
Pixefy - Responsive Design Checker by Pixefy
Preview and debug your website’s responsiveness across multiple devices in real-time, all inside one browser tab.
3 Users3 Users
You'll need Firefox to use this extension
Extension Metadata
About this extension
Pixefy helps you spot layout issues instantly and fine-tune designs with live editing tools – right as you build.
It simplifies responsive testing by letting you preview, debug, and edit across multiple screen sizes in one place – no more switching tabs or resizing windows manually.
🚀 Key Features:
✅ Live Responsive Previews – Test across multiple screen sizes side-by-side. Scroll, click, and interact on all screens simultaneously.
✅ Custom Screens & Presets – Create and save your own breakpoints, or use popular device resolutions out of the box.
✅ Screen Management – Rearrange, stack (horizontal/vertical), rotate, or zoom screens globally for a flexible workspace.
✅ Inspect & X-Ray – Inspect styles, edit attributes live, and debug layouts with Visual Box Model, grids, and X-Ray overlays.
✅ CSS Debugging Tools – View/edit computed styles, measure distances between elements, compare two elements, and track all changes in the Activity Tab.
✅ Content Editing – Instantly replace text or images, and check word/character counts directly on the page.
✅ Asset Downloads – Extract SVGs, PNGs, and other assets directly from Inspect Tool tabs.
✅ Screenshots – Capture full pages, visible areas, or selected regions in one click.
✅ User Agent Switching – Simulate different devices, browsers, or bots to see how your site adapts.
✅ Accessibility Tools – Test AA/AAA contrast ratios, extract all colors, and preview vision impairments with blindness simulations.
✅ Utilities – Live Dimension Widget (viewport width/height), copy any value or asset to clipboard, clear cache & refresh Pixefy.
✅ Themes – Switch between light and dark mode instantly.
Pixefy is regularly updated based on user feedback.
Report issues or share ideas: www.pixefy.io/feedback
See what’s new: www.pixefy.io/changelog
It simplifies responsive testing by letting you preview, debug, and edit across multiple screen sizes in one place – no more switching tabs or resizing windows manually.
🚀 Key Features:
✅ Live Responsive Previews – Test across multiple screen sizes side-by-side. Scroll, click, and interact on all screens simultaneously.
✅ Custom Screens & Presets – Create and save your own breakpoints, or use popular device resolutions out of the box.
✅ Screen Management – Rearrange, stack (horizontal/vertical), rotate, or zoom screens globally for a flexible workspace.
✅ Inspect & X-Ray – Inspect styles, edit attributes live, and debug layouts with Visual Box Model, grids, and X-Ray overlays.
✅ CSS Debugging Tools – View/edit computed styles, measure distances between elements, compare two elements, and track all changes in the Activity Tab.
✅ Content Editing – Instantly replace text or images, and check word/character counts directly on the page.
✅ Asset Downloads – Extract SVGs, PNGs, and other assets directly from Inspect Tool tabs.
✅ Screenshots – Capture full pages, visible areas, or selected regions in one click.
✅ User Agent Switching – Simulate different devices, browsers, or bots to see how your site adapts.
✅ Accessibility Tools – Test AA/AAA contrast ratios, extract all colors, and preview vision impairments with blindness simulations.
✅ Utilities – Live Dimension Widget (viewport width/height), copy any value or asset to clipboard, clear cache & refresh Pixefy.
✅ Themes – Switch between light and dark mode instantly.
Pixefy is regularly updated based on user feedback.
Report issues or share ideas: www.pixefy.io/feedback
See what’s new: www.pixefy.io/changelog
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Permissions and dataLearn more
Required permissions:
- Block content on any page
- Access browser tabs
- Access browser activity during navigation
Optional permissions:
- Clear recent browsing history, cookies, and related data
- Download files and read and modify the browser’s download history
- Access your data for all websites
More information
- Add-on Links
- Version
- 0.9.7
- Size
- 373.36 KB
- Last updated
- 18 days ago (Sep 11, 2025)
- Related Categories
- License
- All Rights Reserved
- Version History
- Add to collection
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