Customaise: AI Userscript & Agentscript Manager. Powered by MCP & WebMCP

Custom programmable tools for every open tab. For you, or for your AI.

As of June 2026, Customaise: AI Userscript & Agentscript Manager. Powered by MCP & WebMCP has 14 users in the Developer Tools category.

Usersup 250.0 percent+250.0%
14
14
Ratingno change0%
— reviews
Reviewsno change0%
Version
1.2.8
Manifest V3
90-day change · In the last 90 days this extension 10 version updates, changed permissions.

History

11 snapshots

Tracking since Apr 1, 2026.

17.1290.879999999999999Apr 1, 2026Jun 9, 2026
View as table
DateUsersRatingReviewsVersion
Apr 1, 202641.1.6
Apr 9, 202621.1.7
Apr 20, 202661.1.9
Apr 26, 202651.1.9
May 4, 2026121.2.1
May 9, 2026131.2.2
May 14, 2026141.2.3
May 20, 2026161.2.4
May 27, 2026141.2.5
Jun 3, 2026121.2.6
Jun 9, 2026131.2.7
Now141.2.8

Changelog

  • Jun 3, 2026
    description
    Rewrite any website in plain language. Open every website to your AI agent.
    
    Customaise is a Chrome extension that does both.
    
    
    You already know what you want.
    
    The button is three menus deep. The export doesn't exist. The dark mode was never shipped. Your agent can't finish the workflow, submit the form, or touch the admin panel.
    
    You've learned to live with it.
    
    
    What if you could just say to fix it?
    
    You can. You see a problem. You describe it. It gets fixed. Every time you come back.
    
    
    🟢 ONE EXTENSION. TWO PATHS. UNLIMITED SOLUTIONS.
    
    Pick the shape that fits the problem. Stack them on any page.
    
    ✅ For you. Reshape any page. Inbox that dims promotions. Feed that kills the sidebar. CRM that sorts itself. Every fix becomes a UserScript in your library, running on your sites, following you across devices. The userscript manager that writes itself.
    
    ✅ For your agent. Create any tool. Archive the inbox. Place the trade. Export the lead. Book the flight. AgentScripts turn any page into named tools for browser automation, called in milliseconds through WebMCP, under your own session.
    
    
    🟢 CONNECT YOUR IDE
    
    Customaise exposes 18 tools through MCP, covering script lifecycle, tab control, browser context, visual DOM targeting, and WebMCP calls with HITL consent. Any MCP-compatible coding agent can call them. Uses your IDE's AI subscription, not ours.
    
    
    🟢 UNDER YOUR CONTROL
    
    Every capability a script or agent uses is declared up front and enforced by the extension.
    
    ✅ Allow, prompt, or deny per tool. Sensitive calls wait for your explicit OK.
    ✅ Approve from the tab, or from your phone if you're away from your desk.
    ✅ @grant gates the GM_* API surface. @connect allowlists network hosts. SRI covers third-party code in @require and @resource.
    ✅ Every edit creates a restore point. Unlimited undo.
    
    
    🟢 SHARE WHAT YOU BUILD
    
    Publish any script from your Account Portal. Each one gets a dedicated install page you can share. Public listings, private invite links, or links for teams and clients. Subscribers get automatic updates as you improve.
    
    
    🟢 PRIVACY FIRST
    
    In-browser AI runs on paid Gemini APIs. When you connect your IDE through MCP, it uses your IDE's AI subscription instead. Your prompts never train a model. Conversations encrypted on your device with AES-256-GCM. Your key, your control.
    
    
    🟢 READY WHEN YOU ARE
    
    One minute to install. One sentence to make your first fix.
    
    
    🟢 LINKS
    
    Website: https://customaise.com
    Learn UserScripts: https://customaise.com/learn/userscripts
    Learn AgentScripts: https://customaise.com/learn/agentscripts
    Pricing: https://customaise.com/pricing
    Report bugs: https://github.com/getcustomaise/feedback/issues
    Changelog: https://github.com/getcustomaise/feedback/blob/main/CHANGELOG.md
    
    Chrome Manifest V3. 21 languages supported.
    Your AI writes the tool. Customaise runs it. No API keys, no OAuth, no headless browser. Just the Chrome you're already in.
    
    
    You already know what you want.
    
    The button is three menus deep. The export doesn't exist. The dark mode was never shipped. Your agent can't finish the workflow, submit the form, or touch the admin panel.
    
    You've learned to live with it.
    
    
    What if you could just say to fix it?
    
    You can. You see a problem. You describe it. It gets fixed. Every time you come back.
    
    
    🟢 ONE EXTENSION. TWO PATHS. UNLIMITED SOLUTIONS.
    
    Pick the shape that fits the problem. Stack them on any page.
    
    ✅ For you. Reshape any page. Inbox that dims promotions. Feed that kills the sidebar. CRM that sorts itself. Every fix becomes a UserScript in your library, running on your sites, following you across devices. The userscript manager that writes itself.
    
    ✅ For your AI. Create any tool. Archive the inbox. Place the trade. Export the lead. Book the flight. AgentScripts turn any page into named tools for browser automation, called in milliseconds through WebMCP, under your own session.
    
    
    🟢 CONNECT YOUR AGENT
    
    Customaise exposes 18 tools through MCP, covering script lifecycle, tab control, browser context, visual DOM targeting, and WebMCP calls with HITL consent. Any MCP-compatible coding agent can call them. Uses your IDE's AI subscription, not ours.
    
    
    🟢 FREE ON-DEVICE AI
    
    Chrome 148+ ships with built-in Gemini Nano via the Prompt API. Pick Nano as the model in Chat, or call it from any script via @grant CM_promptAI. No API key. Your prompts never leave your machine. No per-call cost. Works offline once the model is provisioned.
    
    
    🟢 UNDER YOUR CONTROL
    
    Every capability a script or agent uses is declared up front and enforced by the extension.
    
    ✅ Allow, prompt, or deny per tool. Sensitive calls wait for your explicit OK.
    ✅ Approve from the tab, or from your phone if you're away from your desk.
    ✅ @grant gates the GM_* API surface. @connect allowlists network hosts. SRI covers third-party code in @require and @resource.
    ✅ Chrome DevTools Access is off by default and resets every Chrome restart. Scripts that declare @grant CM_devtools only reach the debugger when you turn the toggle on; Chrome shows its yellow banner while a session is held.
    ✅ Every edit creates a restore point. Unlimited undo.
    
    
    🟢 SHARE WHAT YOU BUILD
    
    Publish any script from your Account Portal. Each one gets a dedicated install page you can share. Public listings, private invite links, or links for teams and clients. Subscribers get automatic updates as you improve.
    
    
    🟢 PRIVACY FIRST
    
    In-browser AI runs on paid Gemini APIs, or pick the on-device Gemini Nano model in Chat (Chrome 148+) to keep your prompts entirely on your machine. Scripts you write can also call on-device AI directly via `@grant CM_promptAI`. When you connect your IDE through MCP, it uses your IDE's AI subscription instead. Your prompts never train a model. Conversations encrypted on your device with AES-256-GCM. Your key, your control.
    
    
    🟢 READY WHEN YOU ARE
    
    One minute to install. One sentence to make your first fix.
    
    
    🟢 LINKS
    
    Website: https://customaise.com
    Learn UserScripts: https://customaise.com/learn/userscripts
    Learn AgentScripts: https://customaise.com/learn/agentscripts
    Pricing: https://customaise.com/pricing
    Report bugs: https://github.com/getcustomaise/feedback/issues
    Changelog: https://github.com/getcustomaise/feedback/blob/main/CHANGELOG.md
    
    Chrome Manifest V3.
  • Jun 3, 2026
    short_description
    The web wasn't built for you. Fix that. Plain-language changes for you. Page tools for your AI.
    Custom programmable tools for every open tab. For you, or for your AI.
  • May 27, 2026
    permissions
    storage, unlimitedStorage, scripting, userScripts, alarms, offscreen, webNavigation, notifications, clipboardWrite, downloads, tabs, activeTab, contextMenus, cookies, identity
    storage, unlimitedStorage, scripting, userScripts, alarms, offscreen, webNavigation, notifications, clipboardWrite, downloads, tabs, activeTab, contextMenus, cookies, identity, debugger
  • May 20, 2026
    description
    Rewrite any website in plain language. Open every website to your AI agent.
    
    Customaise is a Chrome extension that does both.
    
    
    You already know what you want.
    
    The button is three menus deep. The export doesn't exist. The dark mode was never shipped. Your agent can't finish the workflow, submit the form, or touch the admin panel.
    
    You've learned to live with it.
    
    
    What if you could just say to fix it?
    
    You can. You see a problem. You describe it. It gets fixed. Every time you come back.
    
    
    🟢 ONE EXTENSION. TWO PATHS. UNLIMITED SOLUTIONS.
    
    Pick the shape that fits the problem. Stack them on any page.
    
    ✅ For you. Reshape any page. Inbox that dims promotions. Feed that kills the sidebar. CRM that sorts itself. Every fix becomes a UserScript in your library, running on your sites, following you across devices. The userscript manager that writes itself.
    
    ✅ For your agent. Create any tool. Archive the inbox. Place the trade. Export the lead. Book the flight. AgentScripts turn any page into named tools for browser automation, called in milliseconds through WebMCP, under your own session.
    
    
    🟢 CONNECT YOUR IDE
    
    Cursor, Claude Code, Codex, Antigravity, Kiro, and Windsurf plug straight into Customaise. 18 tools for script lifecycle, tab control, browser context, visual DOM targeting, and WebMCP calls with HITL consent. Uses your IDE's AI subscription, not ours.
    
    
    🟢 UNDER YOUR CONTROL
    
    Every capability a script or agent uses is declared up front and enforced by the extension.
    
    ✅ Allow, prompt, or deny per tool. Sensitive calls wait for your explicit OK.
    ✅ Approve from the tab, or from your phone if you're away from your desk.
    ✅ @grant gates the GM_* API surface. @connect allowlists network hosts. SRI covers third-party code in @require and @resource.
    ✅ Every edit creates a restore point. Unlimited undo.
    
    
    🟢 SHARE WHAT YOU BUILD
    
    Publish any script from your Account Portal. Each one gets a dedicated install page you can share. Public listings, private invite links, or links for teams and clients. Subscribers get automatic updates as you improve.
    
    
    🟢 PRIVACY FIRST
    
    In-browser AI runs on paid Gemini APIs. When you connect your IDE through MCP, it uses your IDE's AI subscription instead. Your prompts never train a model. Conversations encrypted on your device with AES-256-GCM. Your key, your control.
    
    
    🟢 READY WHEN YOU ARE
    
    One minute to install. One sentence to make your first fix.
    
    
    🟢 LINKS
    
    Website: https://customaise.com
    Learn UserScripts: https://customaise.com/learn/userscripts
    Learn AgentScripts: https://customaise.com/learn/agentscripts
    Pricing: https://customaise.com/pricing
    Report bugs: https://github.com/getcustomaise/feedback/issues
    Changelog: https://github.com/getcustomaise/feedback/blob/main/CHANGELOG.md
    
    Chrome Manifest V3. 21 languages supported.
    Rewrite any website in plain language. Open every website to your AI agent.
    
    Customaise is a Chrome extension that does both.
    
    
    You already know what you want.
    
    The button is three menus deep. The export doesn't exist. The dark mode was never shipped. Your agent can't finish the workflow, submit the form, or touch the admin panel.
    
    You've learned to live with it.
    
    
    What if you could just say to fix it?
    
    You can. You see a problem. You describe it. It gets fixed. Every time you come back.
    
    
    🟢 ONE EXTENSION. TWO PATHS. UNLIMITED SOLUTIONS.
    
    Pick the shape that fits the problem. Stack them on any page.
    
    ✅ For you. Reshape any page. Inbox that dims promotions. Feed that kills the sidebar. CRM that sorts itself. Every fix becomes a UserScript in your library, running on your sites, following you across devices. The userscript manager that writes itself.
    
    ✅ For your agent. Create any tool. Archive the inbox. Place the trade. Export the lead. Book the flight. AgentScripts turn any page into named tools for browser automation, called in milliseconds through WebMCP, under your own session.
    
    
    🟢 CONNECT YOUR IDE
    
    Customaise exposes 18 tools through MCP, covering script lifecycle, tab control, browser context, visual DOM targeting, and WebMCP calls with HITL consent. Any MCP-compatible coding agent can call them. Uses your IDE's AI subscription, not ours.
    
    
    🟢 UNDER YOUR CONTROL
    
    Every capability a script or agent uses is declared up front and enforced by the extension.
    
    ✅ Allow, prompt, or deny per tool. Sensitive calls wait for your explicit OK.
    ✅ Approve from the tab, or from your phone if you're away from your desk.
    ✅ @grant gates the GM_* API surface. @connect allowlists network hosts. SRI covers third-party code in @require and @resource.
    ✅ Every edit creates a restore point. Unlimited undo.
    
    
    🟢 SHARE WHAT YOU BUILD
    
    Publish any script from your Account Portal. Each one gets a dedicated install page you can share. Public listings, private invite links, or links for teams and clients. Subscribers get automatic updates as you improve.
    
    
    🟢 PRIVACY FIRST
    
    In-browser AI runs on paid Gemini APIs. When you connect your IDE through MCP, it uses your IDE's AI subscription instead. Your prompts never train a model. Conversations encrypted on your device with AES-256-GCM. Your key, your control.
    
    
    🟢 READY WHEN YOU ARE
    
    One minute to install. One sentence to make your first fix.
    
    
    🟢 LINKS
    
    Website: https://customaise.com
    Learn UserScripts: https://customaise.com/learn/userscripts
    Learn AgentScripts: https://customaise.com/learn/agentscripts
    Pricing: https://customaise.com/pricing
    Report bugs: https://github.com/getcustomaise/feedback/issues
    Changelog: https://github.com/getcustomaise/feedback/blob/main/CHANGELOG.md
    
    Chrome Manifest V3. 21 languages supported.
  • Apr 26, 2026
    description
    ✨ Customise any website, automate repetitive tasks, and manage userscripts with an AI browser agent. Describe changes in your own words, in any of 21 supported languages. No coding required. Tampermonkey compatible.
    
    Why are you still fighting websites that don't work the way you need them to?
    
    You spend hours scrolling past bad layouts, clicking the same buttons, and putting up with interfaces you can't change. Most people accept it. Customaise fixes that.
    
    Tell the AI what you want, and an autonomous Gemini AI agent writes the code, tests it, and installs it. The change runs automatically every time you visit that page. No coding. No developer tools. No tickets to file.
    
    You see a problem, you describe it, it gets fixed.
    
    
    🛠️ SOLVE REAL PROBLEMS
    
    Stop adapting to bad websites. Make them adapt to you.
    
    ⚡️ Automate workflows: turn 47 daily clicks into a single action.
    ⚡️ Add missing features: export buttons for locked tables, hotkeys for tools that forgot them.
    ⚡️ Fix interfaces: force dark mode, increase font sizes, hide distracting feeds and pop-ups.
    ⚡️ Extract data: pull information off pages that lock it behind bad UIs.
    ⚡️ Live prototyping: show stakeholders a working fix in the browser, not a slide deck.
    
    
    🎯 HOW IT WORKS
    
    Three ways to tell the AI what you want, in any of 21 supported languages:
    
    👆 Point and click: Hover over any element on the page and click to select it. The AI understands what you mean and generates the right code.
    ⌨️ Plain language: Type "hide the sidebar" or "make the font bigger" or "auto-click the confirm button."
    🎙️ Voice input: Press the mic and talk. Real-time transcription with a live waveform and auto-restart on silence.
    
    
    🤖 AUTONOMOUS AI AGENT
    
    Customaise is powered by a Gemini AI agent that understands your browser:
    
    ✓ Plans multi-step changes before writing code.
    ✓ Sees your page structure and existing scripts.
    ✓ Self-corrects when something breaks.
    ✓ Explains what the code does as you go.
    ✓ Deploys a Browser Agent that clicks, types, scrolls, and navigates on your behalf.
    
    
    🛡️ ZERO RISK
    
    Your changes float in a safe layer above the page. The site's source code is never touched.
    
    ✓ Every edit creates a restore point automatically.
    ✓ One-click undo to any previous version.
    
    
    🐒 TAMPERMONKEY COMPATIBLE
    
    Already use userscripts? Customaise is a next-generation userscript manager.
    
    ✓ One-click import for your existing .user.js files.
    ✓ Full support for Metadata, @match rules, and GM_* APIs.
    ✓ Seamless migration from Tampermonkey or Violentmonkey.
    
    
    ☁️ CLOUD SCRIPT SHARING
    
    Build once, share anywhere. Manage your scripts from a unified Account Portal.
    
    ✓ Publish your scripts to the community and build your portfolio.
    ✓ Subscribe to tools built by others and receive automatic updates.
    ✓ Share private install links for team or client distribution.
    
    
    💻 PROFESSIONAL CODE EDITOR
    
    For developers who want full control: the Monaco editor that powers VS Code. Syntax highlighting, validation, and an AI that reads your console errors to debug alongside you.
    
    
    🔒 PRIVACY FIRST
    
    Your data is yours.
    
    ✓ We use paid Gemini APIs. Your prompts are never used to train models.
    ✓ All conversation history is encrypted on your device with a key only you control.
    ✓ AES-256-GCM encryption with 100,000-iteration key derivation.
    
    
    🚀 POWER USER UPGRADE (ONE-TIME PURCHASE)
    
    No subscriptions. Upgrade once, own it forever. Everything above, plus:
    
    💎 MCP Server: connect AI coding agents like Cursor, Claude Code, Codex, Windsurf, and Antigravity to manage scripts, inspect pages, and control tabs.
    💎 Bring Your Own Key (BYOK): no usage caps, all Gemini models.
    💎 33% off Token Packs, priority support, and early access to new features.
    💎 Cross-device sync: scripts, conversations, and settings across devices.
    💎 Gemini Pro: advanced reasoning for complex, multi-step changes.
    
    
    🏗️ BUILT FOR MANIFEST V3
    
    Customaise is built from the ground up on Chrome's latest Manifest V3 architecture. No deprecation warnings. No MV2 sunset risk. Future-proof.
    
    
    🔗 LINKS
    
    Website: https://customaise.com
    Report bugs: https://github.com/getcustomaise/feedback/issues
    Request features: https://github.com/getcustomaise/feedback/issues
    Changelog: https://github.com/getcustomaise/feedback/blob/main/CHANGELOG.md
    Rewrite any website in plain language. Open every website to your AI agent.
    
    Customaise is a Chrome extension that does both.
    
    
    You already know what you want.
    
    The button is three menus deep. The export doesn't exist. The dark mode was never shipped. Your agent can't finish the workflow, submit the form, or touch the admin panel.
    
    You've learned to live with it.
    
    
    What if you could just say to fix it?
    
    You can. You see a problem. You describe it. It gets fixed. Every time you come back.
    
    
    🟢 ONE EXTENSION. TWO PATHS. UNLIMITED SOLUTIONS.
    
    Pick the shape that fits the problem. Stack them on any page.
    
    ✅ For you. Reshape any page. Inbox that dims promotions. Feed that kills the sidebar. CRM that sorts itself. Every fix becomes a UserScript in your library, running on your sites, following you across devices. The userscript manager that writes itself.
    
    ✅ For your agent. Create any tool. Archive the inbox. Place the trade. Export the lead. Book the flight. AgentScripts turn any page into named tools for browser automation, called in milliseconds through WebMCP, under your own session.
    
    
    🟢 CONNECT YOUR IDE
    
    Cursor, Claude Code, Codex, Antigravity, Kiro, and Windsurf plug straight into Customaise. 18 tools for script lifecycle, tab control, browser context, visual DOM targeting, and WebMCP calls with HITL consent. Uses your IDE's AI subscription, not ours.
    
    
    🟢 UNDER YOUR CONTROL
    
    Every capability a script or agent uses is declared up front and enforced by the extension.
    
    ✅ Allow, prompt, or deny per tool. Sensitive calls wait for your explicit OK.
    ✅ Approve from the tab, or from your phone if you're away from your desk.
    ✅ @grant gates the GM_* API surface. @connect allowlists network hosts. SRI covers third-party code in @require and @resource.
    ✅ Every edit creates a restore point. Unlimited undo.
    
    
    🟢 SHARE WHAT YOU BUILD
    
    Publish any script from your Account Portal. Each one gets a dedicated install page you can share. Public listings, private invite links, or links for teams and clients. Subscribers get automatic updates as you improve.
    
    
    🟢 PRIVACY FIRST
    
    In-browser AI runs on paid Gemini APIs. When you connect your IDE through MCP, it uses your IDE's AI subscription instead. Your prompts never train a model. Conversations encrypted on your device with AES-256-GCM. Your key, your control.
    
    
    🟢 READY WHEN YOU ARE
    
    One minute to install. One sentence to make your first fix.
    
    
    🟢 LINKS
    
    Website: https://customaise.com
    Learn UserScripts: https://customaise.com/learn/userscripts
    Learn AgentScripts: https://customaise.com/learn/agentscripts
    Pricing: https://customaise.com/pricing
    Report bugs: https://github.com/getcustomaise/feedback/issues
    Changelog: https://github.com/getcustomaise/feedback/blob/main/CHANGELOG.md
    
    Chrome Manifest V3. 21 languages supported.
  • Apr 26, 2026
    short_description
    The web, on your terms. Tell AI what to change on any site. It writes the code, you keep the result.
    The web wasn't built for you. Fix that. Plain-language changes for you. Page tools for your AI.
  • Apr 26, 2026
    name
    Customaise: AI Website & Userscript Editor
    Customaise: AI Userscript & Agentscript Manager. Powered by MCP & WebMCP
  • Apr 9, 2026
    name
    Customaise
    Customaise: AI Website & Userscript Editor
  • Apr 1, 2026
    description
    Why are you fighting your own browser?
    
    You spend hours scrolling past bad layouts, clicking the same buttons, and suffering interfaces you can't change. Customaise fixes that.
    
    Tell it what you want in plain English (or any language you prefer) and an autonomous AI agent writes, tests, and deploys a script that runs locally in your browser. No coding required.
    
    🤖 AI That Actually Works
    
    Customaise is powered by a Gemini AI agent that:
    • Plans, writes, tests, and deploys code for you
    • Sees your page structure and self-corrects on failure
    • Explains what your code does, so you learn as you go
    • Supports 50+ languages, so you can describe changes in your own words
    
    ⚡ Solve Everyday Frustrations
    
    ✅ Click Autopilot: turn 47 daily clicks into one
    ✅ Data Liberation: that table with no export? Now it has one
    ✅ Instant Prototype: show stakeholders the fix, not a slide deck
    ✅ Keyboard First: add hotkeys to tools that forgot them
    ✅ Restyle anything: hide distractions, add dark modes, fix layouts
    
    🔒 Zero Risk. Infinite Undo.
    
    We never touch the site's source code. Your changes float in a safe layer above the page. Messed up? Slide the timeline back. One click restores everything.
    
    • Automatic version history (Wayback Machine)
    • Every edit creates a restore point
    • One-click undo to any previous version
    
    🛡️ Your Data Isn't Ours. It Never Was.
    
    • Stored locally in your browser, not our servers
    • Conversations encrypted on-device
    • No AI training on your data (we use paid Gemini APIs)
    • BYOK security: bring your own API key, encrypted via Cloud KMS
    • One click deletes everything, permanently
    
    🛠️ Professional Tools
    
    • Monaco editor (the VS Code engine) with syntax highlighting
    • Visual DOM element picker: point, click, customise
    • AI-powered debugging from your console logs
    • Full Tampermonkey/Greasemonkey import support
    • GM_* and VM_* API compatibility
    
    📱 Power User Upgrade
    
    • Cross-device sync for all your scripts
    • Gemini Pro for deeper reasoning
    • Priority support and early access to new features
    • BYOK for unlimited AI at your own API cost
    
    Works in any language. Built on Manifest V3 for security and performance.
    
    Stop browsing. Start customaising. Safely, intelligently, and on your terms.
    
    Free forever with 200K monthly AI tokens.
    
    Learn more: https://customaise.com
    ✨ Customise any website, automate repetitive tasks, and manage userscripts with an AI browser agent. Describe changes in your own words, in any of 21 supported languages. No coding required. Tampermonkey compatible.
    
    Why are you still fighting websites that don't work the way you need them to?
    
    You spend hours scrolling past bad layouts, clicking the same buttons, and putting up with interfaces you can't change. Most people accept it. Customaise fixes that.
    
    Tell the AI what you want, and an autonomous Gemini AI agent writes the code, tests it, and installs it. The change runs automatically every time you visit that page. No coding. No developer tools. No tickets to file.
    
    You see a problem, you describe it, it gets fixed.
    
    
    🛠️ SOLVE REAL PROBLEMS
    
    Stop adapting to bad websites. Make them adapt to you.
    
    ⚡️ Automate workflows: turn 47 daily clicks into a single action.
    ⚡️ Add missing features: export buttons for locked tables, hotkeys for tools that forgot them.
    ⚡️ Fix interfaces: force dark mode, increase font sizes, hide distracting feeds and pop-ups.
    ⚡️ Extract data: pull information off pages that lock it behind bad UIs.
    ⚡️ Live prototyping: show stakeholders a working fix in the browser, not a slide deck.
    
    
    🎯 HOW IT WORKS
    
    Three ways to tell the AI what you want, in any of 21 supported languages:
    
    👆 Point and click: Hover over any element on the page and click to select it. The AI understands what you mean and generates the right code.
    ⌨️ Plain language: Type "hide the sidebar" or "make the font bigger" or "auto-click the confirm button."
    🎙️ Voice input: Press the mic and talk. Real-time transcription with a live waveform and auto-restart on silence.
    
    
    🤖 AUTONOMOUS AI AGENT
    
    Customaise is powered by a Gemini AI agent that understands your browser:
    
    ✓ Plans multi-step changes before writing code.
    ✓ Sees your page structure and existing scripts.
    ✓ Self-corrects when something breaks.
    ✓ Explains what the code does as you go.
    ✓ Deploys a Browser Agent that clicks, types, scrolls, and navigates on your behalf.
    
    
    🛡️ ZERO RISK
    
    Your changes float in a safe layer above the page. The site's source code is never touched.
    
    ✓ Every edit creates a restore point automatically.
    ✓ One-click undo to any previous version.
    
    
    🐒 TAMPERMONKEY COMPATIBLE
    
    Already use userscripts? Customaise is a next-generation userscript manager.
    
    ✓ One-click import for your existing .user.js files.
    ✓ Full support for Metadata, @match rules, and GM_* APIs.
    ✓ Seamless migration from Tampermonkey or Violentmonkey.
    
    
    ☁️ CLOUD SCRIPT SHARING
    
    Build once, share anywhere. Manage your scripts from a unified Account Portal.
    
    ✓ Publish your scripts to the community and build your portfolio.
    ✓ Subscribe to tools built by others and receive automatic updates.
    ✓ Share private install links for team or client distribution.
    
    
    💻 PROFESSIONAL CODE EDITOR
    
    For developers who want full control: the Monaco editor that powers VS Code. Syntax highlighting, validation, and an AI that reads your console errors to debug alongside you.
    
    
    🔒 PRIVACY FIRST
    
    Your data is yours.
    
    ✓ We use paid Gemini APIs. Your prompts are never used to train models.
    ✓ All conversation history is encrypted on your device with a key only you control.
    ✓ AES-256-GCM encryption with 100,000-iteration key derivation.
    
    
    🚀 POWER USER UPGRADE (ONE-TIME PURCHASE)
    
    No subscriptions. Upgrade once, own it forever. Everything above, plus:
    
    💎 MCP Server: connect AI coding agents like Cursor, Claude Code, Codex, Windsurf, and Antigravity to manage scripts, inspect pages, and control tabs.
    💎 Bring Your Own Key (BYOK): no usage caps, all Gemini models.
    💎 33% off Token Packs, priority support, and early access to new features.
    💎 Cross-device sync: scripts, conversations, and settings across devices.
    💎 Gemini Pro: advanced reasoning for complex, multi-step changes.
    
    
    🏗️ BUILT FOR MANIFEST V3
    
    Customaise is built from the ground up on Chrome's latest Manifest V3 architecture. No deprecation warnings. No MV2 sunset risk. Future-proof.
    
    
    🔗 LINKS
    
    Website: https://customaise.com
    Report bugs: https://github.com/getcustomaise/feedback/issues
    Request features: https://github.com/getcustomaise/feedback/issues
    Changelog: https://github.com/getcustomaise/feedback/blob/main/CHANGELOG.md

Permissions & access

Permissions
storageunlimitedStoragescriptinguserScriptsalarmsoffscreenwebNavigationnotificationsclipboardWritedownloadstabsactiveTabcontextMenuscookiesidentitydebugger
Host access
<all_urls>, file:///*

Screenshots

Customaise: AI Userscript & Agentscript Manager. Powered by MCP & WebMCP screenshot 1Customaise: AI Userscript & Agentscript Manager. Powered by MCP & WebMCP screenshot 2Customaise: AI Userscript & Agentscript Manager. Powered by MCP & WebMCP screenshot 3Customaise: AI Userscript & Agentscript Manager. Powered by MCP & WebMCP screenshot 4Customaise: AI Userscript & Agentscript Manager. Powered by MCP & WebMCP screenshot 5Customaise: AI Userscript & Agentscript Manager. Powered by MCP & WebMCP screenshot 6

About

Your AI writes the tool. Customaise runs it. No API keys, no OAuth, no headless browser. Just the Chrome you're already in.


You already know what you want.

The button is three menus deep. The export doesn't exist. The dark mode was never shipped. Your agent can't finish the workflow, submit the form, or touch the admin panel.

You've learned to live with it.


What if you could just say to fix it?

You can. You see a problem. You describe it. It gets fixed. Every time you come back.


🟢 ONE EXTENSION. TWO PATHS. UNLIMITED SOLUTIONS.

Pick the shape that fits the problem. Stack them on any page.

✅ For you. Reshape any page. Inbox that dims promotions. Feed that kills the sidebar. CRM that sorts itself. Every fix becomes a UserScript in your library, running on your sites, following you across devices. The userscript manager that writes itself.

✅ For your AI. Create any tool. Archive the inbox. Place the trade. Export the lead. Book the flight. AgentScripts turn any page into named tools for browser automation, called in milliseconds through WebMCP, under your own session.


🟢 CONNECT YOUR AGENT

Customaise exposes 18 tools through MCP, covering script lifecycle, tab control, browser context, visual DOM targeting, and WebMCP calls with HITL consent. Any MCP-compatible coding agent can call them. Uses your IDE's AI subscription, not ours.


🟢 FREE ON-DEVICE AI

Chrome 148+ ships with built-in Gemini Nano via the Prompt API. Pick Nano as the model in Chat, or call it from any script via @grant CM_promptAI. No API key. Your prompts never leave your machine. No per-call cost. Works offline once the model is provisioned.


🟢 UNDER YOUR CONTROL

Every capability a script or agent uses is declared up front and enforced by the extension.

✅ Allow, prompt, or deny per tool. Sensitive calls wait for your explicit OK.
✅ Approve from the tab, or from your phone if you're away from your desk.
✅ @grant gates the GM_* API surface. @connect allowlists network hosts. SRI covers third-party code in @require and @resource.
✅ Chrome DevTools Access is off by default and resets every Chrome restart. Scripts that declare @grant CM_devtools only reach the debugger when you turn the toggle on; Chrome shows its yellow banner while a session is held.
✅ Every edit creates a restore point. Unlimited undo.


🟢 SHARE WHAT YOU BUILD

Publish any script from your Account Portal. Each one gets a dedicated install page you can share. Public listings, private invite links, or links for teams and clients. Subscribers get automatic updates as you improve.


🟢 PRIVACY FIRST

In-browser AI runs on paid Gemini APIs, or pick the on-device Gemini Nano model in Chat (Chrome 148+) to keep your prompts entirely on your machine. Scripts you write can also call on-device AI directly via `@grant CM_promptAI`. When you connect your IDE through MCP, it uses your IDE's AI subscription instead. Your prompts never train a model. Conversations encrypted on your device with AES-256-GCM. Your key, your control.


🟢 READY WHEN YOU ARE

One minute to install. One sentence to make your first fix.


🟢 LINKS

Website: https://customaise.com
Learn UserScripts: https://customaise.com/learn/userscripts
Learn AgentScripts: https://customaise.com/learn/agentscripts
Pricing: https://customaise.com/pricing
Report bugs: https://github.com/getcustomaise/feedback/issues
Changelog: https://github.com/getcustomaise/feedback/blob/main/CHANGELOG.md

Chrome Manifest V3.

Technical

Version
1.2.8
Manifest
V3
Size
7.64MiB
Min Chrome
120
Languages
1
Featured
No

Metadata

ID
anmpijcpaobaabcdncjjmnhdeibipmko
Developer ID
ub85dd24a5f6da1141984cb0a4d8f74fb
Developer Email
[email protected]
Created
Oct 13, 2025
Last Updated (Store)
Jun 8, 2026
Last Scraped
Jun 9, 2026
Website
customaise.com

Data sourced from the Chrome Web Store · last verified Jun 9, 2026.