What powers ultrasrei.com?

Last seen Oct 2026 · 16 technologies across 12 categories

Advertising

Google AdSense
since Oct 2021

Analytics

Vercel Analytics
since Oct 2026

Cookie compliance

Funding Choices
since Aug 2026

Development

Turbopack
since Aug 2026

Font scripts

Google Font API
since Oct 2021

JavaScript frameworks

Next.js v16.2.1
since Aug 2026
Next.js App Router
since Aug 2026
React
since Aug 2026

Miscellaneous

Open Graph
since Nov 2022
Webpack
since Aug 2026

PaaS

Vercel
since Aug 2026

Performance

Priority Hints
since Aug 2026

Programming languages

Node.js
since Aug 2026

Security

HSTS
since Aug 2026
reCAPTCHA
since Nov 2022

UI frameworks

Tailwind CSS
since Aug 2026

AI Crawlers

Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Oct 2026.

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

See who blocks each AI crawler across the web

AI Crawlers

No AI crawlers blocked

Full breakdown

Audience

  • Japan

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

Core Web Vitals

LCP1.9 s
INP75 ms
CLS0
TTFB200 ms

Real user p75, Chrome UX Report, Sep 2026.

Page

  • Language: Japanese
  • CDN: Vercel
  • Weight: 0.9 MB · 70 requests
  • Structured data: JSON-LD, OpenGraph, Twitter Cards

Homepage as crawled by the HTTP Archive, Oct 2026.

Organisation

  • Industry: Software and apps (declares WebApplication)

From the homepage's own structured data (Oct 2026).

Infrastructure

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

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