Website review qoj.io
QOJ - QOJ.ac
Generated on January 13 2026 21:52 PM
Old data? UPDATE !
The score is 39/100
SEO Content
Title
QOJ - QOJ.ac
Length : 12
Perfect, your title contains between 10 and 70 characters.
Description
Length : 0
Very bad. We haven't found meta description on your page. Use this free online meta tags generator to create description.
Keywords
Very bad. We haven't found meta keywords on your page. Use this free online meta tags generator to create keywords.
Og Meta Properties
This page does not take advantage of Og Properties. This tags allows social crawler's better structurize your page. Use this free og properties generator to create them.
Headings
| H1 | H2 | H3 | H4 | H5 | H6 |
| 2 | 0 | 2 | 0 | 0 | 0 |
- [H1] QOJ.ac
- [H1] QOJ
- [H3] Top solved
- [H3] Top contributors
Images
We found 0 images on this web page.
Good, most or all of your images have alt attributes.
Text/HTML Ratio
Ratio : 3%
This page's ratio of text to HTML code is below 15 percent, this means that your website probably needs more text content.
Flash
Perfect, no Flash content has been detected on this page.
Iframe
Great, there are no Iframes detected on this page.
SEO Links
URL Rewrite
Good. Your links looks friendly!
Underscores in the URLs
We have detected underscores in your URLs. You should rather use hyphens to optimize your SEO.
In-page links
We found a total of 19 links including 6 link(s) to files
| Anchor | Type | Juice |
|---|---|---|
| Login | Internal | Passing Juice |
| Register | Internal | Passing Juice |
| QOJ | Internal | Passing Juice |
| IOI 2026 China Team Selection: Current Scoreboard, Tasks & Prediction Game | Internal | Passing Juice |
| The 3rd Universal Cup Finals: Call for tasks | Internal | Passing Juice |
| 若还想与我相见 | Internal | Passing Juice |
| QOJ Change logs (2025 Dec) | Internal | Passing Juice |
| Judging environment of QOJ (2025 updated) | Internal | Passing Juice |
| All the Announcements…… | Internal | Passing Juice |
| View all | Internal | Passing Juice |
| View all | Internal | Passing Juice |
| العربية | Internal | Passing Juice |
| English | Internal | Passing Juice |
| 日本語 | Internal | Passing Juice |
| 简体中文 | Internal | Passing Juice |
| 繁體中文 | Internal | Passing Juice |
| QOJ 4.5.33.0.dev | External | Passing Juice |
| Based on UOJ - OpenSource Project | External | Passing Juice |
| Qingyu✨ | Internal | Passing Juice |
SEO Keywords
Keywords Cloud
problems qojac blogs login hack category contests register qoj submissions
Keywords Consistency
| Keyword | Content | Title | Keywords | Description | Headings |
|---|---|---|---|---|---|
| qoj | 3 |  |
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| qojac | 2 | |
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| login | 1 | |
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| register | 1 | |
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| contests | 1 | |
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Usability
Url
Domain : qoj.io
Length : 6
Favicon
Great, your website has a favicon.
Printability
We could not find a Print-Friendly CSS.
Language
Good. Your declared language is en.
Dublin Core
This page does not take advantage of Dublin Core.
Document
Doctype
HTML 5
Encoding
Perfect. Your declared charset is UTF-8.
W3C Validity
Errors : 0
Warnings : 0
Email Privacy
Great no email address has been found in plain text!
Deprecated HTML
Great! We haven't found deprecated HTML tags in your HTML.
Speed Tips
|
Attention! Try to avoid nested tables in HTML. |
|
Too bad, your website is using inline styles. |
|
Too bad, your website has too many CSS files (more than 4). |
|
Too bad, your website has too many JS files (more than 6). |
|
Perfect, your website takes advantage of gzip. |
Mobile
Mobile Optimization
|
Apple Icon |
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Meta Viewport Tag |
|
Flash content |
Optimization
XML Sitemap
Missing
Your website does not have an XML sitemap - this can be problematic.
A sitemap lists URLs that are available for crawling and can include additional information like your site's latest updates, frequency of changes and importance of the URLs. This allows search engines to crawl the site more intelligently.
Robots.txt
https://qoj.io/robots.txt
Great, your website has a robots.txt file.
Analytics
Missing
We didn't detect an analytics tool installed on this website.
Web analytics let you measure visitor activity on your website. You should have at least one analytics tool installed, but It can also be good to install a second in order to cross-check the data.
PageSpeed Insights
Device
Categories
Free SEO Testing Tool
Free SEO Testing Tool is a free SEO tool which provides you content analysis of the website.