Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of INSPEKT

INSPEKT by Jonas Arden

Debug faster: visualize outlines, measure elements, inspect text styles, audit SEO, and check heading hierarchy.

0 (0 reviews)0 (0 reviews)
2 Users2 Users
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
About this extension
INSPEKT is a powerful frontend debugging tool designed for designers and developers. Inspect any webpage with professional-grade tools—all within your browser, with zero setup required.

🎨 FEATURES

Element Outlines
• Visualize page structure instantly. Each HTML element gets a unique color for easy identification.

Measurement Tool
• Measure distances between elements with pixel-perfect accuracy. Alt+Click to select elements and see spacing, dimensions, and distances in real-time.

Text Styles Inspector
• Hover over any text to see complete styling details: font family, size, weight, line height, letter spacing, color, and more.

Live Text Editing
• Enable edit mode to make temporary content changes—perfect for testing copy variations.

Heading Hierarchy
• Analyze document structure and accessibility. View all headings (H1-H6), detect skipped levels, and get improvement recommendations.

SEO Audit
• Comprehensive SEO analysis including title tags, meta descriptions, Open Graph tags, Twitter Cards, canonical URLs, and robots directives.

Full Page Screenshots
• Capture complete webpage screenshots, including content below the fold.

Customizable Settings
• Choose light or dark theme, position the panel in any corner, customize measurement colors, and toggle feature visibility.

🔒 PRIVACY FIRST

• No data collection
• No external servers
• No tracking or analytics
• All processing happens locally in your browser
• Settings stored locally only

✨ PERFECT FOR

• Frontend Developers debugging layouts and element spacing
• UI/UX Designers verifying designs
• SEO Specialists auditing metadata

📋 HOW IT WORKS
  1. Click the Inspekt icon in your toolbar
  2. Select a tool from the panel
  3. Interact with the page to inspect elements
  4. Customize settings to match your workflow

All tools work instantly—no page reload, no setup, no configuration files.

🆓 COMPLETELY FREE

No subscriptions, no ads, no premium features. Inspekt is free forever.

Made with ❤️ by Jonas Arden
Rated 0 by 0 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
0
4
0
3
0
2
0
1
0
No reviews yet
Permissions and data

Required permissions:

  • Access your data for all websites

Data collection:

  • The developer says this extension doesn't require data collection.
Learn more
More information
Add-on Links
  • Support Email
Version
1.1.0
Size
42.12 KB
Last updated
24 days ago (Nov 25, 2025)
Related Categories
  • Web Development
License
All Rights Reserved
Privacy Policy
Read the privacy policy for this add-on
Version History
  • See all versions
Tags
  • privacy
  • security
Add to collection
Report this add-on
Go to Mozilla's homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Browsers

  • Desktop
  • Mobile
  • Enterprise

Products

  • Browsers
  • VPN
  • Relay
  • Monitor
  • Pocket
  • Bluesky (@firefox.com)
  • Instagram (Firefox)
  • YouTube (firefoxchannel)
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.