Browse, search, edit, and export localStorage and sessionStorage data with JSON formatting support.
Local Storage Viewer exposes the key-value records available through localStorage and sessionStorage to the page hosting the viewer. It lets you switch between the stores, search displayed entries, inspect JSON-shaped strings in a readable form, edit stored data, and export a snapshot. The important boundary is origin isolation: opening this viewer does not grant access to storage belonging to an unrelated website. Web Storage values are also always strings, even when a value contains valid JSON or looks like a number, boolean, or object.
Choosing localStorage or sessionStorage changes which browser Storage object is inspected. Every entry consists of a string key and a string value. Search narrows the displayed records. When a stored string is valid JSON, JSON formatting can expose its object or array structure for inspection. Plain text and malformed JSON remain strings rather than becoming structured data.
Saving an edited value writes a string for its key in the selected storage area. Export captures a point-in-time copy of the storage data available to the viewer. Inspection, editing, formatting, and export happen in the browser, so storage contents are not uploaded. Displaying formatted JSON does not convert Web Storage into an object database or assign native data types.
No. Browser origin rules limit the viewer to storage exposed to its own document. An origin is based on scheme, host, and port, so data from https://example.com is unavailable to a viewer hosted at another origin. To inspect another site's Web Storage, use a context operating on that exact origin, such as the developer tools attached to that site.
No. localStorage and sessionStorage store strings. Formatting presents valid JSON with readable structure; it does not change the saved value unless you explicitly save an edit. JSON whitespace may be insignificant when parsed, but it remains part of the raw stored string. An application that compares raw text can therefore notice whitespace-only edits.
The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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