Device Emulation Multi-Pane Browser Device Simulation and Responsive Testing Features
Simulate different device resolutions and user agents, support iPhone, iPad, Android, desktop and other device testing. Suitable for frontend developers to test responsive design and ensure websites display well on various devices.
Lightning Fast
Instant JSON comparison with real-time syntax validation
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Your data never leaves your browser - complete privacy
Always Available
24/7 online access - no downloads or installations required
Why Choose Our Device Emulation Features?
Professional multi-pane browser device emulation tool, supporting multiple device simulation, resolution testing, user agent simulation and other features. Suitable for frontend developers and testers.
Device Emulation
Simulate different device resolutions like iPhone, iPad, Android, desktop, etc.
CoreResolution Testing
Support testing from 320px to 4K resolutions.
CoreUser Agent Simulation
Automatically send corresponding device User-Agent strings.
CoreMulti-Device Comparison
Simulate multiple devices simultaneously to compare responsive design effects.
AdvancedCustom Devices
Create custom device configurations to meet special testing needs.
AdvancedQuick Switching
One-click switching between different device modes to improve testing efficiency.
PerformanceReady to Experience Professional JSON Comparison?
Join thousands of developers who trust our JSON difference tool for their daily workflow. Start comparing JSON files with precision and speed.
Start Comparing NowDevice Emulation Usage Steps
Start device emulation testing in just a few simple steps.
Select Device
Choose the device to simulate from the preset device list.
Set Resolution
Adjust window size to match the device resolution.
Simulate User Agent
Send User-Agent information for the corresponding device.
Test Effect
View the display effect of the website on the simulated device.
See JSON Difference in Action
Watch this quick demo to see how easy it is to compare JSON files with our professional tool.
Ready to Get Started?
Join thousands of developers who trust our JSON difference tool for their daily workflow. Start comparing JSON files with professional precision today.
Start Comparing NowUser Reviews
Join thousands of frontend developers and testers who trust our device emulation features to improve development efficiency.
John Frontend
Frontend Developer at WebDev
Device emulation features allow me to quickly test website display effects on different devices, greatly improving development efficiency!
Lisa Tester
QA Tester at TestTeam
Multi-device comparison feature is very practical, can see desktop, tablet, mobile effects simultaneously.
David Designer
UI Designer at DesignLab
Custom device feature allows me to test design effects on special dimensions.
Device Emulation FAQ
Find answers to common questions about our device emulation features. Contact our support team.
Still Have Questions?
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Multi-Pane Browser Features
Explore our complete multi-pane browser features to improve your work efficiency