How do I check if my website is responsive?

Paste your site's URL and run a responsive check comparing mobile, tablet, and desktop panes at once. If content overlaps, text gets cut off, or you need to scroll sideways, that's a responsive design issue worth fixing.

Is Responsive Tool free to use?

Yes. The full tool is free with no signup and no account required.

Do you store the URLs I test?

No. Your URL and device choices only live in your browser's address bar so you can bookmark or share a setup. Nothing is saved on a server.

Does Responsive Tool work with React, Next.js, Vue, or other frameworks?

Yes. Responsive Tool loads your live, deployed URL directly in the browser, so the framework you built it with doesn't matter. It just needs to be publicly reachable.

How does this compare to testing on a real physical device?

It's not a replacement. Responsive Tool simulates CSS viewport sizes in your current browser, which is fast for catching layout bugs, but it can't test touch behavior, real network conditions, or browser-engine differences the way an actual device can.

Fact sheet · Developer Tools

Responsive Tool

Free responsive website checker for mobile, tablet and desktop

0 votes. Log in to vote for Responsive Tool in the file community vote²Follow the file. Log in to follow Responsive Tool's file Not yet verified by the maker

A free browser-based tool that tests website responsiveness by displaying mobile, tablet and desktop viewports side by side simultaneously without requiring

Overview

Screenshot of the Responsive Tool homepage — What responsivetool.com looks like

Responsive Tool lets you test your website's responsiveness by displaying it across multiple device viewports at the same time. Simply paste a URL and instantly see how your site looks on mobile, tablet, and desktop—swap any pane's device instantly, test custom widths, and refresh individual panes or all at once. The tool runs entirely in your browser with no signup, download, or account required, making it fast and accessible for developers, freelancers, and agencies checking layouts before deployment.

Feature facts

Test multiple device viewports simultaneously
Real CSS viewport rendering
Share setup links
Custom pixel width testing
No installation required
Sync scroll across panes
Browser-based with no account needed

Pricing

Pricing model: Free

Follow the file. Log in to follow Responsive Tool's file

Follow Responsive Tool: their milestones, new launches and awards come to you by email, once a day by default.

Responsive Tool specifications

Specifications of Responsive Tool
Section	Developer Tools
Website	responsivetool.com
Votes²	0

Responsive Tool metrics

Fact file for responsivetool.com: Ahrefs Domain Rating and Majestic link facts, each with the change since the last fact check.
Metric	Value
Domain Rating	0 no change since last check
Trust Flow	1 no change since last check
Citation Flow	25 no change since last check
Referring domains	14 no change since last check
External backlinks	32 no change since last check

Fact: Ahrefs Domain Rating checked 12 Nov 2026, fact changed 25 Oct 2026. Fact: top topic Computers/Internet/Web Design and Development (1). Fact: Majestic checked 25 Oct 2026, fact changed 25 Oct 2026. Link facts from Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.

Responsive Tool domain fact sheet

Open the fact sheet

Read from the public RDAP record on 12 Nov 2026, 08:11 UTC.
Domain age	2 months
Registered	3 Sep 2026
Expires	3 Sep 2027
Registrar	HOSTINGER operations, UAB
DNSSEC	Not signed

Every domain fact for responsivetool.com

Responsive Tool launch receipt sheet

What we have measured for Responsive Tool since it went live on SaaS Directory Info on 25 October 2026.

0 Domain Rating (Ahrefs) no change since launch
at launch: 0 (25 Oct 2026); latest: 11 Nov 2026
1 Trust Flow (Majestic)
first measured 25 Oct 2026
14 Referring domains (Majestic)
first measured 25 Oct 2026

Day 17 since launch. Next receipt: day 30, 24 Nov 2026. The figures report a change; they do not say what caused it, and many things can. No figure here is a guess.

Biggest gains on SaaS Directory Info

Got a launch coming up?

Step-by-step tips for before, during and after your launch, free to read on SaaS Directory Info.

Prepare
Launch day
Launch week
Next steps

Read the launch playbook

Compare and explore

Frequently looked up

Q1How do I check if my website is responsive?: Paste your site's URL and run a responsive check comparing mobile, tablet, and desktop panes at once. If content overlaps, text gets cut off, or you need to scroll sideways, that's a responsive design issue worth fixing.
Q2Is Responsive Tool free to use?: Yes. The full tool is free with no signup and no account required.
Q3Do you store the URLs I test?: No. Your URL and device choices only live in your browser's address bar so you can bookmark or share a setup. Nothing is saved on a server.
Q4Does Responsive Tool work with React, Next.js, Vue, or other frameworks?: Yes. Responsive Tool loads your live, deployed URL directly in the browser, so the framework you built it with doesn't matter. It just needs to be publicly reachable.
Q5How does this compare to testing on a real physical device?: It's not a replacement. Responsive Tool simulates CSS viewport sizes in your current browser, which is fast for catching layout bugs, but it can't test touch behavior, real network conditions, or browser-engine differences the way an actual device can.

Leave a review for Responsive Tool

Review count for Responsive Tool: none yet. Add the first.

Fact: reviews are free and cannot be bought. All reviews, in brief

Reviews and facts · Fact updates · Share these facts · Your SaaS? Claim this fact file · Report a wrong fact

Product	Origin	DR¹	Votes²
liquid-technologiesXML code generator for C# and Visual Basic .Net that creates strongly typed object models from XML schemas	United Kingdom	70	0 votes. Log in to vote for liquid-technologies in the file
APIGitGit-native platform for building, publishing, sharing, and securing APIs	United States	36	0 votes. Log in to vote for APIGit in the file
eryxWebAssembly sandbox for running untrusted Python safely	not stated	0	0 votes. Log in to vote for eryx in the file
TestFlows MachineRun your programs deterministically. Record, replay, and branch your runs.	not stated	2	0 votes. Log in to vote for TestFlows Machine in the file