Reddit Contextualizer

Tracking since Apr 17, 2026.

Changelog

• May 5, 2026
  description

  Reddit Contextualizer adds a lightweight activity summary to Reddit’s user hovercards. When you click on a comment author's username in a comments section, you’ll see which subreddits that user has participated in over the past year or so. (Data current through February 2026.)
  
  The extension uses only publicly-available Reddit data. NSFW subreddits and very new communities are excluded to help preserve privacy.
  
  Reddit Contextualizer doesn’t track you or clutter the interface. It simply adds a little data to an existing UI panel to help you better understand conversations as they happen.
  
  Not affiliated with Reddit.

  Reddit Contextualizer adds a lightweight activity summary to Reddit’s user hovercards. When you click on a comment author's username in a comments section, you’ll see which subreddits that user has participated in over the past year or so. (Data current through March 2026.)
  
  The extension uses only publicly-available Reddit data. NSFW subreddits and very new communities are excluded to help preserve privacy.
  
  Reddit Contextualizer doesn’t track you or clutter the interface. It simply adds a little data to an existing UI panel to help you better understand conversations as they happen.
  
  Not affiliated with Reddit.

• Apr 3, 2026
  description

  Reddit Contextualizer adds a lightweight activity summary to Reddit’s user hovercards. When you click on a comment author's username in a comments section, you’ll see which subreddits that user has participated in over the past year or so. (Data current through December 2025.)
  
  The extension uses only publicly-available Reddit data. NSFW subreddits and very new communities are excluded to help preserve privacy.
  
  Reddit Contextualizer doesn’t track you or clutter the interface. It simply adds a little data to an existing UI panel to help you better understand conversations as they happen.
  
  Not affiliated with Reddit.

  Reddit Contextualizer adds a lightweight activity summary to Reddit’s user hovercards. When you click on a comment author's username in a comments section, you’ll see which subreddits that user has participated in over the past year or so. (Data current through February 2026.)
  
  The extension uses only publicly-available Reddit data. NSFW subreddits and very new communities are excluded to help preserve privacy.
  
  Reddit Contextualizer doesn’t track you or clutter the interface. It simply adds a little data to an existing UI panel to help you better understand conversations as they happen.
  
  Not affiliated with Reddit.

Permissions & access

Permissions

None declared

Host access

https://redditcontextualizer-api.sigpwned.com/*

Screenshots

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