Web Developer
Developer Tools
Adds a toolbar button with various web developer tools.
Users
1M
Rating
4.5
Reviews
2,831
7D Growth
0|0%
Stable signalUnknownMedium-risk permissions
HTML5 Outliner
Generates a navigable page outline with heading and sectioning elements
Users90KCurrent public install base
Rating4.2Store average score
Reviews261Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview
1 assetsHTML5 Outliner Media preview
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Start
4.24
Latest
4.24
7-day rating change
0.00
2026年7月16日2026年7月22日
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Version0.9.0
ManifestV3
Size25.23KiB
Languages1English
Published
Store updated
Last crawled
English
Overview
Product summary
Review the store description, core capabilities, and common use cases.
This extension is using the HTML5 outline algorithm to create a table of contents.
Should also work well with HTML4 (and older?) pages, that have structured headings.
The table of contents is clickable and tries to highlight the heading/section in question after the jump.
The extension should prove useful to people who find themselves often using online HTML5 outliners.
Comments, bug reports and suggestions much appreciated!
Extension source code: https://github.com/h5o/h5o-chrome
Reviews
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Store average score4.2Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average3.9Average computed only from synced review bodies below
Reviews with text84Synced review bodies
Total ratings / reviews261Chrome Web Store public rating/review count
Store average score: 4.2. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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Very good!
Extremely handy. Agree that it is better than gsnedders as it shows the TYPE of untitled sections.
really nice extension, but when You click on outlined element, the icon vanishes until page reload - fix would be nice ;-)
First, to those who are frustrated that the icon does not appear for local files, the problem is two-fold: 1) Chrome Extensions need to explicitly enable that option (I have made a feature request to the developer to have this added with the line of code that enables the option), 2) Users (ie people who have installed the extension) must enable local file access for each extension (It took me awhile to find this option for other extensions, so this is a documentation issue for Chrome more than this specific extension), Second, to the reviewer that mentioned the lack of outline elements with td elements, this is part of the HTML5 document outline spec. Check out this really awesome article for more info : http://html5doctor.com/outlines/ Certain elements (blockquotes, tds, etc) are considered "document roots" and therefore are not part of the main document outline. The spec, as far as I've read, does not really cover how to resolve this. Third, to those of you who are getting the icon but no outline at all, here's a big question: are you using tables for your layout? If so, you are not following the document outline spec *at all* and should start using CSS like the rest of us did 6 years ago.