Local Storage Inspector

Tracking since Apr 14, 2026.

Changelog

• Apr 22, 2026
  description

  Inspector and editor for local and session storage values. Providers an improved editor UI to easily see and change values of keys, including complex JSON objects.

  Inspector and editor for local and session storage values. Providers an improved editor UI to easily see and change values of keys, including complex JSON objects.Browser DevTools show you localStorage. They don't let you work with it.
  
  **Local Storage Inspector** opens a side panel next to the page you're debugging and gives you the tools the Application tab has been missing:
  
  ### A real JSON editor
  - CodeMirror 6 with One Dark syntax highlighting
  - Inline validation — the Save button stays disabled until your JSON parses
  - Pretty-print on open, compact on save
  - Pretty-printed JSON is detected automatically; plain strings stay plain
  
  ### A live change log
  - Every `setItem`, `removeItem`, and `clear` on the page is captured in real time
  - Changes are attributed by source: `page` vs. `extension`, so you can see whether your app or you triggered it
  - Pause and resume recording with one click
  - Timestamps down to the millisecond
  
  ### Field-level diffs
  - Collapsed rows show a one-line summary (`(new)`, `value changed`, or a list of changed JSON fields)
  - Expand a row to see an **inline diff** with changed lines highlighted
  - Toggle to a **unified diff** for the traditional `+`/`-` view
  
  ### Search, import, export
  - Fuzzy-filter keys as you type
  - Bulk import and export the current origin's storage as JSON
  - Toggle between Local and Session storage with one click
  
  ### Layout that stays out of the way
  - Drag handles resize the key list and change log panels
  - Collapse the key list when you need more editor room
  - Re-open the panel and it remembers your layout
  
  ### Privacy
  - No network calls. No analytics. No telemetry.
  - Storage data stays on your machine — it's read from and written to the page you're inspecting, nothing more.
  - Host permissions are optional and requested per-site on demand.
  
  ### Built for engineers
  - Manifest V3
  - Open source (MIT) — https://github.com/pete-the-pete/local-storage-inspector
  - TypeScript, React 19, CodeMirror 6
  - Covered by unit and end-to-end tests
  
  Click the extension icon on any page and the side panel opens up, that's it.

• Apr 22, 2026
  permissions

  activeTab, scripting

  activeTab, scripting, sidePanel

Permissions & access

Permissions

activeTabscriptingsidePanel

Host access

None declared

Screenshots