Responsive Lab

Unknown author · Developer Tools

Open in Chrome Web Store

Users

Avg rating

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Ratings

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Updated

Apr 20, 2026

Media

1 item

Description

View any URL in multiple device viewports simultaneously. Free & open-source. A free, open-source Chrome extension to preview any URL in multiple device viewports simultaneously.

History

30d 90d 1y all

rating_count is the Chrome Web Store ratings count, not a written-review count.

Details & SEO

SEO signals

Listing completeness signals

Title length
Characters in the extension name.
14
Description length
Characters in the listing description.
179
Media assets
Screenshots and videos on the listing.
1
Has promo video
Whether the listing includes at least one video.
No
Languages
Declared language locales.
1
Developer website
Listing exposes a developer website URL.
No
Contact email
Listing exposes a contact email.
Yes
Keyword in name
Case-insensitive substring match in the name.
—
Keyword in description
Case-insensitive substring match in the description.
—
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
—
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
61.3

These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.