Who should use Grid Rhythm?

Grid Rhythm is an open-source project built for web developers and frontend designers.

Yes — Grid Rhythm is open source under the Open Source license and free to use.

What platforms does Grid Rhythm run on?

Grid Rhythm runs on the web and embeddable surfaces.

Is Grid Rhythm still active?

Unverified. Grid Rhythm has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

Who develops Grid Rhythm?

Grid Rhythm is developed by Abel K. Butler.

When did Grid Rhythm launch?

Grid Rhythm first shipped in 2026.

Is Grid Rhythm open source?

Yes — Grid Rhythm is open source under the Open Source license.

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Grid Rhythm

Name: Grid Rhythm
Author: Abel K. Butler

mozilla.orgBrowser DevTools & extensions

Grid Rhythm is a Firefox extension for previewing CSS grid gaps and columns. It generates copyable CSS grid snippets for web developers and frontend designers, and does not require data collection.

Open SourceWebEmbeddable

Visit mozilla.org

Overview

5 features

Grid Rhythm is a Browser DevTools & extensions project. It focuses on previewing CSS grid spacing and column layouts without manually testing styles in a page. Grid Rhythm is an open-source project aimed at web developers and frontend designers. The project is open source (Open Source). It runs on the web and embeddable surfaces.

Behind Grid Rhythm is Abel K. Butler, and it first shipped in 2026. Among its 5 catalogued features are gap preview, column preview, and CSS snippets. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Gap preview
Column preview
CSS snippets
Copy to clipboard
No data collection

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

License

Open Source

Verified signals

HTTPSPrivacy Policy Terms of ServiceOpen SourceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed27 Aug · 15:51 UTC
Grid Rhythm verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Grid Rhythm

What is Grid Rhythm?: Grid Rhythm focuses on previewing CSS grid spacing and column layouts without manually testing styles in a page. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Grid Rhythm?: Grid Rhythm is an open-source project built for web developers and frontend designers.
Is Grid Rhythm free?: Yes — Grid Rhythm is open source under the Open Source license and free to use.
What platforms does Grid Rhythm run on?: Grid Rhythm runs on the web and embeddable surfaces.
Is Grid Rhythm still active?: Unverified. Grid Rhythm has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
Who develops Grid Rhythm?: Grid Rhythm is developed by Abel K. Butler.
When did Grid Rhythm launch?: Grid Rhythm first shipped in 2026.
Is Grid Rhythm open source?: Yes — Grid Rhythm is open source under the Open Source license.

At a glance

Pricing: Open Source
Platforms: Web
License: Open Source
First seen: 27 Aug 2026
Built for: web developers and frontend designers
Model: Open source
Solves: Previewing CSS grid spacing and column layouts without manually testing styles in a page.

Registered as

Firefox Add-ons: grid-rhythm

Developer

Abel K. Butler

Index record

Indexed: 27 Aug 2026
Lifecycle: Alive
First seen: Aug 2026
Last seen: 27 Aug 2026

Identity audit (13)

Slug: grid-rhythm-mozilla-org
Lifecycle last checked: 8 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 27 Aug 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 27 Aug 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/grid-rhythm

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