WAVE Evaluation Tool
Accessibility
Evaluate web accessibility within your browser.
Users
600K
Rating
4.1
Reviews
159
7D Growth
-100K|-14.3%
Stable signalNo paid features detectedMedium-risk permissions
Protractor
Easily measure angles in your browser window.
Users70KCurrent public install base
Rating4.2Store average score
Reviews107Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview
2 assetsProtractor Media preview
Trend
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User Growth Over Time
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7-day rating change
Start
4.19
Latest
4.19
7-day rating change
0.00
2026年7月15日2026年7月21日
Growth overview
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1-day growthFlat
00%7-day growthFlat
00%30-day growthDeclining
-20K-22.2%Technical snapshot
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Version4.0.1
ManifestV3
Size74.37KiB
Languages1English
Published
Store updated
Last crawled
English
Overview
Product summary
Review the store description, core capabilities, and common use cases.
Move the two guides around to accurately match any vertex.
Customize precision, units, colors, and more.
The protractor can be easily resized, nudged, locked, and rotated.
Code is open source on Github.
Also on Firefox: https://addons.mozilla.org/en-US/firefox/addon/protractor/
Reviews
Recent review snapshot
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Store average score4.2Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average4.2Average computed only from synced review bodies below
Reviews with text84Synced review bodies
Total ratings / reviews107Chrome Web Store public rating/review count
Store average score: 4.2. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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Really good; you don't need a physical protractor
Works really well. However there is 1 thing I would like to see which would be a dark line mode which makes the protractor dark for working on light things like a document. But it works perfectly.
Great extension, I do have a suggestion though. So when you are trying to measure the angle you can make the lines transparent to make sure you are directly on what it is you are trying to measure
I used this for my school and it worked but when I closed it, I couldn't press any of my choices.! I'm going to keep trying this but if it keeps doing the same thing than...
So helpful for utility line design. Recommending it to all of my coworkers!
May I inquire , If I measure on a document of Microsft Word which are already a picture. Would it be possible?Kindle Help. Thank you
wouldn't work for me. Couldn't load over a jpg loaded in chrome. so I added it to google photos. It worked there, but the need to have the full circle prevents me from starting the center point at the top of the image.
Just brilliant! I use this to calculate angles on mapping for drone flying. I set the middle over something of interest (like a local airport), rotate the overlay so that 0° is true north, I then set the green pointer at the Magnetic deviation for my area (10.5° for my location) and the blue pointer for the area I want to work out. I can then see the difference between the Blue and Green pointers, giving me a Magnetic compass reference to work with. Absolutely love it.
Why do the angles increase backwards? I can rotate it to have zero at the top but for measuring bearings you go clockwise so 90 degrees would be on the right not the left. I can't see anyway to amend this in the options. Is this possible?
3.0.1 Does not working at all... no reaction after clicked the button...