Four measuring modes
Drag measure, element measure, guides and a color loupe cover most "how many pixels is that?" questions.
4 modes
SR
Developer tools · Measurement
Screen Ruler measures any page in pixels, with no standing site access.
Drag to measure sizes, hover elements for spacing, drop guides and pick colors on the page you are looking at. Free, local-first, and it only runs when you invoke it.
Recommended for your browser
Choose where to install
Official stores are the safest choice and provide automatic updates.
CH
Chrome
Detected: Chrome
Other browsers
Developer / manual installation
Use the ZIP only when an official store is unavailable.
- Unzip the file, open the browser's Extensions page, enable Developer mode, then choose Load unpacked.
Manual installations do not update automatically. ZIP files are not one-click installers.
Completely free · no paywall
product screenshot · Screen Ruler onboarding
product screenshot · Screen Ruler options
product screenshot · Screen Ruler popup
Runs only when asked
No content script watches your browsing. The overlay is injected via activeTab when you click the icon, and Esc removes it completely.
activeTab onlyFree by design
No account, no paywall and no tracking. It exists to make our paid tools easier to trust.
freePrivate by construction
local-first · optional online features disclosed · no data sold
- No analytics
- No telemetry
- No third-party SDKs
- Core processing stays local; optional sync, backup, AI or sharing connects only when you enable it
Questions people ask
Is Screen Ruler free?
Yes. It is a free extension with no account requirement and no paid upgrade.
Do measurements leave my browser?
No. Measurements and picked colors stay on your machine; the extension makes no network calls.
Does it run on every page I visit?
No. It has no host permissions. It activates only on the tab where you invoke it, and pressing Esc removes the overlay.
Questions & suggestions
Ask a question, request a feature or report an issue. We read every message and publish the useful ones with our answer.
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