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github.com/KevinParnell/OneeChan Social Media Tools Open-source project

This theme adds customizable styling for 4chan X, with version 5.10.2 listed on the project page.

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github.com/KevinParnell/OneeChan
Theme homepage screenshot

About Theme

OneeChan is a userscript designed to run on top of 4chan X, the popular third-party extension for the 4chan imageboard. It is a maintained fork of the original OneeChan project, with the latest stable version 5.10.2 released in November 2024, and is hosted publicly on GitHub.

The script adds extensive customization options for 4chan X, including prebuilt themes, custom font support, adjustable scrollbar and reply box styling, and the ability to hide ad banners. It also includes optional, swappable mascot overlays that users can enable, change, or disable entirely. Recent updates add full compatibility with 4chan XT, the modern iteration of 4chan X, as well as support for 4channel.org’s SFW boards.

Key features

  • Customizable prebuilt themes and visual styling for 4chan X
  • Optional swappable mascot overlays that can be fully disabled
  • Toggleable ad banner hiding for 4chan and 4chan X
  • Custom font support with multiple prelisted font options
  • Compatibility with 4chan XT and 4channel.org SFW boards
  • Adjustable reply box positioning and scrollbar styling
Best for: It is best suited for 4chan X users who want to personalize their imageboard browsing experience with custom visuals, ad controls, and optional mascot overlays.
Good for
  • Actively maintained with regular updates through 2024
  • Wide range of visual and functional customization options
  • Supports both classic 4chan X and 4chan XT
  • Optional mascots can be fully disabled at user preference
Watch out for
  • Requires a third-party userscript manager to install and run
  • Custom fonts require local installation on the user’s device
  • Only compatible with 4chan X, not vanilla 4chan

Theme at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Open source
Not stated
Language
English
Last checked
Oct 5, 2026 · Online when checked
Listed
Oct 5, 2026
mediasocial mediamedia toolssocial media tools

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Theme FAQ

What is OneeChan?
OneeChan is a userscript that adds customizable themes, styling, and optional mascots for the 4chan X browser extension for 4chan.
Does OneeChan work with 4chan XT?
Yes, versions 5.10.0 and later include full compatibility with 4chan XT, including support for its header icon and fxtwitter embeds.
Can I turn off the mascot overlays?
Yes, mascots are fully optional and can be disabled entirely in the OneeChan settings menu.
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Listing maintained by Chris McClure and the WebIndexly editors · Updated Oct 6, 2026 · How we rank