Customaise | The web wasn't built for you. Fix that.

Customaise is a free Chrome extension for UserScripts and AgentScripts. Rewrite any website in plain language. Open every site you're signed into to your AI agent. Every change is local, reversible, and versioned.

How It Works

Describe the change in plain language. Customaise writes a reversible tweak under the hood, applies it to the live page, and brings it back every time you return. Author AgentScripts the same way to teach your AI agent new tools on the sites you already use.

Key Features

• UserScripts in plain language: describe the change, Customaise writes it, you approve it
• AgentScripts for your AI: typed, consent-gated tools your agent can call on any site you're signed into
• Script Editor: full Monaco-powered editor with syntax highlighting and version history
• Cross-Device Sync: keep UserScripts and AgentScripts in sync across browsers
• MCP Server for your IDE: expose your browser session to Cursor, Claude Code, and other MCP clients
• Local-first: scripts run in your browser, your session stays yours

Pricing

Start free with 200K monthly in-browser AI tokens. Upgrade to Power User for unlimited in-browser AI with your own key, cross-device sync, and the MCP Server for your IDE.

Get Started

Add Customaise to Chrome for free and start reshaping the web to fit you.