Userscripts for Mac

Userscripts for Mac is a lightweight, open-source Safari extension for macOS that lets you create, save, and run custom JavaScript and CSS on the websites you visit.



Instead of living in a separate developer toolchain, it puts a practical code editor right in the browser so you can quickly write, edit, and apply “quality-of-life” tweaks to specific domains—anything from fixing annoying UI decisions to automating repetitive clicks.

The App Store listing emphasizes privacy (no user tracking) and a straightforward workflow, making it approachable for beginners while still offering power-user touches like autocomplete in the JavaScript editor and support for multiple site-specific scripts.

In everyday use, Userscripts for macOS shines when you want Safari to behave more like a programmable workspace: redirect rules, cosmetic CSS themes, small productivity automations, and page manipulation that would otherwise require switching browsers or installing heavier toolchains.

It also supports syncing across Apple platforms (Mac/iPhone/iPad) for people who want the same customizations everywhere.

Key Features

• Open Source: Transparent codebase and community-driven improvements.
• In-Browser Editor: Create and edit scripts/styles directly from Safari.
• JavaScript + CSS Support: Inject behavior changes and visual themes per site.
• Domain-Specific Scripts: Run different scripts on different websites.
• Local File Saving: Automatically saves scripts locally to the file system.
• Autocomplete Editor: “Advanced” JavaScript editing with suggestions.
• No User Tracking: Designed to work without tracking your activity.
• Common Use Cases: Redirects, page manipulation, ad-related tweaks, code injection.

User Interface

The UI is purpose-built: you’re not getting a bloated “developer suite,” but a clean extension workflow that prioritizes speed—open the extension, see what’s available for the current page, and jump into editing when needed.

The editor is the centerpiece and feels geared toward quick iteration: write a snippet, save, refresh, and immediately see results.

Feedback from users frequently highlights that it “just works” for Safari and makes theming or fixing sites painless, which is exactly what a userscript manager should do.

Installation and Setup

• Install Userscripts from the Mac App Store (it’s free).
• Open Safari and go to Settings/Preferences → Extensions.
• Enable Userscripts and allow it on the websites you want (or set it to ask).
• Open the Userscripts extension interface and confirm your scripts directory / save behavior (defaults are typically fine).
• Add your first script or style, then reload the target webpage to test.

How to Use

1. Open the Userscripts extension in Safari from the toolbar.
2. Create a new script (JavaScript) or style (CSS) depending on your goal.
3. Set the site matching rules (domain/path patterns) so it runs only where needed.
4. Paste or write your code in the built-in editor (use autocomplete for faster edits).
5. Save the script/style and reload the webpage to apply changes.
6. Toggle scripts on/off to troubleshoot conflicts or compare behavior.
7. Iterate: adjust the code, save again, and refresh until it’s perfect.
8. Organize multiple scripts by domain so your library stays clean and predictable.

FAQs

Is Userscripts really free?
Yes—Userscripts is listed as Free on the App Store.

What can I do with it besides “developer stuff”?
A lot: auto-redirects, removing annoying elements, improving layouts with CSS, adding buttons/shortcuts, and lightweight ad-related tweaks.

Does it track my browsing?
The listing explicitly says no user tracking.

Why does the toolbar icon sometimes show a badge number?
That count typically indicates how many scripts matched and were injected on the current page (and can be disabled in settings).

Is it maintained?
The App Store version history shows ongoing fixes and improvements, including memory-usage reductions and stability work.

Alternatives

Tampermonkey - Popular userscript manager available on major browsers, including Safari builds.

Violentmonkey - Open-source userscript manager for many WebExtension-compatible browsers.

Greasemonkey - Classic userscript manager primarily associated with Firefox.

Stay for Safari - Safari-focused extension platform that includes userscripts plus extra power-user features.

Pricing

• Free (Mac App Store).

System Requirements

• macOS 12.0 or later.
• Safari with Extensions enabled (WebExtension support).
• An internet connection is only needed for downloading/updating scripts (your scripts can run locally).

PROS

• Open-source and transparent approach.
• Free, lightweight install footprint.
• Built-in editor makes quick tweaks easy.
• Supports both JavaScript and CSS injection.
• Domain-specific control keeps changes targeted.
• Local saving helps the ownership/portability of scripts.
• Privacy-friendly: no user tracking stated.

CONS

• Requires some scripting confidence for advanced results.
• Poorly written scripts can break site behavior (user responsibility).
• Script conflicts can be time-consuming to debug.
• Safari permission prompts may feel strict compared to other browsers.
• Some websites’ security policies can limit what scripts can do.
• Not a full developer environment (by design), so heavy workflows need external tools.
• Cross-platform script ecosystems are still broader on Chrome/Firefox.

Conclusion

Userscripts for Mac is one of the most practical ways to “upgrade” Safari with custom behaviors and styling—without sacrificing simplicity or privacy.

If you like tailoring sites to your workflow, it’s an easy recommendation, and the FileHorse review team recommends it as a clean, Safari-native path to everyday automation.