Extension Tracker

Viewport Resizer: Ultimate Device Emulator & Website Testing Tool

80,000 users Rated 4.12 from 286 ratings Last updated 16 Dec 2025

By Malte Wassermann Live in the Chrome Web Store kapnjjcfcncngkadhpmijlkblpibdcgm Search Google ↗ Last checked 7 Nov 2026, 04:12 UTC

The listing

What the Chrome Web Store shows, as of the last check

Emulate devices, resize screens, and perfect your web design effortlessly with this cutting-edge testing and presentation tool.Summary from the listing
Developer
Malte Wassermann
Enhanced Safe Browsing
Trusted. What this means →
Category
Productivity › Developer Tools
First published
13 Sep 2013
Last updated
16 Dec 2025
Version
2.0.4
Size
134 KiB
Minimum Chrome
88
Languages
41 languages

Deutsch, English, Indonesia, Nederlands, Tiếng Việt, Türkçe, català, dansk, eesti, español, français, hrvatski, italiano, latviešu, lietuvių, magyar, norsk, polski, português (Brasil), português (Portugal), română, slovenčina, slovenščina, suomi, svenska, čeština, Ελληνικά, български, русский, српски, українська, עברית, العربية, فارسی, हिन्दी, ગુજરાતી, ไทย, 中文（中国）, 中文（台灣）, 日本語, 한국어

See Chrome Web Store page ↗ View its code or download CRX ↗
Users over time As shown on the Chrome Web Store
80KTracking began 27 Sep 202627 Sep4 Oct11 Oct18 Oct25 Oct1 Nov2026-09-27: 80,000 users2026-10-03: 80,000 users2026-10-10: 80,000 users2026-10-17: 80,000 users2026-10-23: 80,000 users2026-10-30: 80,000 users2026-11-07: 80,000 users80,00080KTracking began27 Sep11 Oct25 Oct2026-09-27: 80,000 users2026-10-03: 80,000 users2026-10-10: 80,000 users2026-10-17: 80,000 users2026-10-23: 80,000 users2026-10-30: 80,000 users2026-11-07: 80,000 users80K
Average rating
4.104.2027 Sep11 Oct25 Oct4.124.104.2027 Sep11 Oct25 Oct4.12
Number of ratings
28529027 Sep11 Oct25 Oct28628529027 Sep11 Oct25 Oct286
New version One point per check. Source: the extension's public Chrome Web Store listing.
Show the numbers
CheckedUsersRatingRatings
2026-11-0780,0004.12286
2026-10-3080,0004.12286
2026-10-2380,0004.12286
2026-10-1780,0004.07286
2026-10-1080,0004.21286
2026-10-0380,0004.21286
2026-09-2780,0004.21286
Users, 7 days
No change
since a week ago
Users, 30 days
No change
+0.0%
Rank
#1,862
by users, of 292,131 extensions
In its category
#170
of 30,442 in Developer Tools

What changed

Every change found on a check, newest first

No changes found since tracking began on 27 Sep 2026.

Developer history

Moves to another publisher account and new contact emails, newest first

No move to another account and no new contact email since tracking began on 27 Sep 2026.

We know contact emails only by a keyed hash, so they're never shown. Recent account and contact changes →

What it can access

From the extension's manifest, in plain language

Every websiteIt can read and change your data on all the sites you visit.
Sites
  • <all_urls>Every website
Browser features
  • activeTabThe tab you're on, only after you click the extension
  • declarativeNetRequestBlock or change network requests, using rules
  • scriptingRun scripts on sites it can reach
  • storageSave settings and data in your browser

About this data

Collected from the extension's public Chrome Web Store listing. It's checked every week, because it has 1,000 or more users, and again whenever a new version appears. Last checked 7 Nov 2026, 04:12 UTC; next check around 13 Nov 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “Viewport Resizer: Ultimate Device Emulator & Website Testing Tool” (kapnjjcfcncngkadhpmijlkblpibdcgm). Chrome Web Store data, last checked 2026-11-07. https://extensiontracker.com/extension/kapnjjcfcncngkadhpmijlkblpibdcgm. Accessed 2026-11-13.
BibTeX
@misc{extensiontracker_kapnjjcfcncngkadhpmijlkblpibdcgm,
  title   = {Viewport Resizer: Ultimate Device Emulator & Website Testing Tool (kapnjjcfcncngkadhpmijlkblpibdcgm)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-11-07},
  url     = {https://extensiontracker.com/extension/kapnjjcfcncngkadhpmijlkblpibdcgm},
  urldate = {2026-11-13}
}

The data is free to reuse under CC BY 4.0.

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