n8n Web Page Text Change Monitor with HTTP Request & Email

Monitor a Web Page for Text Changes—and Get Email Alerts

With the n8n Web Page Text Change Monitor with HTTP Request & Email, you can automatically check a specific page every 6 hours, detect when the text inside a chosen CSS selector changes, and immediately receive an email notification—while storing the latest snapshot in an n8n Data Table.

What this workflow does

• Scheduled monitoring: Runs on a schedule every 6 hours using a scheduled trigger.
• Fetches page content: Uses an HTTP request to retrieve the configured pageUrl.
• Extracts specific text: Extracts the visible text from the configured cssSelector.
• Normalizes and fingerprints: Normalizes the extracted text, then creates a fingerprint and a short excerpt for reporting.
• Compares with last snapshot: Looks up the last saved fingerprint for the same URL in an n8n Data Table.
• Sends an email if changed: If a previous snapshot exists and the fingerprint differs, it emails you with the URL, excerpt, and old/new fingerprints.
• Updates stored state: Upserts the latest fingerprint, excerpt, and timestamp into the Data Table for the next comparison.

Use cases

• Track when a product page’s description, availability text, or pricing note changes.
• Monitor announcements or release notes on a specific section of a website.
• Detect changes in policy text, eligibility criteria, or status messages—only for the exact CSS area you care about.

Technical details

• Nodes/logic: if, set, code, html, data table, email send
• Storage: Create an n8n Data Table named page_watch with url, fingerprint, excerpt, and lastChangedAt.
• Email delivery: Configure an SMTP credential in n8n and select it on the email-sending step.
• Configuration: Set pageUrl, cssSelector, notifyEmail, and fromEmail in the workflow Settings values.