To monitor a PDF on a website for changes, give a monitor the PDF’s address. monity.ai recognises the document, renders its pages and compares them on every check, so when a supplier replaces its price list or a regulator updates a form at the same link, you get an alert with an AI summary written from the document’s text and the pages before and after.
Step 1: Copy the PDF’s address
Open the PDF in your browser and copy the address, usually one ending in .pdf. PDFs that open in a viewer or sit embedded in a page work too.
Step 2: Create the task
Paste the address into a new task, or tell the assistant: “Watch https://www.irs.gov/pub/irs-pdf/fw9.pdf and tell me when the form changes”. Monity detects that it is a PDF and treats the document itself, not the browser’s viewer, as the page.
Add a Notify me when rule if only some changes matter, such as “a price in the table changes” or “the cancellation terms change”. Without a rule, any meaningful change alerts you.
What you get on each check

- An alert with an AI summary based on the document’s text.
- The pages before and after, with the differences highlighted, and a PDF Diff tab that lists the metadata and the changes page by page.
- Every version kept in the task’s history, so you can see when a clause or a price changed.
When the address changes with every version
Many sites replace a PDF at the same link when they update it, and that is exactly what a PDF task catches. If the site publishes each version at a new address instead, watch the page that links to the PDFs. Monity reads the list of documents on that page, and the alert names the new one.
PDFs behind a login
Supplier portals and member areas often keep their PDFs behind a sign-in. Sign in once in the live browser and every check runs signed in. See how to monitor a page behind a login.
Related: getting an alert when a web page changes, the complete guide to monitoring a website for changes, the PDF task in the docs and PDF and document monitoring.