Best PixelPerfect Alternatives

PixelPerfect is described as 'Allows developers to put a semi-transparent image overlay over the top of the developed HTML and perform per pixel comparison between them. Works with DevTools and Firebug' and is an app in the web browsers category. There are seven alternatives to PixelPerfect for Mac, Windows, Linux, Online / Web-based and SIMBL. The best alternative is Overlay2. It's not free, so if you're looking for a free alternative, you could try Afloat or LayerX. Other great apps like PixelPerfect are CThruView Transparent Image Viewer, Uberlayer, Overlay and GluePrint.

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PixelPerfect

Free • Proprietary

Mac
Windows
Linux
Microsoft Edge
Internet Explorer
Google Chrome
Safari
Opera
Firefox

Allows developers to put a semi-transparent image overlay over the top of the developed HTML and perform per pixel...

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Overlay2
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Paid • Proprietary
Mac
Windows
11 alternatives to Overlay2
Overlay2 is like digital tracing paper for your computer. It opens a semi-transparent floating image over video capture or editing software, or 3D modelling software, so you can use the image as a reference or positioning guide.
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Overlay2 Features
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Afloat
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Free • Open Source
Mac
SIMBL
21 alternatives to Afloat
Make any app able to float on top.
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Afloat Features
On top
Interface Overlay
LayerX
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Free • Open Source
Image Viewer
Mac
8 alternatives to LayerX
An intuitive app to display transparent images on screen.
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LayerX Features
On top
Drag and Drop
Add a screenshot
CThruView Transparent Image Viewer
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Free • Open Source
Image Viewer
Mac
Windows
Linux
Online
9 alternatives to CThruView Transparent Image Viewer
CThruView is a free transparent image viewer that allows mouse clicks to go through the image. This makes your image see through and click through, so use it as tracing paper, splash screen or watermark.
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CThruView Transparent Image Viewer Features
1. PortableCThruView Transparent Image Viewer can be used from a USB stick or similar with no prior installation.
Transparency
Java based
Discontinued
The project is no longer developed. Last version, 1.0, released in September 2010, can be still downloaded from the official website.
Uberlayer
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No
Paid • Proprietary
Mac
7 alternatives to Uberlayer
With the Uberlayer app you can put floating images on top of your computer screen. Maybe you want to proof a design to the pixel, watermark a presentation or always have that special picture of your mother on top?

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Overlay
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Paid • Proprietary
Mac
9 alternatives to Overlay
A frame that allows you to have an image or even PDF displayed semi-transparently in front of everything. It enables you to copy, trace, or compare designs, images, and documents with ease, since you can lock the frame and make it undisturbed by mouse gestures.
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Overlay Features
On top
GluePrint
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No
Paid • Proprietary
Mac
7 alternatives to GluePrint
Turn any mockup into a floating guide, and visually align pixels with ease.

Use GluePrint to implement your interfaces pixel perfect. Simply open a mockup and lock it on top of your work to see how it compares. Position with the arrow keys and scroll to adjust the transparency. .
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GluePrint Features
Transparency