Responsive Tester Online — No Watermark on Output
Many free online tools add watermarks to your output — a logo, a URL, or "made with…" branding that ruins professional documents. FlexyPdf's Responsive Tester never adds watermarks to your files. Every output is clean, unmarked, and ready for professional use. Whether you are preparing documents for clients, creating content for your business, or working on school assignments, your results look exactly as you intended — without any third-party branding. This is not a limited trial feature; watermark-free output is always included at no cost.
How to Use Responsive Tester
Enter URL
Type or paste the website URL you want to test for responsive design.
Choose Device
Select from preset device sizes (iPhone, iPad, Android, Desktop) or enter custom dimensions.
Preview & Test
View the website at the selected size. Switch between devices to compare layouts.
Features
Preset Devices
Test on popular device sizes including iPhone, iPad, Android phones, tablets, and desktops.
Custom Dimensions
Enter any custom width and height to test at specific resolutions.
Live Preview
See the website render in real-time at the selected viewport size.
Portrait/Landscape
Toggle between portrait and landscape orientations to test both modes.
Benefits of Using Responsive Tester
Completely Free
Use Responsive Tester without any cost, limits, or hidden fees. No premium plans needed.
No Installation
Works directly in your browser. No software downloads or plugins required.
100% Private
Your files and data are processed locally. Nothing is uploaded to external servers.
Works Everywhere
Compatible with Chrome, Firefox, Safari, Edge on desktop, tablet, and mobile.
No Sign-Up
Start using the tool immediately. No account creation or email verification.
Always Available
Access this tool 24/7 from anywhere in the world, on any device.
Frequently Asked Questions
Complete Your Developer Tools Workflow
These free tools work seamlessly with Responsive Tester to handle every step of your workflow.