AI 产品解读An in-browser protractor overlay that lets users measure angles on any webpage
Users need to quickly measure angles on screen content (designs, images, diagrams, etc.) without switching to external measurement tools
User clicks the extension icon → protractor overlay appears centered on the current page → user drags two guide arms to align with a vertex → angle is displayed in real-time → user can resize, rotate, lock, nudge, and customize appearance via options page → click extension icon again to hide
Overlay a resizable protractor on any webpageTwo draggable guide arms to match any vertex for angle measurementDisplay angle in configurable units (degrees or radians) with adjustable precisionCustomize colors for arc, display, circle, guides, and markersRotate, resize, lock, and nudge the protractor positionConfigurable marker interval, length, snapping, and label display
- 目标用户
- Students and educators measuring angles for geometry/math / Designers verifying angles in web layouts or images / Engineers and architects inspecting visual diagrams / Government agencies and schools (mentioned in FAQ)
付费分析未识别到付费功能
Extension is fully free and open source under MIT license. No premium/upgrade/billing/subscription/plan keywords found anywhere. The 'subscribe' hits are from the PubSub (publish-subscribe) messaging pattern used internally, not payment subscriptions. The only monetization is a voluntary 'Buy Me a Coffee' donation link on welcome.html. No features are gated behind payment.
- 置信度
- 100
- 支付平台
- --
- 来源
- AI / 高
- 需要登录
- 否
- 登录理由
- The extension is a purely local overlay tool. It uses chrome.storage.sync for saving user preferences and chrome.scripting to inject CSS/JS into the active tab. There is no authentication flow, no account creation, no API keys, and no destination service requiring login. The 'account' hit in guide.js:132 is a code comment about math: 'Must account for global rotation'
Brilliant tool - would love it if it could also display mils (6400)!
Nice tool, thank you so much
For years and years I've searched for a tool that could measure angles. No learning curve here. Accuracy up to 4 decimal digits. Zero-angle (+ x-axis) rotatable to any angle. Click- nudge to get an angle vertex exactly over a point. Zoomable. There are other options and most are adjustable. Beyond imaginable! No improvements left for me except going outside the browsers!
just amazing bro
Simple to use and very effiency!! I really hint it to everyone.
The tool seems to be very helpful. However, the numbering system on my protractor is counterclockwise and I am unable to rectify the problem [90 is 270 and vice versa]. I've tried uninstalling and reinstalling multiple times and it appears to be the default. Please help!
very simple to use, if a little difficult to center exactly. but overall it helped a lot :)
It's been really helpful during my online classes
Fantastic UI design, not fiddly at all.
It is anti-clockwise. No setting to flip it. Useless.