What does SessionStorage Viewer do?
Inspect browser sessionStorage keys and values to debug client-side state and temporary session data.
View and manage session storage data directly in your browser.
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Inspect browser sessionStorage keys and values to debug client-side state and temporary session data.
Inspect browser sessionStorage keys and values to debug client-side state and temporary session data. This browser-based tool runs locally in your browser for quick, copy-friendly output—no signup required. Results update instantly as you change inputs.
Concise answers for common searches — definitions, steps, and comparisons.
Inspect browser sessionStorage keys and values to debug client-side state and temporary session data.
SessionStorage Viewer runs in your browser for normal use, so inputs are not uploaded to EverydayTools servers.
Navigate to the web app you are debugging, then open Session Storage Viewer on the same origin so it can read that tab's sessionStorage.
All key-value pairs appear in a searchable table. JSON values are formatted for readability so you can inspect nested objects.
Click any value to edit inline, add new key-value pairs, or delete entries to simulate different session states without replaying user flows.
Copy individual values or export the full sessionStorage snapshot for unit tests, bug reports, or QA reproduction steps.
Common real-world scenarios where this tool saves time.
Frontend developers
Inspect keys written during each user step.
QA engineers
Copy session values into defect reports quickly.
Security reviewers
Check whether sensitive data is stored in tab-scoped storage.
How Session Storage Viewer compares to manual and integrated workflows.
| Method | Best for | Trade-off |
|---|---|---|
| Session Storage Viewer | Fast browser workflow with instant, copy-ready results | Validate outputs in production when stakes are high |
| Manual editing or calculation | Single quick checks without opening a tool | Slower and easier to mistype at scale |
| IDE or desktop tooling | Deep integration in a dev environment | Heavier setup than a lightweight web tool |
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It stores per-tab key-value data that persists until the tab or session ends.
sessionStorage is tab-scoped and temporary; localStorage persists across browser restarts.
No. Same-origin policy restricts storage access to the active origin.
It depends on threat model; many teams avoid storing long-lived sensitive tokens there.
Most browsers allow 5–10 MB per origin for sessionStorage—the same quota as localStorage. Exceeding the limit throws a QuotaExceededError when your app calls setItem.
No. Each tab has its own isolated sessionStorage, even for the same origin. Opening a new tab does not inherit sessionStorage from another tab.
Yes—changes take effect immediately in the page's sessionStorage. The running app may react on the next read or storage event. Refresh if the app caches values in memory at startup.
Chrome DevTools Application tab shows sessionStorage under Storage. This tool adds search, JSON formatting, and bulk export—useful for copying values to test fixtures or validating auth flow data.
No. The viewer reads storage locally in your browser; sessionStorage contents are never sent to EverydayTools servers.
SessionStorage Viewer keeps typical inputs on your device for standard browser-based processing.
Displayed keys reflect your current browser context only; avoid storing sensitive secrets in sessionStorage for production applications.
Part of Developer Tools
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Reviewed by EverydayTools Editorial Team on 2026-06-09.
No sessionStorage items found
SessionStorage is empty for this domain. Use the form above to add a key/value or interact with your web application to populate sessionStorage.
Paste a JSON object where each key becomes a sessionStorage key and each value is stored as a string.
The SessionStorage Viewer loads all sessionStorage items for the current domain directly in your browser. To view sessionStorage:
sessionStorage.Both sessionStorage and localStorage are part of the Web Storage API, but they behave differently:
JSON.stringify and parsed with JSON.parse.Use sessionStorage for temporary, per-tab data that should not persist once the user closes the tab:
You can interact with sessionStorage directly in JavaScript while using this SessionStorage Viewer to inspect changes in real time:
sessionStorage.setItem("user", "123");
const user = sessionStorage.getItem("user");
sessionStorage.removeItem("user");
sessionStorage.clear();Run these commands in your browser console or application code, then use this tool to verify what is stored, rename keys, pretty-print JSON payloads, and debug any issues with your session storage logic.