Make pixel perfect measurements with rules, guides and frames directly in your Safari browser. Make use of powerful tools that float on top of any website and stay in sync with your browser scrolling. You can also save your work for future review.

Ruler for Safari is a great extension, just a click away, ready to use every time you need to measure website graphics, layouts and spaces.

• Measure the dimensions of any website object and layout
• Find distance between items
• Show pixel distance between guides and grid dimensions
• Display on screen rulers, guides and frames that float on top of any website and stay in sync with your browser scrolling
• Save and load guides for future review
• Snap guides to page objects for better control

We read your support emails every day, day by day.
Write with confidence any question, feedback or complain and you will receive an answer in a very short period of time.

Ratings and Reviews

M.Marlin ,

Check yours information from Safari

They collect all information from your safari (e-mail/passwards, etc.)

Developer Response ,

Dear user,
This extension is not collecting any information, is not accessing any information from your browser, it's very safe.
Also, it's reviewed and tested by Apple in order to enter the App Store and they do not allow apps or extensions that collects information about you.
Actually, all your extensions (like Evernote, AdBlocker and so on) will have the same description there, this is the standard.
So keep using the extension with confidence.
If you need more details you can send me an email to and I will gladly help you with more info.

JAFO reviewer ,

Works GREAT! (not paid for this review)

This is a MUST HAVE for front-end developers.

I just bought this, as I am studying the cool new version of javascript: p5 Javascript ( It is highly visual and a ruler would *really help* see what is going on with the canvases I create inside my browser (Safari). I Googled “ruler for Safari” and this app came up. I almost didn’t give it a chance because of the 1 star review, but that guy couldn’t even spell “passwords” correctly, or bother to use any free spell check, so I tried the software.

Here’s my review (keeping in mind that I spent my money, and I am not being given any consideraion for this). It does what it says. BUT you ***have to restart Safari*** to make it work. The only clue you get that it is even there is a small button that looks like an L with a stop sign [L*] just to the left of your address bar in your browser. You may have to “enable the extension” (search Google for how to do that in Safari if you have to).

But it works and is dead-simple: enable it and disable it as needed (click the button mentioned above and a fly out menu appears). Anyway, this is a great little program the developers probably aren’t making real money on, as it is so cheap and I would doubt very many people download rulers for Safari—so it does not appear to be a scam. Also, the idea that it steals your passwords is just stupid. It just installs. It did not ask me for ANY information.

Hope this helps.

Fighting internet trolls, one at a time.


Denk Alexandru
4.3 MB
macOS 10.12 or later, 64-bit processor
Age Rating
Rated 4+
© Denk Alexandru


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