What powers jsconf.jp?

Last seen Oct 2026 · 17 technologies across 14 categories

Caching

Varnish
since Jan 2022

CDN

Fastly
since Jan 2022

Development

Turbopack
since Jun 2026

Font scripts

Google Font API
since Jul 2019

JavaScript frameworks

Next.js v16.3.8
since Oct 2025
Next.js App Router
since Oct 2025
React
since Jan 2022

Maps

Google Maps
since Jul 2023

Miscellaneous

Open Graph
since Sep 2022
Webpack
since Jan 2022

PaaS

GitHub Pages
since Jan 2022

Performance

Priority Hints
since Oct 2025

Programming languages

Node.js
since Oct 2025

Security

HSTS
since Sep 2022

UI frameworks

Tailwind CSS
since Oct 2025

Video players

YouTube
since Apr 2026

Widgets

Google Plus
since Jul 2019

AI Crawlers

No robots.txt, so all AI crawlers are allowed by default. Checked Nov 2026.

  • robots.txt not found
  • llms.txt not found
  • ai.txt not found

See who blocks each AI crawler across the web

Top search keywords

KeywordPositionEst. monthly visits
js conference #18 1
wintertc #30 0
taiga github #67 0
node.js conferences #39 0
javascript conferences 2025 #24 0
js conferences 2024 #32 0

The site's top keywords in Google (US), with the visits each one is estimated to bring per month.

Top backlinks

Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.

AI Crawlers

No robots.txt, all AI crawlers allowed

Full breakdown

Audience

  • 78% desktop
  • 22% phone
  • Japan

Where the site's Chrome visitors come from, largest estimated audience first.

Open Page Rank

5.64 / 10 · ranked #142,056 of all domains

88 referring domains · OpenPageRank

Search traffic

1 est. monthly organic visits (US)

6 keywords in Google's top 30

Core Web Vitals

LCP1.2 s
INP25 ms
CLS0
TTFB300 ms

Real user p75, Chrome UX Report, Sep 2026.

Page

  • Language: English
  • CDN: Fastly
  • Weight: 1.9 MB · 62 requests

Homepage as crawled by the HTTP Archive, Oct 2026.

Infrastructure

  • Hosted on Fastly (185.199.108.153)
  • Email: no MX record returned
  • SSL: Let's Encrypt, RSA 2048, expires Jan 2027
  • Common Crawl link graph: rank 1,917,855, 2 hosts
  • Verified with: Google

DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted

Subdomains

HostTechs
jsconf.jp 15
www.jsconf.jp 2

Full technology history →
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