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Extensionsv0.1.1

Spoof Timezone Next

Spoof your browser timezone

Updated August 10, 2026
Install
  • Manifest V3
  • TypeScript
  • Intl API
  • storage

Spoof Timezone Next changes the browser timezone exposed via Date and Intl. Set a fixed or random IANA timezone and limit it to specific sites.

Features

Date and Intl protection

Overrides getTimezoneOffset, Intl.DateTimeFormat, resolvedOptions, and common Date formatting methods so pages read the timezone you chose — not the system default.

Fixed IANA timezone

Pick any IANA zone (for example Europe/London) and keep it stable across tabs while you test locale-sensitive flows.

Random mode

Assign a new timezone on each page load when you want to reduce simple timezone fingerprinting during casual browsing.

Per-site controls

Enable or disable spoofing per hostname from the popup. Scope it to all sites, a whitelist, or a blacklist.

Keyboard shortcut

⌘/Ctrl+Shift+T toggles spoofing for the current site so you can compare real vs spoofed behavior quickly.

Local settings only

Preferences stay in chrome.storage.local with no analytics. Refresh pages after changes so scripts re-read the spoofed zone.

Frequently asked questions

Privacy policy

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