# Ruler Grid

> Ultimate web design toolkit! Precision rulers, eyedropper, font scanner, and live page editing in one powerful tool. Measure distances, pick colors, and tweak any layout in real-time. Build pixel-perfect websites faster. Essential for dev and design.

Canonical page: [https://chrome-stats.com/d/ruler-grid](https://chrome-stats.com/d/ruler-grid)

## Overview

- **ID:** `ruler-grid`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** MDesign
- **Category:** web-development,appearance
- **Daily users:** 40
- **Weekly downloads:** 9
- **Version:** 1.3.0
- **Last updated:** 2026-04-29
- **First published:** 2026-04-26
- **Size:** 4.79 MB
- **Data as of:** 2026-09-15
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/ruler-grid/)

## Description

Ruler Grid — All-in-One Toolkit for Designers & Frontend Developers

Ruler Grid is a powerful Firefox extension that helps you analyze and refine any website’s layout. Measure elements, inspect styles, pick colors, and experiment with designs — all directly in your browser.

Key Features:

• Rulers & Guides
Measure distances and align elements with precision using horizontal and vertical guides.

• Eyedropper Tool
Pick any color or gradient from the page and copy values in HEX, RGB, or HSL.

• Typography Inspector
Identify fonts, sizes, weights, and line heights instantly.

• Live Page Editing
Edit text, spacing, and layout directly on any website without opening DevTools.

• CSS & Style Inspector
View computed styles, CSS properties, and Tailwind classes with one click.

• Responsive Grids
Overlay layout grids to check columns, gutters, and alignment across screen sizes.

Why Ruler Grid?
Fast, lightweight, and easy to use — Ruler Grid gives you the tools you need to analyze layouts and improve your workflow without leaving the page.

## Rankings

- #18,047 — Overall
- #16 — eyedropper
- #16 — grid
- #30 — rule
- #241 — property

## Permissions and access

### Permissions

- `storage`
- `activeTab`
- `tabs`
- `contextMenus`
- `scripting`
- `declarativeNetRequest`
- `downloads`

### Host permissions

- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [Web Design Ruler](https://chrome-stats.com/d/web-design-ruler) — 53 users
- [Pixel measurement](https://chrome-stats.com/d/pixel-measurement) — 47 users
- [Gripper - DevTools for Designers](https://chrome-stats.com/d/gripper-devtools-for-designers) — 4 users
- [Grids & Rulers](https://chrome-stats.com/d/grids-rulers) — 1,090 users, 3.95 / 5
- [Page Ruler](https://chrome-stats.com/d/pageruler) — 1 users
- [Gridly](https://chrome-stats.com/d/gridly) — 10 users, 5.00 / 5
- [Specto Ruler](https://chrome-stats.com/d/specto-ruler) — 5 users
- [Better Page Ruler](https://chrome-stats.com/d/better-page-ruler) — 35 users, 5.00 / 5
- [Apex Tools](https://chrome-stats.com/d/apex-tools) — 1 users
- [Website Inspector](https://chrome-stats.com/d/website-inspector) — 6 users
- [Page Ruler Plus](https://chrome-stats.com/d/page-ruler-plus) — 14 users
- [Layout Ruler](https://chrome-stats.com/d/layout-ruler)

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Source: [Chrome-Stats](https://chrome-stats.com/d/ruler-grid)