PDF Comment Extractor

List the comments and annotations in one or more PDFs with type, author, date, page and contents, and export CSV. A PDF with no comments is reported as having none.

Good to know

Only annotations stored in the PDF are read. Marks flattened into the page cannot be found.
Author and date are whatever the commenting software wrote.
A file that cannot be read is reported, and the batch continues.

Your files stay on your machine

This tool runs entirely inside your browser tab. Nothing is uploaded, stored, or sent to a server — close the tab and every trace is gone.

These are the free ones — see the full suite

How big a file can it take?

There is no upload, so there is no upload limit — but the work happens in this tab, which means your browser’s memory is the budget. Nothing here will refuse a file for being large; a big enough one simply gets slow and, eventually, reloads the tab. The figures below are rules of thumb on a desktop browser, not enforced caps. On a phone or tablet, expect a good deal less.

Files are read one at a time, and every page is visited to find annotations, so page count sets the time: comfortable to several thousand pages in total.
No page images are drawn, so memory use stays low.

Password-protected PDFs are declined whatever their size — unlock the file first. If a run does die on a long document, splitting it into volumes and working through them one at a time is the reliable way round it.