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JavaScript userscript

Open-source JavaScript projects categorized as userscript

Top 23 JavaScript userscript Projects

  1. KeepChatGPT

    这是一款提高ChatGPT的数据安全能力和效率的插件。并且免费共享大量创新功能,如:自动刷新、保持活跃、数据安全、取消审计、克隆对话、言无不尽、净化页面、展示大屏、拦截跟踪、日新月异、明察秋毫等。让我们的AI体验无比安全、顺畅、丝滑、高效、简洁。

    Project mention: ChatGPT Won't Let You Type Until Cloudflare Reads Your React State | news.ycombinator.com | 2026-03-29

    I was using KeepChatGPT[1] for a while back in 2023-2024, pre-Gemini-in-Google era, and I was fascinated as to how it was able to mask being a user without needing any API or help from the end user. I stopped using it after 2024 because 1) Gemini and 2) It breaks quite a lot. I did however, like how you had an option to push the AI panel to the right, if only Google even considers doing so.

    [1]: https://github.com/xcanwin/keepchatgpt

  2. SaaSHub

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  3. undiscord

    Undiscord - Delete all messages in a Discord server / channel or DM (Easy and fast) Bulk delete

  4. h5player

    This software supports all audio and video websites, such as TikTok, YouTube, Bilibili, TED, Instagram, Twitter, etc. Features include: variable playback speed, screen capture, video download, custom settings, and extensions, etc., providing you with a pleasant online audio and video playback experience.

  5. control-panel-for-twitter

    Browser extension which gives you more control over your Twitter timeline and adds missing features and UI improvements - for desktop and mobile

    Project mention: Control Panel for Twitter | news.ycombinator.com | 2025-12-18
  6. Simple-YouTube-Age-Restriction-Bypass

    A simple browser extension to bypass YouTube's age verification, disable content warnings and watch age restricted videos without having to sign in!

  7. GitHub-userscripts

    Userscripts to add functionality to GitHub

  8. maxurl

    Finds larger/original versions of images and videos

  9. firefox-scripts

    userChromeJS / autoconfig.js and extensions

    Project mention: 15 Years of Forking | news.ycombinator.com | 2026-03-30

    The hard fork was "Waterfox Classic", which just became unsustainable to maintain.

    Rather than support for XPI (which is just the packaging for Firefox webextensions), the current version of Waterfox does still support bootstrapped extensions - in theory anyone can still write one, with access to all the privileged JavaScript APIs typically not accessible to MV2/MV3 webextensions.

    It's not widely used though, there are two repos I'm aware of that take advantage of this:

    https://github.com/xiaoxiaoflood/firefox-scripts/tree/master...

    https://github.com/onemen/TabMixPlus/

  10. Stay

    Stay is a local userscript manager and an extension sample for Safari on iOS/iPadOS.

  11. SearchJumper

    Yet another awesome browser extension for switching search engines, search everything (selection text / image / link / find in page) on any engine with a simple right click or a variety of menus and shortcuts. Build with React & Material-UI. (WIP).

  12. beachpatrol

    🏝️ A CLI Tool to Automate Your Everyday Web Browser.

    Project mention: Beachpatrol: Browser's End-User Automation CLI Hub | news.ycombinator.com | 2026-03-08
  13. katakana-terminator

    A browser extension to convert gairaigo (Japanese loan words) back to English

  14. Tape-Operator

    Скрипт, превращающий IMDB, TMDB, Kinopoisk и Letterboxd в бесплатные онлайн - кинотеатры! 🎥

  15. IMDb-Scout-Mod

    Auto search for movie/series on torrent, usenet, ddl, subtitles, streaming, predb and other sites. Adds links to IMDb pages from hundreds various sites. Adds movies/series to Radarr/Sonarr. Adds external ratings from Metacritic, Rotten Tomatoes, Letterboxd, Douban, Allocine. Media Server indicators for Plex, Jellyfin, Emby. Dark theme/style for Reference View. Adds/Removes to/from Trakt's watchlist. Removes ads

  16. GoodTwitter2

    Userscript to modify the looks of twitter.com

  17. Chat-DeMod

    Tampermonkey/Greasemonkey script that hides the moderation results when communicating with Chat.

  18. uc.css.js

    A dark indigo CSS theme for Firefox and a large collection of privileged scripts to add new buttons, menus, behaviors and other opinionated features. The theme is similar to other userChrome stylesheets, but it's intended for use with an autoconfig loader like fx-autoconfig, since it uses JavaScript to implement its more functional features.

  19. HandyImage

    browser userscript (extension) which Shows just fullsize Image with hotkeys & without pop-ups on many image-hosting sites

  20. mpiv

    A fully reworked fork of Mouseover Popup Image Viewer

  21. ChatGPT Auto Refresh

    ↻ Keeps ChatGPT sessions fresh to avoid network errors + Cloudflare checks

  22. FirefoxCustomize

    Ryan 收集的 Firefox 个性化相关资源

  23. userscript-clean-twitter

    Bring back the peace on Twitter

  24. instagram-dm-unsender

    Userscript that allows you to mass unsend all your DMs on Instagram

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

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Index

What are some of the best open-source userscript projects in JavaScript? This list will help you:

# Project Stars
1 KeepChatGPT 14,889
2 undiscord 6,562
3 h5player 3,616
4 control-panel-for-twitter 2,536
5 Simple-YouTube-Age-Restriction-Bypass 2,411
6 GitHub-userscripts 1,998
7 maxurl 1,547
8 firefox-scripts 1,338
9 Stay 1,273
10 SearchJumper 1,084
11 beachpatrol 921
12 katakana-terminator 859
13 Tape-Operator 811
14 IMDb-Scout-Mod 557
15 GoodTwitter2 523
16 Chat-DeMod 479
17 uc.css.js 379
18 HandyImage 309
19 mpiv 235
20 ChatGPT Auto Refresh 207
21 FirefoxCustomize 197
22 userscript-clean-twitter 186
23 instagram-dm-unsender 185

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