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Preview of Breakgrid – Responsive Viewport Tester

Breakgrid – Responsive Viewport Tester by ByteSide.io

Test responsive websites efficiently. Resize your browser window to common viewport sizes with one click. Features predefined presets for all devices, custom resolutions, favorites system, and keyboard shortcuts.

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Breakgrid - Responsive Viewport TesterBreakgrid Settings - Preset Management - Built-In and Custom ViewportsBreakgrid Settings - Language & Keyboard Shortcuts
About this extension
Breakgrid is the perfect browser extension for developers and designers who want to test responsive websites quickly and efficiently. Resize your browser window to common viewport sizes with one click.

KEY FEATURES

• Predefined Presets: Desktop (4K, Full HD, HD), Tablet (iPad Pro, iPad, Surface), Mobile (iPhone, Samsung Galaxy, Pixel)
• Custom Presets: Create your own resolutions and manage them flexibly
• Quick Resize: Fast input of resolutions (e.g. 1920x1080)
• Favorites System: Mark frequently used presets as favorites
• Recently Used: Quick access to your last 5 used presets
• Keyboard Shortcuts: Ctrl+Shift+→ (Next Preset), Ctrl+Shift+← (Previous Preset)
• Import/Export: Backup and share your custom presets as JSON
• Drag & Drop: Organize your presets as you like

MODERN DESIGN

• Clean & Minimalist: Clear user interface
• Smooth Animations: Pleasant micro-animations for better feedback
• Toast Notifications: Elegant notifications instead of disruptive pop-ups

MULTILINGUAL

Breakgrid supports 8 languages:
Deutsch, English, Español, Français, Italiano, Nederlands, Polski, Português (Brasil)

PRIVACY & SECURITY

• No Data Collection – We don't collect any personal data
• Local Storage Only – All presets stay on your device
• No Server Communication – No data is transmitted
• No Tracking – No cookies, no telemetry
• GDPR Compliant – Fully EU privacy compliant

FAST & RELIABLE

Built with TypeScript and modern web technologies for maximum performance and reliability.

SUPPORT & CONTACT

Questions or feedback? Contact us at breakgrid@byteside.io
Website: https://breakgrid.byteside.io

Made by ByteSide.io
Developer comments
Breakgrid is a professional viewport testing tool designed for web developers and designers.

Key Features:
  • Test responsive designs across 20+ predefined device viewports
  • Create custom viewport sizes
  • Save favorite viewport configurations
  • Keyboard shortcuts for quick navigation
  • 8 languages supported (DE, EN, ES, FR, IT, NL, PL, PT-BR)

Privacy & Security:
  • 100% local operation - no data collection
  • No external servers - all processing happens in your browser
  • No permissions abuse - only uses necessary browser APIs

Perfect for:
  • Web developers testing responsive designs
  • UI/UX designers
  • QA testers
  • Anyone building mobile-first websites

For support, documentation, or feature requests, visit our website or contact us directly.
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More information
Version
1.0.0
Size
1.53 MB
Last updated
a month ago (Nov 16, 2025)
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License
All Rights Reserved
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