Postman
Built on Electron, Postman stores browser-style cache data under %AppData%/Postman, including Chromium HTTP disk cache entries, GPUCache shader and rendering artifacts, Code Cache bytecode, and IndexedDB, Local Storage, and SQLite-backed app state used by the desktop client. These files speed up collection loading, workspace rendering, authentication flows, and embedded web views, but they can also go stale after app or driver updates and leave behind fragmented database pages and oversized cache directories. Kudu removes disposable cache files and compacts Postman’s SQLite databases with VACUUM so wasted space is reclaimed without deleting your collections, environments, accounts, settings, or saved requests.
Why clean Postman?
- Corrupted Chromium HTTP cache entries can make the desktop app show outdated API docs, broken images, or incomplete web content inside embedded views until the cache is rebuilt
- Invalidated Electron V8 Code Cache after a Postman update often causes a noticeably slow first launch, delayed workspace switching, or UI panels that hesitate before rendering
- Stale GPUCache data from a previous graphics driver version can trigger blank panes, black windows, flickering tabs, or lag when opening request builders and visualizers
- IndexedDB and SQLite app-state files can accumulate free pages and fragmentation over time, so searches, collection lists, and sidebar loading feel sluggish even though no new data is being added
- SQLite page fragmentation wastes disk space and slows reads; VACUUM rewrites the database into a compact file without deleting your rows, which can reduce bloat in Postman’s local metadata stores
- Oversized cache folders under %AppData%\Postman can consume hundreds of megabytes or more, and users usually notice it as unexplained profile-folder growth on small system drives
- Stale cached authentication or embedded sign-in web content can leave login windows looping, showing the wrong account state, or failing to refresh properly until local cache files are cleared
Cache paths Kudu targets
These databases are vacuumed (compacted) — no data is deleted. SQLite VACUUM reclaims wasted space left over from normal usage.
Windows
%AppData%/Postman |
Common questions about Postman
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.