Apps
Slack
Built on Electron, Slack stores Chromium disk cache entries for downloaded workspace assets, message media, avatars, and web content, along with V8 compiled code cache and GPU shader or render cache data to speed up startup and interface rendering. Over time those cached files can become stale after Slack, Chromium, or graphics driver updates, leading to broken UI elements, slow launches, or display glitches. Kudu removes Slack's Cache_Data, Code Cache, and GPUCache files while leaving messages, workspaces, sign-in state, settings, and saved credentials untouched.
Why clean Slack?
- Stale Chromium disk cache entries can leave Slack showing broken images, missing avatars, or message attachments that never finish loading even though the network is working
- Invalidated V8 compiled code after a Slack or Electron update can make the next launch unusually slow, with a blank or unresponsive window until the code cache rebuilds
- Old GPU cache data from a graphics driver update can cause black panels, flickering sidebars, or rendering artifacts in channels and threads until Slack regenerates its GPU cache
- Corrupted Cache_Data files can trap Slack in repeated reloads or endless loading spinners when switching workspaces because the app keeps reusing bad local web resources
- An oversized media and asset cache can consume hundreds of megabytes or more on disk, especially across multiple active workspaces with lots of shared images and previews
- Out-of-date cached frontend assets can make Slack display mismatched interface pieces after an update, such as buttons that do nothing or dialogs that render incorrectly
- Clearing old cache forces Slack to fetch fresh workspace assets and rebuild local browser caches, which often resolves strange UI behavior without affecting chats, account data, or preferences
What gets cleaned
Cache paths Kudu targets
Windows
%AppData%/Slack/Cache/Cache_Data |
%AppData%/Slack/Code Cache |
%AppData%/Slack/GPUCache |
macOS
~/Library/Application Support/Slack/Cache/Cache_Data |
Linux
~/.config/Slack/Cache/Cache_Data |
Frequently asked
Common questions about Slack
Related cleaners
Free & open source
Download Kudu and reclaim your disk space.
Available on Windows, macOS, and Linux. No account required, no feature gates, no telemetry without consent. All cleaning targets are open source and community-auditable.