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Sites built with Epub.js

JavaScript library for rendering EPUB documents in the browser.

#462 of 1098 in Javascript Library First seen: Jun 28, 2026 Last seen: Sep 2, 2026 Website: github.com

22 sites

16 found by StackScope, 6 via launch platforms

StackScope Discovery (Indie) 8 StackScope Wider Web 8 Product Hunt 4 Hacker News 1 PeerPush 1
  • StackScope Discovery (Indie) 8
  • StackScope Wider Web 8
  • Product Hunt 4
  • Hacker News 1
  • PeerPush 1
View: All sites All launches Launch platforms StackScope Discovery StackScope Wider Web
Last 7 days 0.0% +0.0pp
Most used with JSZip, Cloudflare, Google Fonts
Top product types Productivity, Content, AI

Epub.js has been detected on 22 launches we've crawled. Most recent detection: FileFlot - Document Hub & Speed Test, 2 days ago.

It's most commonly paired with JSZip, Cloudflare, and Google Fonts. By product type, the launches using it are most often Productivity (42%), Content (33%), and AI (8%).

What kind of products ship with Epub.js

12 launches

Productivity
41.67%
Content
33.33%
AI
8.33%
Education
8.33%
Finance
8.33%

Domain endings using Epub.js

22 sites

  • .com 36.36%
  • .app 13.64%
  • .online 13.64%
  • .io 9.09%
  • .forum 4.55%

Share of new sites using Epub.js

Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.

0.0%
last 7 days
+0.0pp vs prior week
0.0%
September so far
1 of 278,670 sites
22
sites all time
since Jun 2026
Epub.js daily detection trend Before 8 July 2026: launch platforms only. We began crawling the wider web on this date, so the cohort this share is measured against changes here. 5% 2% 0% Jul Aug Sep Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery. Jun 21 · 0 / 383 = 0.0% Jun 22 · 0 / 576 = 0.0% Jun 23 · 0 / 900 = 0.0% Jun 24 · 0 / 737 = 0.0% Jun 25 · 0 / 618 = 0.0% Jun 26 · 0 / 534 = 0.0% Jun 27 · 0 / 431 = 0.0% Jun 28 · 1 / 383 = 0.3% Jun 29 · 0 / 503 = 0.0% Jun 30 · 1 / 801 = 0.1% Jul 1 · 0 / 795 = 0.0% Jul 2 · 0 / 604 = 0.0% Jul 3 · 0 / 499 = 0.0% Jul 4 · 0 / 411 = 0.0% Jul 5 · 0 / 367 = 0.0% Jul 6 · 0 / 551 = 0.0% Jul 7 · 0 / 1172 = 0.0% Jul 8 · 0 / 12591 = 0.0% Jul 9 · 0 / 23752 = 0.0% Jul 10 · 0 / 22553 = 0.0% Jul 11 · 0 / 15988 = 0.0% Jul 12 · 0 / 20294 = 0.0% Jul 13 · 0 / 20929 = 0.0% Jul 14 · 0 / 20417 = 0.0% Jul 15 · 0 / 17248 = 0.0% Jul 16 · 1 / 14268 = 0.0% Jul 17 · 0 / 19731 = 0.0% Jul 18 · 0 / 22708 = 0.0% Jul 19 · 0 / 26089 = 0.0% Jul 20 · 1 / 22591 = 0.0% Jul 21 · 0 / 21662 = 0.0% Jul 22 · 0 / 23209 = 0.0% Jul 23 · 0 / 16877 = 0.0% Jul 24 · 1 / 12859 = 0.0% Jul 25 · 0 / 8951 = 0.0% Jul 26 · 0 / 19988 = 0.0% Jul 27 · 0 / 33889 = 0.0% Jul 28 · 0 / 38231 = 0.0% Jul 29 · 0 / 50128 = 0.0% Jul 30 · 0 / 43972 = 0.0% Jul 31 · 2 / 51147 = 0.0% Aug 1 · 0 / 50534 = 0.0% Aug 2 · 0 / 49755 = 0.0% Aug 3 · 0 / 48272 = 0.0% Aug 4 · 2 / 37367 = 0.0% Aug 5 · 0 / 32721 = 0.0% Aug 6 · 1 / 36608 = 0.0% Aug 7 · 1 / 37906 = 0.0% Aug 8 · 0 / 39701 = 0.0% Aug 9 · 0 / 34235 = 0.0% Aug 10 · 0 / 28887 = 0.0% Aug 11 · 1 / 32046 = 0.0% Aug 12 · 0 / 33513 = 0.0% Aug 13 · 0 / 49980 = 0.0% Aug 14 · 1 / 51459 = 0.0% Aug 15 · 1 / 51545 = 0.0% Aug 16 · 0 / 51873 = 0.0% Aug 17 · 1 / 41475 = 0.0% Aug 18 · 0 / 53972 = 0.0% Aug 19 · 1 / 49562 = 0.0% Aug 20 · 0 / 66973 = 0.0% Aug 21 · 0 / 90481 = 0.0% Aug 22 · 0 / 91574 = 0.0% Aug 23 · 0 / 90309 = 0.0% Aug 24 · 0 / 78988 = 0.0% Aug 25 · 0 / 69442 = 0.0% Aug 26 · 0 / 65229 = 0.0% Aug 27 · 0 / 83546 = 0.0% Aug 28 · 1 / 83454 = 0.0% Aug 29 · 3 / 84376 = 0.0% Aug 30 · 0 / 92687 = 0.0% Aug 31 · 1 / 90237 = 0.0% Sep 1 · 0 / 91309 = 0.0% Sep 2 · 1 / 96696 = 0.0% Sep 3 · 0 / 90665 = 0.0%
Jun 21, 2026 75 days Sep 3, 2026

The shaded part of the chart is measured against a different set of sites. Until 8 July 2026 we only tracked launches from launch platforms; from that date we crawl the wider web as well. The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.

How StackScope detects technologies

⋮ Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery.

Javascript Library leaders

Tool % of launches % of category
#1 – jQuery 14.33% 34.50%
#2 – React Router 6.77% 16.30%
#3 – Motion 6.67% 16.07%
#4 – TanStack Router 4.25% 10.23%
#5 – Swiper 3.62% 8.72%
…
#462 ▼64 Epub.js Current page <0.01% <0.01%

Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Javascript Library tool.Among August launches it ranked #479 in Javascript Library, down from #415 in July. All 1098 in Javascript Library →

Often used with

Tool Sites
JSZip 11
Cloudflare 9
Google Fonts 9
Tailwind CSS 9
HSTS 9

Tools most often detected on the same sites as Epub.js.

Recent launches we can show

14 of the 22 sites using Epub.js are product launches we list individually. The other 8 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works

FileFlot - Document Hub & Speed Test Sep 2, 2026 Productivity FlipReader - Free flippable PDF and EPUB online reader Aug 29, 2026 Productivity Offline Book Reader — Free Private EPUB, PDF & TXT Reader Aug 29, 2026 AI PhonoLeaf — Turn your ebooks into audiobooks Aug 19, 2026 Content Screenshot of LingoGym, a launch using Epub.js LingoGym Aug 11, 2026 · score 4.5 Screenshot of ReadAlly, a launch using Epub.js ReadAlly Aug 6, 2026 · score 7.0 Education Inbox - Outbook Aug 4, 2026 Productivity Screenshot of Read 3x, a launch using Epub.js Read 3x Jul 31, 2026 · score 1.3 Screenshot of Nexus Calculator, a launch using Epub.js Nexus Calculator Jul 31, 2026 · score 9.5 Productivity useformat — free file conversion, private in your browser Jul 24, 2026 Productivity Kentro 啃透｜AI 深度阅读与文档理解工具 Jul 20, 2026 Content Chasing the Sun Jul 16, 2026 Content

Showing the most recent 12 of 14.

The StackScope API serves all 22 sites using Epub.js, filterable and exportable, from £15 a month.

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.