Growth signalNo paid features detectedMedium-risk permissions
Custom Site JS icon

Custom Site JS

Run your own (per url or domain) custom JavaScript on sites.

Users112Current public install base
Rating5.0Store average score
Reviews1Public review volume
Manifest versionV3Extension platform version
7-day growth+7Net users gained this week
7-day growth rate+6.67%Relative weekly velocity
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Trend

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User Growth Over Time

1051071101121142026年7月15日2026年7月18日2026年7月21日Latest: 112
Rating trend

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7-day rating change

Start
5.00
Latest
5.00
7-day rating change
0.00
4.904.955.005.055.102026年7月15日2026年7月18日2026年7月21日Latest: 5.00
2026年7月15日2026年7月21日
Growth overview

Daily, weekly, and monthly growth

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1-day growthDeclining
-1-0.89%
7-day growthGrowing
+7+6.67%
30-day growthGrowing
+2+1.82%
Technical snapshot

Version, languages, and crawl freshness

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Version1.0.2
ManifestV3
Size94.64KiB
Languages1English (United States)
Published
Store updated
Last crawled
English (United States)
Overview

Product summary

Review the store description, core capabilities, and common use cases.

Have you ever wished you could customize a website to your personal preferences every time you visited it?

Ever heard of a bookmarklet? Bookmarklets run JavaScript on a page for you when you click on the bookmark. But how inconvenient to have to click a bookmark every time you visit a site?

What if you could have your JavaScript simply run on the site as the page loads with no extra effort from you? That's what this extension is about.

Custom Site JS allows you to Add, Edit, or Delete snippets of custom JavaScript, that will automatically be run on a page for you based on a URL you provide. You can create as many as you like. The only limit is a maximum of 5 megabytes as the scripts are stored in your local storage.

Everything is stored and run locally. This extension will never make any kind of external web request, network requests, or in short send any of your information anywhere. The only way it will pass any information outside of your local environment is if you create a snippet of JavaScript that explicitly sends information somewhere.

Reviews

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Store average score5.0Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average5.0Average computed only from synced review bodies
Reviews with text1Synced review bodies
Total ratings / reviews1Chrome Web Store public rating/review count

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