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Measure-it

mozilla.orgBrowser DevTools & extensions

PulseGate's liveness check found it on 13 Sep 2026; it is registered on Firefox Add-ons and has been in the index since 13 Sep 2026. How this is checked

Measure-it is a Firefox browser extension that overlays a ruler on webpages to measure width, height, and alignment in pixels. It is intended for web developers, designers, and users checking webpage layouts.

Inferred · not functionally tested

FreeWebEmbeddable
Measure-it preview
Visit mozilla.org
3alternatives
6features
2018since

Overview

6 features

Purpose: Measuring webpage element dimensions, spacing, and alignment without manually inspecting page code.

Inferred · not functionally tested

Audience: web developers and designers

Inferred · not functionally tested

Functions: Unknown

Interfaces: API: unknown · MCP: unknown · CLI: unknown · Self-hosting: unknown

Recorded constraints: pricing: free · license: Proprietary · platforms: WEB · deployment: browser, embeddable

Constraint provenance is unknown; confirm requirements with the publisher.

Record sources: addons.mozilla.org · addons.mozilla.org. These links do not verify the individual claims.

In the Browser DevTools & extensions space, Measure-it takes a focused approach. Inferred · not functionally tested: It focuses on measuring webpage element dimensions, spacing, and alignment without manually inspecting page code. Inferred · not functionally tested: It is built as a consumer product for web developers and designers. Basis unknown · not verified: It is available for free. Basis unknown · not verified: It ships for the web and embeddable surfaces.

Behind Measure-it is Firefox user 14137346, and it first shipped in 2018. Inferred · not functionally tested: Key capabilities include on-page ruler, pixel measurements, and width measurement. The interface is available in 32 languages, including Czech, German, and Greek.

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

Tasks: Inferred · not functionally tested

  • On-page ruler
  • Pixel measurements
  • Width measurement
  • Height measurement
  • Alignment checking
  • Webpage overlay

Topics: Inferred · not functionally tested

Tags
web-measurementpixel-rulerlayout-inspectionfirefox-extension

JSON profile · Text profile · Access guide

Built with & integrations

Runs on
BrowserEmbeddable

Trust & compliance

Public signals
HTTPSPrivacy PolicyTerms of ServiceFree tierMulti-languageStore listing found
Legal
Privacy Policy Terms of Service

Indexing history

1

What PulseGate has recorded for this listing

  1. Indexed13 Sep · 06:23 UTC
    Measure-it seen via Firefox Add-ons
    Source: Firefox Add-ons · Open

Frequently asked questions about Measure-it

What does Measure-it do?
Inferred · not functionally tested: Measure-it focuses on measuring webpage element dimensions, spacing, and alignment without manually inspecting page code. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Measure-it for?
Inferred · not functionally tested: Measure-it is a consumer product built for web developers and designers.
Does Measure-it have a free plan?
Basis unknown · not verified: Yes — Measure-it is free to use.
What platforms does Measure-it run on?
Basis unknown · not verified: Measure-it runs on the web and embeddable surfaces.
Is Measure-it still active?
PulseGate's liveness check found it on 13 Sep 2026.
What projects are similar to Measure-it?
Similar projects tracked by PulseGate include Pixel Measurement Tool, Measure Everything, and Layout Measure.Pixel Measurement ToolMeasure EverythingLayout Measure
Who develops Measure-it?
Measure-it is developed by Firefox user 14137346.
How long has Measure-it been around?
Measure-it first shipped in 2018.

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