Supermium
Built on Chromium, Supermium writes a browser cache under its profile containing HTTP disk cache entries, Code Cache bytecode for JavaScript and WASM, GPUCache shader and raster data, Service Worker CacheStorage, and SQLite-backed databases such as History, Favicons, Cookies, and Network Action Predictor with accompanying WAL and journal files. Over time these caches can become stale after browser, site, or graphics-driver changes, and the SQLite files can accumulate free pages and fragmented space. Kudu clears disposable web caches and compacts Supermium’s SQLite databases with VACUUM, rewriting them to remove fragmentation without touching saved accounts, bookmarks, passwords, or other personal browsing data.
Why clean Supermium?
- Corrupted HTTP disk cache entries can make pages load with missing CSS, broken images, or old versions of scripts until the browser fetches fresh copies
- Invalidated Code Cache bytecode after a Supermium update can cause unusually slow first loads, tab jank, or repeated recompilation of the same sites
- Stale GPUCache data after a graphics driver update can trigger black rectangles, flickering video, or sluggish scrolling until Chromium rebuilds its shader cache
- Bloated Service Worker CacheStorage can leave sites showing outdated offline content, stale notifications, or pages that ignore recent server changes
- Oversized media and image cache files can consume multiple gigabytes in the profile folder, which users notice as unexplained disk usage growth
- SQLite databases such as History and Favicons accumulate fragmented pages over time; VACUUM rewrites the file to reclaim space without deleting rows, reducing profile bloat and occasional delays opening history-dependent UI
- Large WAL and journal files left by busy browsing sessions can keep the profile bigger than expected and contribute to slower startup or shutdown while Supermium reconciles database changes
Cache paths Kudu targets
These databases are vacuumed (compacted) — no data is deleted. SQLite VACUUM reclaims wasted space left over from normal usage.
Windows
%LocalAppData%/Supermium/User Data |
macOS
~/Library/Application Support/Supermium |
Linux
~/.config/supermium |
Common questions about Supermium
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.