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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00%7-day growthFlat
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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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Do I really have to upload files to a server to use this? Have not used the extension yet as it does not work with local files. I was expecting there to be an option to "Allow access to file URLs" but the option is not available.
Good extension, but if as me you were looking for something very similar to Firefox's "HeadingMaps" for checking proper heading order here where this falls short. You can get the same result by modifying headingText var on createOutline.js headingText = '<strong><'+this.heading.nodeName+'></strong> <a href="#'+_generateId(this.startingNode)+'">'
Good
Very nice, but it would even better with an option to hide itself after clicking on a headline.
Really needs to be faster. Worked when it didn't take forever.
very nice extension .
I am simple and easy to see. I was very helpful. Thank you! !
Simple et efficace, utilisé depuis plus d'un an pour tous mes développements en html5.
good，very useful
Wonderful extension indeed which surely helps developing well-structured HTML5 documents. Use it to not forget adding headers to sections of your page, or to easily skip between sections of various websites. To those who complain about not being able to get an outline even though the outline icon is visible: try updating your Chrome/Chromium browser; this fixed that issue for me (using 23.0.1271.1 dev).