Tweeks vs. Tampermonkey: Which Website Customization Tool Fits You?

Many people find Tweeks without having heard of Tampermonkey, Greasemonkey, or userscript managers at all. Others arrive with the immediate question: "How is this different from Tampermonkey?"

We want to support both users well. If userscript managers are new to you, this article can give you some historical context. If you already know Tampermonkey, it will explain where Tweeks overlaps, where it differs, and why those differences matter.

Tampermonkey is one of the best-known userscript managers. It helps people install, write, manage, and run JavaScript snippets that change websites. If you already know JavaScript, CSS selectors, userscript metadata, and the Greasemonkey-style GM_* APIs, Tampermonkey gives you a direct way to control the pages you use.

Tweeks starts from the same idea - websites should be adjustable by the people using them - but the entry point is different. Instead of asking you to write the script first, Tweeks lets you describe the change in plain English, generates the userscript, installs it, and lets you keep editing it with follow-up requests. It also includes a built-in community where you can share your own tweeks and install modifications other people have published.

TL;DR

Use Tampermonkey if you want a script-first tool and you are comfortable finding, reading, writing, or debugging userscripts yourself.

Use Tweeks if you want the flexibility of userscripts without starting from code. It is built for people who want to remove distractions, add missing buttons, change layouts, automate workflows, or install community modifications with less setup.

For technical users, the shorter version is:

What Tampermonkey Is

Tampermonkey comes from the userscript tradition: small programs that run on matching websites and change the page. A userscript might hide a sidebar, add a download button, restyle a feed, autofill a form, or add a shortcut the site never shipped.

The broader userscript ecosystem usually has three parts:

1. A userscript manager such as Tampermonkey, Greasemonkey, or Violentmonkey.
2. A script source such as Greasy Fork, a GitHub repo, a gist, or your own editor.
3. A browser extension runtime that decides which scripts run on which pages.

Tampermonkey is built for people who want to manage those scripts directly. Its documentation covers headers such as @match, @grant, @run-at, @require, and @connect, plus GM_* APIs for storage, network requests, notifications, tabs, downloads, resources, and more. Its dashboard, editor, update checks, and configuration modes all assume you are comfortable working with scripts.

That model works well when you know the code you want to run, or when you are installing a script from a community you trust.

The challenge is when the desired change is clear but the implementation is not. "Hide Shorts from YouTube" is easy to say. Turning that into a stable script can require DOM inspection, selectors, page lifecycle handling, storage, permissions, and ongoing maintenance. Even for someone technical, it is time consuming and difficult to build it, and there are no guarantees that it will still work next week.

What Tweeks Changes

Tweeks is a browser extension for creating, installing, sharing, and managing website modifications, which we call tweeks. Under the hood, most tweeks are userscripts.

The core difference is that Tweeks treats the script as the implementation, not the starting point. You start with the change you want. You can open a site and write:

hide sponsored results and AI Overview on Google

or:

add a download CSV button to this table

or:

make LinkedIn filter to only posts within the last 3 days

When you ask Tweeks to create or update a tweek, it uses the page context and your request to generate a userscript, install it locally, and keep the source code available for inspection or manual editing.

You get the flexibility of userscripts without starting from code. You also get a built-in community layer: install tweeks other people have published, share your own, or keep them private.

Creating

In Tampermonkey, creation usually starts with an editor and a metadata block:

// ==UserScript==
// @name         My site fix
// @match        https://example.com/*
// @grant        GM_addStyle
// ==/UserScript==

Tweeks includes a full-fledged editor with version history, syntax highlighting, and diffs, but most creation starts from the page and the request rather than manual coding. The generated result is still a script, but you don't need to know the metadata format before you can begin.

Updating

When a site changes, a Tampermonkey user often debugs selectors, adjusts code, and tests the script again. In Tweeks, you can still edit the code directly, but you can also ask for an update in natural language: "it works on the homepage, but not on search result pages" or "keep the button, but move it next to the export menu."

That's essential for non-technical users, but it's also useful for technical users who don't want every small browser fix to become a maintenance task.

Sharing and Discovery

Tampermonkey scripts are usually shared through external sites such as Greasy Fork, GitHub, forums, or direct .user.js links.

Tweeks brings more of that workflow into the product. You can keep a tweek private, publish it to the public library, add it to your profile, or install public tweeks from other users.

The Tweeks extension can also recommend relevant public tweeks when you visit supported sites. Those recommendations are optional and can be turned off.

Under the Hood

For technical readers, Tweeks is a Manifest V3 userscript manager with AI-assisted creation layered on top.

The extension includes:

• a script repository for installed scripts and source code
• a metadata parser for userscript headers
• a permission system for @grant directives
• a compiler that builds runtime stubs and exposes allowed APIs
• URL matching for @match, @include, excludes, and globs
• runtime adapters for Chromium, Firefox, and Safari
• service-worker handlers for privileged operations such as tabs, downloads, notifications, network requests, and generation

On Chromium, this sits on top of the browser userScripts API where available. Manifest V3 made userscript execution more browser-specific, so Tweeks uses runtime adapters for Chromium, Firefox, and Safari and degrades gracefully if the browser has not granted the permissions needed to run userscripts.

Tweeks also implements familiar Greasemonkey-style APIs such as:

• GM_getValue, GM_setValue, GM_deleteValue, and value listeners
• GM_xmlhttpRequest
• GM_addStyle and GM_addElement
• GM_notification
• GM_openInTab
• GM_setClipboard
• GM_download
• GM_registerMenuCommand
• GM_getResourceText and GM_getResourceURL

It also adds Tweeks-specific APIs:

• TW_inference for model calls from a tweek
• TW_email for sending or scheduling email to the signed-in user's account
• TW_contextMenu for context-menu actions
• TW_toast and TW_alert for local UI notifications

Those APIs are gated by userscript grants. A script does not get every capability just because it exists. The Tweeks Engine API Reference has signatures, grants, examples, and notes for each TW_* API.

Privacy And Control

Any userscript manager deserves scrutiny because scripts can read and change pages where they run. Tweeks keeps the control points visible:

• You choose which tweeks to install.
• You can enable, disable, update, edit, or remove them.
• Public tweeks show source code before install.
• Scripts remain private unless you share them.
• Tweeks uses page context for generation only when you actively ask it to create or update a tweek.
• Installed tweeks run locally in the browser on the sites you choose.

Which One Should You Use?

Choose Tampermonkey when:

• you already have a userscript you trust
• you are comfortable reading and debugging JavaScript
• you use an existing userscript community as your source of scripts
• you prefer local manual editing

Choose Tweeks when:

• you know the website change you want, but not necessarily the code
• you want a web editor with syntax highlighting, version control, and diff views
• you want to install community modifications with a simpler workflow
• you want built-in sharing and public profiles
• you want userscripts plus AI, email, notification, and context-menu APIs
• you want to import existing userscripts but manage them inside Tweeks

If you already have a userscript workflow and want a no-frills manager, Tampermonkey remains a good fit. If you want userscript compatibility plus help creating, updating, sharing, and discovering modifications, Tweeks adds that workflow on top of the same basic model.

Sources

• Tampermonkey home
• Tampermonkey documentation
• Tampermonkey Content Script API notes
• Chrome userScripts API
• MDN userScripts API
• Greasy Fork userscript overview
• About Tweeks
• Tweeks Engine API Reference
• Tweeks extension listing