Who should use Browser Ruler?

Browser Ruler is an open-source project built for web designers, developers, and QA testers.

What platforms does Browser Ruler run on?

Browser Ruler runs on the web and embeddable surfaces.

Is Browser Ruler still active?

Unverified. Browser Ruler 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.

What projects are similar to Browser Ruler?

Similar projects tracked by PulseGate include Reading Ruler, Measure-it, and Dimensions Browser Extension.

Who makes Browser Ruler?

Browser Ruler is developed by Ian Wremmel.

How long has Browser Ruler been around?

Browser Ruler first shipped in 2017.

Back to the index

Browser Ruler

Name: Browser Ruler
Author: Ian Wremmel

github.comBrowser DevTools & extensions

Browser Ruler is an open-source browser extension for measuring distances and dimensions directly on web pages. It helps web designers, developers, and QA testers inspect page layouts and compare visual spacing in Chrome or Firefox.

Open SourceWebEmbeddable

Visit github.com

Overview

5 features

Browser Ruler is a Browser DevTools & extensions project. It focuses on measuring distances and dimensions on web pages without external screenshot or design tools. Browser Ruler is an open-source project aimed at web designers, developers, and QA testers. Browser Ruler is open source under the Open Source license. It runs on the web and embeddable surfaces.

Ian Wremmel builds and maintains Browser Ruler, and it first shipped in 2017. Among its 5 catalogued features are on-page measurement, distance measurement, and dimension measurement.

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

On-page measurement
Distance measurement
Dimension measurement
Chrome support
Firefox support

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

License

Open Source

Verified signals

HTTPSOpen SourceFree tierStore-verified publisher

Indexing history

What PulseGate has recorded for this listing

Indexed8 Sept · 04:24 UTC
ruler verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Browser Ruler

What does Browser Ruler do?: Browser Ruler focuses on measuring distances and dimensions on web pages without external screenshot or design tools. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Browser Ruler?: Browser Ruler is an open-source project built for web designers, developers, and QA testers.
Is Browser Ruler free?: Yes — Browser Ruler is open source under the Open Source license and free to use.
What platforms does Browser Ruler run on?: Browser Ruler runs on the web and embeddable surfaces.
Is Browser Ruler still active?: Unverified. Browser Ruler 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.
What projects are similar to Browser Ruler?: Similar projects tracked by PulseGate include Reading Ruler, Measure-it, and Dimensions Browser Extension.Reading Ruler Measure-it Dimensions Browser Extension
Who makes Browser Ruler?: Browser Ruler is developed by Ian Wremmel.
How long has Browser Ruler been around?: Browser Ruler first shipped in 2017.

At a glance

Pricing: Open Source
Platforms: Web
Languages: English
License: Open Source
First seen: 8 Sept 2026
Built for: web designers, developers, and QA testers
Model: Open source
Solves: Measuring distances and dimensions on web pages without external screenshot or design tools.

Registered as

Firefox Add-ons: browser-ruler

Developer

Ian Wremmel

Index record

Indexed: 8 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 8 Sept 2026

Identity audit (13)

Slug: ruler-github-com
Lifecycle state recorded: 8 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 8 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
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: 8 Sept 2026
Canonical URL: https://github.com/ianwremmel/browser-ruler

Ship this? Send a correction — no account, and you get a link to follow it.

Similar projects

Closest matches by what these projects do