z-context

A Chrome DevTools Extension that displays stacking contexts and z-index values in the elements panel

As of May 2026, z-context has 6,000 users and a 3.47/5 rating from 43 reviews in the Developer Tools category.

Usersno change0%
6.0K
6,000
Ratingno change0%
3.47
43 reviews
Reviewsno change0%
43
Version
3.0.0
Manifest V3

History

1 snapshots

Tracking since Apr 29, 2026.

6.1K6.0K5.9KApr 29, 2026May 26, 2026
View as table
DateUsersRatingReviewsVersion
Apr 29, 20266.0K3.47433.0.0
Now6.0K3.47433.0.0

Permissions & access

Permissions
None declared
Host access
None declared

Screenshots

z-context screenshot 1z-context screenshot 2

About

Why use it? Browsers support a hierarchy of stacking contexts, rather than a single global one. This means that z-index values are often used incorrectly, and arbitrarily high values get set. 

By Using Z-Context, you'll know:

- If the current element creates a stacking context, and why
- What its parent stacking context is
- The z-index value
--------
v3.0.0 - Update to manifest v3 and update stacking context rules https://github.com/gwwar/z-context/pull/29
v2.1.0 - Includes http protocol to facilitate development use cases https://github.com/gwwar/z-context/pull/23
v2.0.0 - Adds support for inspecting iframes https://github.com/gwwar/z-context/pull/21 https://github.com/gwwar/z-context/pull/22
v1.1.0 - Adds z-index stacking context rules as of 2021. Adds fixes for position sticky and shadow dom, props to roperzh and edenilan! See pulls 10, 17 and 18 at  https://github.com/gwwar/z-context.
v1.0.4 - fixes will-change case. a stacking context is created for opacity/transform but not other values https://github.com/gwwar/z-context/pull/9
v1.0.3 - fixes display reason for flex-items https://github.com/gwwar/z-context/pull/4
v1.0.2 - adds new z-index rules, fixes a bug when inspecting a shadow dom elements. https://github.com/gwwar/z-context/pull/3
v1.0.1  - fix reason message for non-static positions, props to giuseppeg. https://github.com/gwwar/z-context/pull/1

Technical

Version
3.0.0
Manifest
V3
Size
30.48KiB
Min Chrome
88
Languages
1
Featured
Yes

Metadata

ID
jigamimbjojkdgnlldajknogfgncplbh
Developer ID
u065661408f28d60e0e959ebb1c43fb7d
Developer Email
[email protected]
Created
Mar 6, 2016
Last Updated (Store)
Nov 28, 2024
Last Scraped
May 26, 2026
Website
Support URL
Privacy Policy

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Data sourced from the Chrome Web Store · last verified May 26, 2026.