Is localStorage scoped per site?

Yes. localStorage is scoped to the current origin (protocol + hostname + port). Data stored on one site is not accessible to any other site.

How much data can localStorage hold?

Most browsers allow around 5–10 MB of localStorage per origin. The exact limit varies by browser. This tool shows an estimated size based on the UTF-16 encoding of stored strings.

Are changes I make here permanent?

Yes — changes made with setItem and removeItem persist in your browser until the site or you clear them. Clearing your browser data will erase localStorage. There is no undo, so delete keys with care.

LocalStorage Viewer

Browse, add, edit, and delete localStorage entries for the current origin.

entries

est. size

0 B

No localStorage entries found for this origin.

Add Entry

Related Tools

CKICookie Viewer

Parse and display all accessible cookies for the current page.

BRWBrowser Info

Detect browser name, version, OS, and check support for key web APIs.

FAQ

Is localStorage scoped per site?: Yes. localStorage is scoped to the current origin (protocol + hostname + port). Data stored on one site is not accessible to any other site.
How much data can localStorage hold?: Most browsers allow around 5–10 MB of localStorage per origin. The exact limit varies by browser. This tool shows an estimated size based on the UTF-16 encoding of stored strings.
Are changes I make here permanent?: Yes — changes made with setItem and removeItem persist in your browser until the site or you clear them. Clearing your browser data will erase localStorage. There is no undo, so delete keys with care.

The LocalStorage Viewer lists all key–value pairs stored in localStorage for the current browser origin. You can add new entries, edit existing values inline, and delete individual keys. The total storage size is estimated and displayed. All operations call the standard localStorage API (getItem, setItem, removeItem) directly in your browser.