Browser storage estimate
Only reads navigator.storage.estimate(), displays usage, quota, available space, and the ratio, and does not write to any storage.
Local browser processing
This page has passed the public directory check; full functionality is available after enabling JavaScript.
User Guide
How to use browser storage estimation
Browser storage estimation processes input only in the current browser and does not upload it, connect to the internet, or write to persistent storage.
Open tools
On the first page load, it reads the read-only estimate API.
View metrics
View usage, quota, available space, ratio, and usageDetails.
Reload
Click refresh to read again; if it fails or is unsupported, old metrics will be cleared.
Limitations and Notes
- The quota/usage results vary across browsers, private browsing modes, and origins.
- The tool does not write to localStorage, IndexedDB, Cache API, or any files.
- The estimate is not a hard quota commitment or a storage cleanup recommendation.
FAQ
Will it create test data?
No, it only calls the read-only estimate.
Why is there no data?
The browser may not support API, or estimate may return an unavailable value.
Will the results be saved?
No, it will not be retained after the page is refreshed.