Tampermonkey Review — Run Custom User Scripts on Any Website
Tampermonkey is a user script manager that lets you run custom JavaScript on any website — either scripts you write yourself or community scripts from repositories like Greasyfork. A single script can add download buttons to streaming sites, remove paywalls on research pages, enhance YouTube Studio, or automate repetitive web interactions. It is the most widely used user script manager on Chrome with over 10 million installs.
Install on Chrome Web Store →Key Features
Tampermonkey runs user scripts — small JavaScript programs — that modify how websites behave or look. Scripts are installed from repositories like Greasyfork or written manually. Once installed, they run automatically when you visit matching sites.
The script library on Greasyfork contains thousands of community-written scripts covering almost every website. Scripts that enhance YouTube Studio, add features to social platforms, remove paywalls from academic sources, and automate common web tasks are all available without writing any code.
Multiple scripts can run simultaneously across different sites. A YouTube enhancement script, a Reddit improvement script, and a social media automation script can all be active at the same time without conflict.
Script management — enabling, disabling, updating, and reviewing individual scripts — is handled through Tampermonkey's dashboard. Each script's permissions and access are visible and controllable.
Who Is It For
Creators who are comfortable with basic web technology and want to customise how specific websites behave — adding features, automating repetitive actions, or removing elements that interfere with their workflow. The extensive community script library means most use cases are covered without writing code.
Creators who are not comfortable evaluating third-party code should approach Tampermonkey carefully. User scripts have access to page content and can read and modify site data — installing scripts from unverified sources without reviewing the code is a security risk. This is not an extension for technically uncomfortable users.
Pros and Cons
- ✅ Extreme flexibility — any website can be modified with the right script
- ✅ Vast community script library on Greasyfork covers most use cases without coding
- ✅ Completely free
- ❌ Security risk if scripts from unverified sources are installed without code review
- ❌ Scripts may break when websites update their interface or code
Pricing
Tampermonkey is completely free. No paid version, no account required. Community script repositories are also free.
Summary
Worth installing for technically comfortable creators who want to customise browser behaviour beyond what standard extensions offer. The community script ecosystem covers an enormous range of website enhancements. Approach with appropriate caution around script sources — review what a script does before installing it.