CSS Shapes Editor

Description

Create and adjust CSS Shapes values with an interactive editor overlapping the selected element.

Update 21 May 2015:
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For polygons, unit-less zero coordinates will inherit the non-zero sibling coordinate unit instead of defaulting to pixels.
Example 0 100% => 0% 100%

Shapes sidebar:
New sidebar to the DevTools Elements panel called "Shapes" which offers controls to create and edit CSS Shapes values like polygon(), circle() and ellipse() on the selected element.

Polygons:
Click the edges of the shape to add new points. Drag points to change the shape. Double-click points to remove them. Select the transform tool to move, scale and rotate the polygon shape.

Circles & ellipses:
Drag the shape to move it around. Pull on the edges and corners to scale and resize.

Update History
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Update 13 Jan 2015:
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Provides workaround for Chrome 40+ regression which causes editor to fail when selecting an element to edit.

Update 8 Dec 2014:
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This extension has been wrongly accused of spreading malware. It does not.

Its source code is always available for inspection: https://github.com/oslego/chrome-css-shapes-editor

The latest release (Version 1.2.0) addresses some potential vulnerabilities exploitable by 3rd party malicious scripts.

If you experience malicious behavior from your browser, reset your browser settings:
https://support.google.com/chrome/answer/3296214