PerfectPixel by WellDoneCode (pixel perfect)

Tracking since Apr 5, 2026.

Changelog

• May 11, 2026
  description

  PerfectPixel adds a semi-transparent image overlay on top of any web page, letting you compare your frontend implementation against the original design mockup directly in the browser. Upload a design comp, adjust opacity, and immediately see where your code diverges from the spec — with pixel-perfect accuracy. No more switching between tabs or squinting at two screens side by side.
  
  How it works: install the extension, open any page, and drop in an image — drag and drop, paste a URL, paste from clipboard, or use the file picker. Position and scale the overlay, then adjust opacity to compare.
  
  Features:
  
  - Overlay any PNG, JPG, or SVG on any web page
  - Adjustable opacity for real-time visual comparison
  - 5 blend modes — Normal, Difference, Invert, Multiply, Overlay — each useful for catching different types of mismatches
  - Lock the overlay to click through it and interact with page elements underneath
  - Per-domain persistence: your layers stay saved per site and restore automatically across browser sessions
  - Multiple layers per domain
  - Scaling, repositioning, and centering controls
  - Keyboard shortcuts for common actions
  
  New in version 3.0:
  
  - 5 blend modes for advanced comparison (Difference mode instantly highlights mismatches between design and implementation)
  - Refreshed, modern UI with better feature discoverability
  - Teams and Enterprise plans for agencies and development shops
  
  Pro features:
  
  - Dark theme
  - Unlimited simultaneous layers (free tier supports 2)
  - Layer rotation
  - Custom icon, accent color, and custom CSS
  
  Built for frontend developers, QA engineers, agencies, and development teams who need to verify that what they shipped matches what was designed.
  
  350,000+ developers. 10+ years on the Chrome Web Store.

  PerfectPixel adds a semi-transparent image overlay on top of any web page, letting you compare your frontend implementation against the original design mockup directly in the browser. Upload a design comp, adjust opacity, and immediately see where your code diverges from the spec — with pixel-perfect accuracy. No more switching between tabs or squinting at two screens side by side.
  
  How it works: install the extension, open any page, and drop in an image — drag and drop, paste a URL, paste from clipboard, or use the file picker. Position and scale the overlay, then adjust opacity to compare.
  
  Features:
  
  - Overlay any PNG, JPG, or SVG on any web page
  - Adjustable opacity for real-time visual comparison
  - 4 blend modes (Difference, Invert, Multiply, Overlay) plus Normal — each useful for catching different types of mismatches
  - Lock the overlay to click through it and interact with page elements underneath
  - Per-domain persistence: your layers stay saved per site and restore automatically across browser sessions
  - Multiple layers per domain
  - Scaling, repositioning, and centering controls
  - Keyboard shortcuts for common actions
  
  Pro features:
  
  - Unlimited simultaneous layers (free tier supports 2)
  - Folders to group layers
  - Layer rotation
  - Dark theme
  - Custom icon, accent color, and custom CSS
  
  Built for frontend developers, QA engineers, agencies, and development teams who need to verify that what they shipped matches what was designed.
  
  350,000+ developers. 10+ years on the Chrome Web Store.

• Apr 28, 2026
  short_description

  This extension helps develop your websites with pixel perfect accuracy!

  Drop your mockup on the live page for pixel-perfect comparison with your code.

• Apr 22, 2026
  description

  PerfectPixel is an essential tool for developers and markup designers, allowing for precise, pixel-perfect comparisons by overlaying a semi-transparent image on top of developed HTML.
  
  Features:
  * Multiple Layers Support: Easily manage and compare multiple overlays.
  * Layer Inversion and Scaling: Adjust layers to match your needs.
  * Per-Site Layers: Keep separate layers for each website.
  * Persistent Layers: Your layers are saved between browsing sessions.
  * Minimalistic UI: Simple and intuitive interface.
  * Flexible File Upload: Drag-and-drop, URL pasting, and clipboard support.
  * Enhanced Navigation: Use keyboard arrow keys and mouse wheel for precision.
  * Local File Support: Works seamlessly with local files using the file:// scheme.
  
  PerfectPixel PRO Features:
  * Ad-Free Experience: Enjoy a clean interface without ads.
  * Layer Rotation: Rotate layers for more accurate comparisons.
  * Appearance Customization: Tailor the look of the extension to your preference.
  * Premium Support: Get fast and dedicated support.
  
  Tips:
  * Expand/Collapse: Double-click the header to expand or collapse the main window.
  * Precision Adjustment: Use Shift + arrow keys for 10px position changes.
  
  For detailed updates, visit the Changelog: http://www.welldonecode.com/perfectpixel/changesets/
  Learn more about keyboard shortcuts on our Shortcuts Page: http://www.welldonecode.com/perfectpixel/shortcuts/
  
  Note: This extension is ad-supported. Ads are displayed only within the extension panel and do not affect your browsing experience.

  PerfectPixel adds a semi-transparent image overlay on top of any web page, letting you compare your frontend implementation against the original design mockup directly in the browser. Upload a design comp, adjust opacity, and immediately see where your code diverges from the spec — with pixel-perfect accuracy. No more switching between tabs or squinting at two screens side by side.
  
  How it works: install the extension, open any page, and drop in an image — drag and drop, paste a URL, paste from clipboard, or use the file picker. Position and scale the overlay, then adjust opacity to compare.
  
  Features:
  
  - Overlay any PNG, JPG, or SVG on any web page
  - Adjustable opacity for real-time visual comparison
  - 5 blend modes — Normal, Difference, Invert, Multiply, Overlay — each useful for catching different types of mismatches
  - Lock the overlay to click through it and interact with page elements underneath
  - Per-domain persistence: your layers stay saved per site and restore automatically across browser sessions
  - Multiple layers per domain
  - Scaling, repositioning, and centering controls
  - Keyboard shortcuts for common actions
  
  New in version 3.0:
  
  - 5 blend modes for advanced comparison (Difference mode instantly highlights mismatches between design and implementation)
  - Refreshed, modern UI with better feature discoverability
  - Teams and Enterprise plans for agencies and development shops
  
  Pro features:
  
  - Dark theme
  - Unlimited simultaneous layers (free tier supports 2)
  - Layer rotation
  - Custom icon, accent color, and custom CSS
  
  Built for frontend developers, QA engineers, agencies, and development teams who need to verify that what they shipped matches what was designed.
  
  350,000+ developers. 10+ years on the Chrome Web Store.

Permissions & access

Permissions

activeTabscriptingstorageunlimitedStorage

Host access

<all_urls>

Screenshots

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