ReplyGuard

Last updated: 2026-11-10 (version 0.4.1)

ReplyGuard is a Chrome extension that checks the email you are about to send for template placeholders you forgot to replace (for example {customer_name} or [ORDER_ID]).

What ReplyGuard reads

When you press Send in Gmail on the web, ReplyGuard reads the subject and the text you typed in the draft (not the quoted earlier messages or your signature). The check runs entirely inside your browser, on your computer.

What ReplyGuard does NOT do

• It does not upload, store, log, or transmit your emails, recipients, subjects, or any message content anywhere.
• It does not use analytics, tracking, advertising, or any third-party code.
• It does not send, delete, or modify your emails. If it stops a send, you press Send yourself again.

What is stored on your computer

Using Chrome's local extension storage (chrome.storage.local), ReplyGuard stores only your custom rules (the placeholder text you add in Settings). This data stays in your browser profile. It is not synced to or sent to any server.

Network requests

ReplyGuard makes no network requests. It has no servers, no accounts and no analytics.

Permissions

• storage: save your custom rules locally.
• Access to mail.google.com: read the draft at the moment you press Send, to run the check locally.

Data deletion

Remove the extension, or clear its data in Chrome, and everything stored by ReplyGuard is deleted.

Changes

If this policy changes, the updated version will be posted at this address with a new date.