atcoder.jp


Tags Whois Backlink & Rankings Speed Safety Headers Similar Sites Keywords H Tags
Tags Whois Rank Speed Safety Headers Similar Sites Keywords H Tags

atcoder.jp Website Info

atcoder.jp (AtCoder is a prominent online judge based in Japan, hosting regular programming contests such as Beginner Contests, Regular Contests, and Grand Contests. It provides a platform for programmers to improve their skills through challenging problems and participate in a global community of coders.) DNS looks Active and website looks Accessable. atcoder.jp Website SEMRush Rank is 724,982. According to Google, website speed score is 73/100 and FAST. Website looks safe for children. We detected the website language as en.
atcoder.jp


atcoder.jp Website Tags

Domain Status:
✓ Active
Is Site Accessable?:
✓ Yes
SSL(https):
✓ Yes
Accessable Url:
https://www.atcoder.jp
Title:
AtCoder - Japanese Competitive Programming Platform
Description:
AtCoder is a Japanese platform for competitive programming contests, offering a variety of contests and practice problems to enhance coding skills and problem-solving abilities.
Categories :
Marketing/Merchandising, Information Technology
External Links:
23
Internal Links:
52
Mobile Friendly?:
✓ Yes
Canonical URL:
[Not Set]
Language:
en
XML Sitemap:
✗ No
robots.txt:
✗ No
Favicon:
✓ Yes

atcoder.jp Domain & Whois Details

Refresh

atcoder.jp Backlinks & Rankings

SEMRush Rank:
724,982
Semrush Rank is a proprietary score that lets you find the domains that are getting the most traffic from organic search.
SEMRush Traffic:
1,803
Number of users expected to visit the website during the following month.
SEMRush Costs:
451
Estimated price of organic keywords in Google AdWords.
SEMRush URL Links:
3,646
Number of links to URL according to SemRush.
SEMRush Website Links:
2,523,337
Number of links to the website according to SemRush.
SEMRush Domain Links:
2,571,441
Number of links to SemRush Domain.
SEMRush Keywords In Top 100:
2,497
Number of keywords where site in Google's organic search top 100.

atcoder.jp Social Media

Facebook Comments:
117
Facebook Shares:
152
Facebook Reactions:
353

atcoder.jp Website Speed (Desktop)

Refresh
Overall Category:
FAST
The human readable speed "category"
Speed Index:
73
Speed Index shows how quickly the contents of a page are visibly populated. [Learn more about the Speed Index metric].
Cumulative Layout Shift (CLS):
0.03 (FAST)
The Cumulative Layout Shift (CLS) metric measures how much unexpected layout shifts affect the user experience on a page. These layout shifts occur when content moves around without prior user input. CLS
Time to First Byte (TTFB):
0.399 s (FAST)
TTFB (time to first byte) is the number of milliseconds it takes for a client’s browser to receive the first byte of the response from the web server. Usually, TTFB can be improved with faster hosting and server optimizations. TTFB
First Input Delay (FID):
2 ms (FAST)
First Input Delay (FID) measures the time from when the user interacts with your site for the first time (click a link, tap on a button, etc.) to the time when the browser is able to respond to that interaction. Google recommends keeping FID below 100ms for a good user experience. FID
First Contentful Paint (FCP):
1.235 s (FAST)
FCP (First Contentful Paint) measures the time from a user’s navigation to when the browser renders the first bit of content from the DOM. In other words, FCP marks the time at which the first text or image is painted for the user. According to PageSpeed Insights, FCP should occur in under 2 seconds. FCP
Interaction to Next Paint (INP):
27 ms (FAST)
Interaction to Next Paint (INP) is a web performance metric that measures user interface responsiveness – how quickly a website responds to user interactions like clicks or key presses. Specifically, it measures how much time elapses between a user interaction like a click or key press and the next time the user sees a visual update on the page. INP
Largest Contentful Paint (LCP):
1.387 s (FAST)
Largest Contentful Paint (LCP) is a metric that measures when the largest content in the viewport is rendered. It is used to measure how long it takes for the main content of your webpage to appear on the screen. Everything below 2.5s is considered good LCP time by PageSpeed Insights. LCP
Total Size:
360 KB
Total Size. Large network payloads cost users real money and are highly correlated with long load times.
Server Response Time:
934 ms
Initial server response time. Keep the server response time for the main document short because all other requests depend on it. [Learn more about the Time to First Byte metric](https://developer.chrome.com/docs/lighthouse/performance/time-to-first-byte/).
Final Url:
https://atcoder.jp/
Canonicalized and final URL for the document, after following page redirects (if any).
Last Date Checked:
5/31/2023 3:52:05 AM
The last time we checked this website.
Site Speed Check(Full)

atcoder.jp HTML Resources

Type
Request Count
Size
Total
50
360 KB
Script
23
211 KB
Third-party
16
87 KB
Image
14
63 KB
Font
3
47 KB
Stylesheet
5
29 KB
Document
2
7 KB
Other
3
1 KB
Media
0
0 KB

atcoder.jp Website Safety

Refresh
Last Check Date:
3/29/2023 8:32:29 AM
Fortiguard:
Information Technology
Mcafee Category:
Marketing/Merchandising
OpenDNS:
BeFirst
Cloudflare DNS:
OK
MyWot Child Safety:
99

atcoder.jp HTTP Headers

Refresh
Cache-Control :
no-cache, no-store, must-revalidate, private
Connection :
keep-alive
Content-Length :
35522
Content-Type :
text/html; charset=utf-8
Date :
Sat, 13 May 2023 09:18:50 GMT
expires :
Fri, 1 Jan 2010 00:00:00 GMT
Pragma :
no-cache
Server :
nginx
Set-Cookie :
REVEL_FLASH=; Path=/; HttpOnly; Secure,REVEL_SESSI
Vary :
Accept-Encoding
x-content-type-options :
nosniff
x-xss-protection :
1; mode=block


atcoder.jp W3C HTML Validation Check Now

Last Check Date:
5/27/2023 12:00:00 AM
Errors:
38
Warnings:
0
Info:
3
Check Live:
Check atcoder.jp HTML Errors

atcoder.jp Similar Sites

Website
Title
Rank
stopstalk.com stopstalk.com
StopStalk - Competitive Programming Dashboard & Community
3,805,626
icpc.global icpc.global
ICPC Global - International Collegiate Programming Contest
309,722
csacademy.com csacademy.com
CS Academy - Competitive Programming Practice and Contests
1,327,250
clist.by clist.by
Clist.by - Online Auction Platform for Gaming and Digital Items
cp-algorithms.com cp-algorithms.com
CP Algorithms - Competitive Programming & Coding Algorithms
145,268
Top atcoder.jp Alternatives

atcoder.jp Site Keywords

at coder
atcoder
atcoder jobs
atcoder problems
atcoder テストケース
coding contests
coding practice
competitive programming
Japan programming platform

atcoder.jp Site H Tags

Check Now
h3
Ranking
h3
Information
h3
About the situation where it is difficult to access the contest site
h3
AtCoder Regular Contest 162 Announcement
h3
Toyota Programming Contest 2023#3（AtCoder Beginner Contest 306） Announcement
h3
KYOCERA Programming Contest 2023（AtCoder Beginner Contest 305） Announcement
h3
ALGO ARTIS Programming Contest 2023（AtCoder Heuristic Contest 020） Announcement
h3
Tokio Marine & Nichido Fire Insurance Programming Contest 2023（AtCoder Beginner Contest 304) Announc
h3
Contest
h4
Permanent Contests
h4
Upcoming Contests
h4
Recent Contests

atcoder.jp Sites with Same Names

Website
Title
Rank
atcoder.com atcoder.com
atcoder.co.jp atcoder.co.jp
Company - AtCoder
atcoder.github.io atcoder.github.io
Site not found · GitHub Pages

What is SitesDB?

SitesDB is one of the largest databases of websites and domain names on the internet, with over 40 million entries and growing. For more than 12 years, we've been manually verifying and updating website and domain details, combining human expertise with AI-powered systems to ensure the accuracy and relevance of our data.

At SitesDB, we provide in-depth technical and useful information about websites and domains, including:

  • Website meta tags
  • Domain & WHOIS data
  • General backlink and ranking statistics
  • Social media engagement stats
  • Root page speed insights
  • Website content and HTML resources
  • Website safety and security details, sourced from multiple trusted security providers
  • HTTP headers analysis
  • HTML validation reports
  • Lists of similar websites and competitors
  • Website keyword analysis, including top traffic-driving keywords
  • Heading structure (H tags) breakdown
  • Domain variations across different TLDs (Top-Level Domains)

In addition to this data, SitesDB offers a suite of website analysis tools — including Chrome CRUX, Google Lighthouse, and our own AI-enhanced algorithms — to help identify alternative websites, direct competitors, and similar sites, all continuously refined through both automated systems and human review.