What powers nbviewer.org?

Last seen Jun 2026 · 11 technologies across 9 categories

Analytics

Plausible
since Oct 2025

Caching

Varnish
since Dec 2021

CDN

Cloudflare
since Dec 2021
jsDelivr
since Feb 2023

JavaScript frameworks

RequireJS v2.1.22
since Dec 2021

JavaScript libraries

jQuery v3.7.1
since Dec 2021
Moment.js v2.8.4
since Dec 2021

Miscellaneous

HTTP/3
since Sep 2022

Security

HSTS
since Nov 2022

UI frameworks

Bootstrap v3.3.7
since Dec 2021

Web servers

TornadoServer v6.5.2
since Nov 2022

Top search keywords

KeywordPositionEst. monthly visits
nbviewer #2 42
pydeck #13 2
rioxarray #26 1
pydeck #23 1
deforestation map #63 1
bayesian networks python #79 0
word2vec-pytorch #29 0
conda install einops #29 0
unbalanced optimal transport #17 0
what is logit in machine learning #96 0
rna seq data analysis pipeline #68 0
stein's unbiased risk estimate #31 0
stein's unbiased risk estimate #29 0
notebook markdown #60 0
notebook file viewer #50 0
open ipynb online #67 0
open ipynb file online #67 0
python summarize #79 0
python bayesian network #80 0
jupyter notebook cell #68 0
jupyter markdown table #68 0
jupyter markdown cell #58 0
jupyter markdown cell #56 0
jupyter log #90 0
jupyter lab markdown #84 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.

Audience

  • 84% desktop
  • 15% phone
  • 2% tablet
  • United States
  • India
  • Japan
  • Germany
  • United Kingdom
  • Brazil

Countries where the site has Chrome traffic, strongest markets first.

Open Page Rank

6.82 / 10 · ranked #55,154 of all domains

328 referring domains · OpenPageRank

Search traffic

47 est. monthly organic visits (US)

40 keywords in Google's top 30

Core Web Vitals

LCP3.2 s
INP25 ms
CLS0
TTFB2300 ms

Real user p75, Chrome UX Report, Jun 2026.

Page

  • Language: English
  • CDN: Fastly
  • Weight: 1.1 MB · 26 requests

Homepage as crawled by the HTTP Archive, Jul 2026.

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