Generated on April 09 2026 21:50 PM
Old data? UPDATE !
The score is 62/100
Title
Trang chủ - VNOJ: VNOI Online Judge
Length : 35
Perfect, your title contains between 10 and 70 characters.
Description
VNOJ - Online Judge chính thức của VNOI.
Length : 40
Ideally, your meta description should contain between 70 and 160 characters (spaces included). Use this free tool to calculate text length.
Keywords
VNOJ, VOI, VNOI, HSG, HSG tin học, VOJ, SPOJ, VO, OJ, online judge, Viet Nam online judge, programming, code, contest
Good, your page contains meta keywords.
Og Meta Properties
Good, your page take advantage of Og Properties.
| Property | Content |
|---|---|
| image | https://oj.vnoi.info/logo.png |
| site_name | VNOJ: VNOI Online Judge |
| url | https://oj.vnoi.info/ |
| description | VNOJ - Online Judge chính thức của VNOI. |
Headings
| H1 | H2 | H3 | H4 | H5 | H6 |
| 0 | 10 | 6 | 0 | 0 | 0 |
Images
We found 43 images on this web page.
39 alt attributes are empty or missing. Add alternative text so that search engines can better understand the content of your images.
Text/HTML Ratio
Ratio : 47%
Ideal! This page's ratio of text to HTML code is between 25 and 70 percent.
Flash
Perfect, no Flash content has been detected on this page.
Iframe
Great, there are no Iframes detected on this page.
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 97 links including 2 link(s) to files
| Anchor | Type | Juice |
|---|---|---|
| Trang chủ | Internal | Passing Juice |
| Danh sách bài | Internal | Passing Juice |
| Các bài nộp | Internal | Passing Juice |
| Tổ chức | Internal | Passing Juice |
| Các kỳ thi | Internal | Passing Juice |
| Wiki | Internal | Passing Juice |
| FAQ | Internal | Passing Juice |
| Trình chấm ngoài | Internal | Passing Juice |
| Tag | Internal | Passing Juice |
| Máy chấm | Internal | Passing Juice |
| Devlog | Internal | Passing Juice |
| Github | External | Passing Juice |
| Tickets | Internal | Passing Juice |
| Thư viện đề thi | External | Passing Juice |
| Đề xuất contest | External | Passing Juice |
| Tạp chí | Internal | Passing Juice |
| VNOI | Internal | noFollow |
| DMOJ | External | noFollow |
| VOJ | External | noFollow |
| đăng ký | Internal | Passing Juice |
| A cộng B | Internal | Passing Juice |
| VNOI Wiki: Tham lam | Internal | Passing Juice |
| dvtd | Internal | Passing Juice |
| VNOI Wiki | Tham lam | Internal | Passing Juice |
| dnx04 | Internal | Passing Juice |
| minhnhatnoe | Internal | Passing Juice |
| unknownnaciul | Internal | Passing Juice |
| KAKOII | Internal | Passing Juice |
| VNOI Wiki: Kỹ thuật sinh test | Internal | Passing Juice |
| Kỹ thuật sinh test, tự kiểm tra code | VNOI Wiki | Internal | Passing Juice |
| minhcool | Internal | Passing Juice |
| Monarchuwu | Internal | Passing Juice |
| ngtmanh | Internal | Passing Juice |
| Dự án sinh test các kì thi chính thức: Kỳ thi chọn đội tuyển HSGQG THPT tỉnh Quảng Trị (2024-25) | Internal | Passing Juice |
| Kỳ thi chọn Đội tuyển HSGQG Quảng Trị năm 2024-2025 | Internal | Passing Juice |
| Educational Prefix Sum & Differential Array Contest | Internal | Passing Juice |
| Educational Prefix Sum & Differential Array Contest - Part 1 | Internal | Passing Juice |
| Educational Prefix Sum & Differential Array Contest - Part 2 | Internal | Passing Juice |
| Chung kết VNOI CUP 2025: Livestream bình luận & thời gian bắt đầu chung kết | Internal | Passing Juice |
| ntkwan | Internal | Passing Juice |
| fanpage VNOI | External | Passing Juice |
| Bảng mở rộng | Internal | Passing Juice |
| Mirror | Internal | Passing Juice |
| Chung kết VNOI CUP 2025: Địa điểm thi & Bảng mở rộng | Internal | Passing Juice |
| Form đăng ký | External | Passing Juice |
| VNOI CUP 2025 – NHÀ TÀI TRỢ ĐỒNG: CÔNG TY TNHH WEB3 VIỆT NAM | Internal | Passing Juice |
| VNOI CUP 2025 – NHÀ TÀI TRỢ ĐỒNG: CÔNG TY CỔ PHẦN CÔNG NGHỆ PHYGITAL LABS | Internal | Passing Juice |
| https://phygitallabs.io/en/careers | External | Passing Juice |
| https://phygitallabs.io/ | External | Passing Juice |
| https://nomion.io/ | External | Passing Juice |
| VNOI CUP 2025 – NHÀ TÀI TRỢ BẠC: CÔNG TY CỔ PHẦN CÔNG NGHỆ SOTATEK VIỆT NAM | Internal | Passing Juice |
| VNOI CUP 2025 - DANH SÁCH THÍ SINH NHẬN ÁO | Internal | Passing Juice |
| các thí sinh đủ điều kiện nhận áo VNOI CUP 2025 | External | Passing Juice |
| form | External | Passing Juice |
| 2 | Internal | Passing Juice |
| 3 | Internal | Passing Juice |
| 4 | Internal | Passing Juice |
| 5 | Internal | Passing Juice |
| 6 | Internal | Passing Juice |
| 21 | Internal | Passing Juice |
| 22 | Internal | Passing Juice |
| Kỳ thi chọn Đội tuyển HSGQG TPHCM năm 2025 | Internal | Passing Juice |
| fextivity | Internal | Passing Juice |
| hollwo_pelw | Internal | Passing Juice |
| Hollowed | Internal | Passing Juice |
| marvinthang | Internal | Passing Juice |
| Xem đầy đủ >>> | Internal | Passing Juice |
| dquynh_2811 | Internal | Passing Juice |
| I_love_Hoang_Yen | Internal | Passing Juice |
| Mike4235 | Internal | Passing Juice |
| PhuocThien | Internal | Passing Juice |
| Xem đầy đủ >>> | Internal | Passing Juice |
| toquyen260288 | Internal | Passing Juice |
| Bedao Regular Contest 18 - DIV | Internal | Passing Juice |
| ToniKroos | Internal | Passing Juice |
| Atcoder Educational DP Contest A - Frog 1 | Internal | Passing Juice |
| A cộng B | Internal | Passing Juice |
| Hướng giải cho Bedao Regular Contest 16 - Đá thủ | Internal | Passing Juice |
| pt48583994 | Internal | Passing Juice |
| Olympic Sinh Viên 2025 - Chuyên tin - DÃY NGẮN NHẤT | Internal | Passing Juice |
| nguyenminhtuaan | Internal | Passing Juice |
| HSG THPT Thanh Hóa 2021 - Covid-19 | Internal | Passing Juice |
| Thảm kịch ở nông trang | Internal | Passing Juice |
| k32_duclong | Internal | Passing Juice |
| Duyên Hải 2020 - Lớp 10 - Bài 2 - Số chính phương | Internal | Passing Juice |
| Harry_Wright_1 | Internal | Passing Juice |
| VOI 26 Bài 4 - Tất niên | Internal | Passing Juice |
| Atcoder Educational DP Contest L - Deque | Internal | Passing Juice |
| Atom | Internal | Passing Juice |
| TST 2025 - Bài 6 | Internal | Passing Juice |
| TST 2025 - Bài 5 | Internal | Passing Juice |
| TST 2025 - Bài 4 | Internal | Passing Juice |
| TST 2025 - Bài 3 | Internal | Passing Juice |
| TST 2025 - Bài 2 | Internal | Passing Juice |
| TST 2025 - Bài 1 | Internal | Passing Juice |
| Dò mìn | Internal | Passing Juice |
| Atom | Internal | Passing Juice |
Keywords Cloud
sinh cup vnoi những trong công thi các bài bạn
Keywords Consistency
| Keyword | Content | Title | Keywords | Description | Headings |
|---|---|---|---|---|---|
| các | 60 | ![]() |
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| vnoi | 56 | ![]() |
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| thi | 39 | ![]() |
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| công | 38 | ![]() |
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| trong | 37 | ![]() |
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Url
Domain : vnoi.info
Length : 9
Favicon
Great, your website has a favicon.
Printability
We could not find a Print-Friendly CSS.
Language
Good. Your declared language is vi.
Dublin Core
This page does not take advantage of Dublin Core.
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
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Attention! Try to avoid nested tables in HTML. |
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Too bad, your website is using inline styles. |
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Great, your website has few CSS files. |
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Too bad, your website has too many JS files (more than 6). |
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Perfect, your website takes advantage of gzip. |
Mobile Optimization
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Apple Icon |
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Meta Viewport Tag |
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Flash content |
XML Sitemap
Great, your website has an XML sitemap.
| https://oj.vnoi.info/ |
Robots.txt
https://vnoi.info/robots.txt
Great, your website has a robots.txt file.
Analytics
Great, your website has an analytics tool.
Google Analytics |
Free SEO Testing Tool is a free SEO tool which provides you content analysis of the website.