IconVault's LocalStorage Explorer opens a window into your browser's localStorage for the current origin. Browse every key with its size and value preview, search keys and values, and view, add, edit or delete entries through simple dialogs, which makes debugging cached settings, tokens and app state far easier than devtools digging.

A storage usage meter estimates how much of the roughly 5 MB quota you have used, and you can export everything to JSON or import a JSON export back. It only ever touches this site's origin, runs fully in your browser with nothing uploaded, and is free to try (heavy repeated use may ask for Pro). Viewing is unlimited; add, edit, delete and export use the trial.