Websites using Preact (from a CDN)
Preact is a 3 kB alternative to React with the same API. About 2,956,326 websites in the PageSourceSearch index contain the code that reveals it; the 4 highest-ranked are listed below.
How is Preact (from a CDN) detected?
The page loads or imports preact from jsDelivr, unpkg, esm.sh or cdnjs. The discovery keyword is the exact bytes PageSourceSearch looks for in every stored page and script:
(cdn\.jsdelivr\.net/npm|unpkg\.com|esm\.sh|cdnjs\.cloudflare\.com/ajax/libs)/preact regex Search the index for it
A literal is matched byte for byte, case-sensitively. Combine it with another keyword, a domain, a kind or a date filter on the search page to narrow the list. About Preact (from a CDN)
Top 50 websites using Preact (from a CDN)
Ranked by the domain's position in the crawl's ranked list (Common Crawl harmonic centrality), highest first. view source opens the stored page or script with the match highlighted. Computed 2026-09-30 21:43:13 UTC; the list stopped short of 50 because the search's budget ran out.
| # | Website | Rank | Found in | |
|---|---|---|---|---|
| 1 | unpkg.com | 43 | html https://app.unpkg.com/[email protected]/files/src | view source profile |
| 2 | cdnjs.com | 3,095 | html https://cdnjs.com/libraries | view source profile |
| 3 | whitepages.com | 9,279 | html https://www.whitepages.com/ | view source profile |
| 4 | historylink.org | 15,116 | html https://historylink.org/ | view source profile |
How it appears in the source
From unpkg.com (html):
<script type="importmap">{"imports":{"preact":"https://unpkg.com/[email protected]/dist/preact.module.js","preact/hooks":"https://unpkg.com/[email protected]/hooks/dist/hooks.module.js","preact/jsx-runtime"
Questions about finding Preact (from a CDN)
- How does PageSourceSearch know a website uses Preact (from a CDN)?
- By the source itself: The page loads or imports preact from jsDelivr, unpkg, esm.sh or cdnjs. PageSourceSearch stores the raw HTML and first-party JavaScript of each crawled site and matches the keyword byte for byte, so every listed site's stored source contains it.
- Is this a complete list of websites using Preact (from a CDN)?
- No. The page lists the 50 highest-ranked sites in the index whose source holds the keyword, out of about 2,956,326 websites that do; the count is the index's estimate at the time the list was computed. Run the keyword as a search to page through all of them, or add a kind or date filter.
- How do I find websites that use Preact (from a CDN) together with another technology?
- Search for both keywords at once: several terms separated by spaces must all be found on the same site, or with the Same page toggle in the same page. For example (cdn\.jsdelivr\.net/npm|unpkg\.com|esm\.sh|cdnjs\.cloudflare\.com/ajax/libs)/preact with wp-content/plugins/ lists the WordPress sites that use Preact (from a CDN).