design

Simplify with userscripts

Get customizable browser scripts. userscripts offers JavaScript tools for various platforms.
357 stars20 forksJavaScriptGuide quality 8/10Updated 7/26/2026100% free · open source
What it does

Greasemonkey userscripts allow you to customize the behavior of web pages by injecting custom JavaScript code, enabling you to automate tasks, modify page layouts, and enhance your browsing experience.

When to use it
  • When you want to automate repetitive tasks on a specific website
  • When you need to modify the layout or functionality of a web page for personal use
  • When you want to add custom features to a website that are not provided by the site's developers
Ready-to-paste prompt
To add a custom button to a webpage, use the following code: // @grant GM_addStyle
GM_addStyle('.custom-button { background-color: #4CAF50; color: #fff; padding: 10px 20px; border: none; border-radius: 5px; cursor: pointer; }');
Heads up: Make sure to specify the correct @include directive in the metadata block to match the URL of the webpage you want to modify, as shown in the example script: // @include https://www.example.com
Saves to your device
Use with Claude
New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

✅ Light setup

Installs with a command or two; your AI agent can do it for you.

Try it instantly — no install
Claude Code
mkdir -p ~/.claude/skills/userscripts && curl -fsSL https://workflowstacks.com/api/skills/userscripts/claude-skill -o ~/.claude/skills/userscripts/SKILL.md
Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)
claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

Quick Actions
Details
Creator
adamlui
Language
JavaScript
Category
design
Published
2/25/2017

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