indexed page counts, internal and external links, load time, domain age, and more.
The basic operation is dead simple: visit the official site, enter a URL, click Check. With the bookmarklet installed, you can diagnose any page you're viewing with a single click. Advanced workflows include sequential competitor audits, before/after rewrite comparisons, and multi-competitor spreadsheet matrices, all of which substantially raise the efficiency of day-to-day SEO operations.
At the same time, SEO Cheki is fundamentally a current-state snapshot tool. For production-grade SEO you also need Search Console (for search-result truth), GA4 (for post-visit user behavior), and dedicated platforms like Ahrefs or Semrush (for backlink and competitor keyword depth). Avoid the three common pitfalls — worshipping the numbers, overestimating ranking accuracy, and trying to run the whole program on SEO Cheki alone — and design a diagnostic and improvement cycle that centers on SEO Cheki while matching your operating phase and budget. As a free tool that returns this much data instantly, SEO Cheki deserves to be in every SEO practitioner's bookmark bar.
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