Audit your browser's persistent storage allocation with our free Browser Storage analyzer. Inspect active LocalStorage, SessionStorage, and IndexedDB capabilities and probe StorageManager quota limits directly inside your browser with complete privacy.
Open the tool to trigger automatic StorageManager estimate queries.
View total available storage capacity in megabytes and current usage percentage.
Review LocalStorage, SessionStorage, and IndexedDB read/write capability flags.
Queries navigator.storage.estimate() to calculate exact origin storage quotas and usage bytes.
Performs synthetic read/write key tests on LocalStorage, SessionStorage, and IndexedDB.
All tests execute in local browser memory. Zero cache bytes or database logs leave your device.
Modern web browsers provide multiple client-side persistence mechanisms, including key-value stores (localStorage and sessionStorage) and transactional object databases (IndexedDB).
The W3C StorageManager API (navigator.storage.estimate()) returns asynchronous promises providing usage and quota byte limits allocated to the origin by the user agent.
Auditing storage quotas helps developers verify web application offline persistence parameters, prevent DOMException quota exceeded errors, and clear local cache buffers safely.