Responsive Design Tester Pro
PulseGate's liveness check found it on 17 Sep 2026; it is registered on Firefox Add-ons and has been in the index since 17 Sep 2026. How this is checked
Responsive Design Tester Pro is a Firefox extension for simulating smartphone, tablet, and desktop viewports while testing web pages. It provides customizable dimensions, device presets, orientation testing, screenshots, and layout debugging tools for web developers and designers.
Inferred · not functionally tested
Overview
6 featuresPurpose: Testing how web pages adapt to different screen sizes and device orientations without manually resizing the browser.
Inferred · not functionally tested
Audience: web developers and designers
Inferred · not functionally tested
Functions: Unknown
Interfaces: API: unknown · MCP: unknown · CLI: unknown · Self-hosting: unknown
Recorded constraints: pricing: free · license: Proprietary · platforms: WEB · deployment: browser, embeddable
Constraint provenance is unknown; confirm requirements with the publisher.
Record sources: addons.mozilla.org · addons.mozilla.org. These links do not verify the individual claims.
Responsive Design Tester Pro is a Browser DevTools & extensions project. Inferred · not functionally tested: It focuses on testing how web pages adapt to different screen sizes and device orientations without manually resizing the browser. Inferred · not functionally tested: It is built as a B2B product for web developers and designers. Basis unknown · not verified: Responsive Design Tester Pro is free to use. Basis unknown · not verified: It runs on the web and embeddable surfaces.
It is developed by Burch, and it first shipped in 2024. Inferred · not functionally tested: Key capabilities include Device Simulation, Viewport Customization, and Device Presets. The interface is available in 32 languages, including Czech, German, and Greek.
Summary written by a language model from the project’s public pages.
Tasks: Inferred · not functionally tested
- Device Simulation
- Viewport Customization
- Device Presets
- Orientation Testing
- Screenshot Capture
- Layout Debugging
Topics: Inferred · not functionally tested
Built with & integrations
Trust & compliance
Indexing history
1What PulseGate has recorded for this listing
- Indexed17 Sep · 19:43 UTCResponsive Design Tester Pro seen via Firefox Add-onsSource: Firefox Add-ons · Open
Frequently asked questions about Responsive Design Tester Pro
- What is Responsive Design Tester Pro?
- Inferred · not functionally tested: Responsive Design Tester Pro focuses on testing how web pages adapt to different screen sizes and device orientations without manually resizing the browser. It is catalogued under Browser DevTools & extensions on PulseGate.
- Who is Responsive Design Tester Pro for?
- Inferred · not functionally tested: Responsive Design Tester Pro is a B2B product built for web developers and designers.
- Is Responsive Design Tester Pro free?
- Basis unknown · not verified: Yes — Responsive Design Tester Pro is free to use.
- What platforms does Responsive Design Tester Pro run on?
- Basis unknown · not verified: Responsive Design Tester Pro runs on the web and embeddable surfaces.
- Is Responsive Design Tester Pro still active?
- PulseGate's liveness check found it on 17 Sep 2026.
- What are alternatives to Responsive Design Tester Pro?
- Similar projects tracked by PulseGate include Responsive Check, Mobile Device Simulator Pro, and Mobile Device Previewer.Responsive CheckMobile Device Simulator ProMobile Device Previewer
- Who develops Responsive Design Tester Pro?
- Responsive Design Tester Pro is developed by Burch.
- When did Responsive Design Tester Pro launch?
- Responsive Design Tester Pro first shipped in 2024.
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