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How Much Storage Is Available?

See your browser's storage quota, current usage, and persistence status. All data is read locally via the StorageManager API and never leaves your device.

This tool reads your browser's storage quota (total available space) and current usage across IndexedDB, Cache API, and other browser storage mechanisms via the navigator.storage API.

Modern browsers typically allocate up to 60% of the device's total disk space per origin, but may evict data from non-persistent storage when disk space runs low.

Detecting storage...

What Do Your Results Mean?

Result Range Meaning
Good Usage below 50% of quota, persistence granted Plenty of storage available and your data is protected from automatic eviction. Web apps can store offline data without risk.
Warning Usage above 50% or persistence not granted Storage is filling up or the browser may evict your data under disk pressure. Consider clearing unused site data or requesting persistent storage.
Bad Near quota limit or StorageManager unavailable Storage is almost full or your browser does not support the StorageManager API. Web apps may fail to save data.

Common Issues and How to Fix Them

Storage quota shows as very low

Your device's disk may be nearly full. Free up disk space by removing unused apps or files. The browser's storage quota is a percentage of your total available disk space.

Persistence status shows 'Not Persisted'

Request persistent storage by bookmarking the site, adding it to your home screen, or granting notification permissions. Chrome considers site engagement when granting persistence.

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Frequently Asked Questions

What is browser storage quota?

Browser storage quota is the maximum amount of disk space your browser allocates to a single website for storing data via IndexedDB, Cache API, and other web storage mechanisms. It is typically around 60% of the device's free disk space.

What happens when storage runs out?

When the browser's overall storage is full and disk space is low, it may automatically evict data from sites without persistent storage, starting with the least recently used. This is called storage eviction or quota enforcement.

What does persistent storage mean?

Persistent storage tells the browser not to automatically delete your site's stored data when disk space runs low. Without persistence, the browser can evict IndexedDB and Cache data at any time to free up space.

Is any storage data sent to a server?

No. This tool only reads your browser's local storage statistics. No data is transmitted, logged, or stored remotely. Everything runs entirely in your browser.