Page Monitor & Alert

About

Page Monitor & Alert keeps an eye on any web page and notifies you the moment something changes. Select elements visually, compare content with a colored diff viewer, and trigger alerts on text, HTML, images, or numeric rules. Perfect for product restocks, scoreboards, job postings, price changes, and any page that matters to you.

KEY FEATURES
One-click visual selector — Pick elements directly on the page (no CSS knowledge required).
Multiple trigger modes
Any text change on the page
Text of a specific element changes
HTML of a specific element changes
Image changes (by selector or by direct URL)
Text equals value (exact match)
Number satisfies rule (>, ≥, <, ≤, =)
Diff viewer (colored) — See exactly what was removed/added between previous and current content.
Alerts your way — Desktop notification, toolbar badge, sound beep, open viewer, Email (SMTP relay), Telegram.
Multi-page monitoring — Add as many tasks as you need; each with its own URL, selector, frequency, and alert profile.
Flexible scheduling — Choose the check frequency per task.
Tab Reload fallback — If a site blocks direct fetches, the extension can reload the tab and read content via the content script.
Auto-save & resume — If Chrome asks for extra permissions, your task draft is preserved and auto-saved after you grant them.
Lightweight & private — Settings and tasks are stored locally in your browser.

HOW IT WORKS (quick start)

1. Open the extension popup and click Pick element on page (or paste a URL).

2. Select the part of the page you want to watch; the selector and URL are filled automatically.

3. Choose a trigger mode (e.g., Text of selector changes or Number satisfies rule).

4. Set the Frequency and enable your preferred Alerts.

5. Click Add/Save task. You’re done!

EMAIL & TELEGRAM (optional)

Email (SMTP): Because browser extensions can’t send SMTP directly, you configure a tiny HTTPS relay (e.g., on Vercel using the included helper file) and enter your SMTP credentials (supports Gmail App Passwords). A one-click test is included.

Telegram: Enter your Bot Token and Chat ID and send a test — no server required.

PERMISSIONS
Storage — Save your tasks and settings locally.
Alarms — Schedule periodic checks.
Notifications — Show desktop alerts.
Offscreen — Parse HTML and play a short beep even when no tab is focused.
Tabs & Scripting — Reload/read pages when using the “Use Tab Reload” fallback.
Optional host permissions — Granted per-site only when you monitor that site.

PRIVACY
All tasks and settings are stored locally in your browser.
The extension fetches page content only to compare snapshots for your triggers.
Email requires an optional HTTPS relay you control; Telegram sends messages using the official Bot API with your token.
No analytics, no ad tracking.

FREE VS PRO
Free: Minimum check interval is 60 seconds, all features available.
Pro: Unlock faster intervals (<60s).